Adding debian version 5.10.209-2.debian/5.10.209-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

25 files changed, 4071 insertions, 0 deletions

diff --git a/debian/patches/features/all/aufs5/aufs5-base.patch b/debian/patches/features/all/aufs5/aufs5-base.patch
new file mode 100644
index 000000000..60f24b56b
--- /dev/null
+++ b/debian/patches/features/all/aufs5/aufs5-base.patch
@@ -0,0 +1,332 @@
+From: J. R. Okajima <hooanon05@yahoo.co.jp>
+Date: Tue Apr 7 22:14:47 2020 +0900
+Subject: aufs5.6 base patch
+Origin: https://github.com/sfjro/aufs5-standalone/tree/7c07d9737e9de058981f020d66ac0d4407a80899
+Bug-Debian: https://bugs.debian.org/541828
+
+Patch headers added by debian/bin/genpatch-aufs
+
+SPDX-License-Identifier: GPL-2.0
+aufs5.6 base patch
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index b4a43a9e7fbc..32f7c8c48001 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -2984,6 +2984,19 @@ F:	include/linux/audit.h
+ F:	include/uapi/linux/audit.h
+ F:	kernel/audit*
+ 
++AUFS (advanced multi layered unification filesystem) FILESYSTEM
++M:	"J. R. Okajima" <hooanon05g@gmail.com>
++L:	aufs-users@lists.sourceforge.net (members only)
++L:	linux-unionfs@vger.kernel.org
++W:	http://aufs.sourceforge.net
++T:	git://github.com/sfjro/aufs4-linux.git
++S:	Supported
++F:	Documentation/filesystems/aufs/
++F:	Documentation/ABI/testing/debugfs-aufs
++F:	Documentation/ABI/testing/sysfs-aufs
++F:	fs/aufs/
++F:	include/uapi/linux/aufs_type.h
++
+ AUXILIARY DISPLAY DRIVERS
+ M:	Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
+ S:	Maintained
+diff --git a/drivers/block/loop.c b/drivers/block/loop.c
+index 475e1a738560..8d77e68aa52b 100644
+--- a/drivers/block/loop.c
++++ b/drivers/block/loop.c
+@@ -763,6 +763,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ 	return error;
+ }
+ 
++/*
++ * for AUFS
++ * no get/put for file.
++ */
++struct file *loop_backing_file(struct super_block *sb)
++{
++	struct file *ret;
++	struct loop_device *l;
++
++	ret = NULL;
++	if (MAJOR(sb->s_dev) == LOOP_MAJOR) {
++		l = sb->s_bdev->bd_disk->private_data;
++		ret = l->lo_backing_file;
++	}
++	return ret;
++}
++EXPORT_SYMBOL_GPL(loop_backing_file);
++
+ /* loop sysfs attributes */
+ 
+ static ssize_t loop_attr_show(struct device *dev, char *page,
+diff --git a/fs/dcache.c b/fs/dcache.c
+index 361ea7ab30ea..3cd36474f302 100644
+--- a/fs/dcache.c
++++ b/fs/dcache.c
+@@ -1285,7 +1285,7 @@ enum d_walk_ret {
+  *
+  * The @enter() callbacks are called with d_lock held.
+  */
+-static void d_walk(struct dentry *parent, void *data,
++void d_walk(struct dentry *parent, void *data,
+ 		   enum d_walk_ret (*enter)(void *, struct dentry *))
+ {
+ 	struct dentry *this_parent;
+diff --git a/fs/fcntl.c b/fs/fcntl.c
+index 2e4c0fa2074b..0b28a37f7e50 100644
+--- a/fs/fcntl.c
++++ b/fs/fcntl.c
+@@ -32,7 +32,7 @@
+ 
+ #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
+ 
+-static int setfl(int fd, struct file * filp, unsigned long arg)
++int setfl(int fd, struct file *filp, unsigned long arg)
+ {
+ 	struct inode * inode = file_inode(filp);
+ 	int error = 0;
+@@ -63,6 +63,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
+ 
+ 	if (filp->f_op->check_flags)
+ 		error = filp->f_op->check_flags(arg);
++	if (!error && filp->f_op->setfl)
++		error = filp->f_op->setfl(filp, arg);
+ 	if (error)
+ 		return error;
+ 
+diff --git a/fs/inode.c b/fs/inode.c
+index 72c4c347afb7..a7ff2099c2ef 100644
+--- a/fs/inode.c
++++ b/fs/inode.c
+@@ -1768,7 +1768,7 @@ EXPORT_SYMBOL(generic_update_time);
+  * This does the actual work of updating an inodes time or version.  Must have
+  * had called mnt_want_write() before calling this.
+  */
+-static int update_time(struct inode *inode, struct timespec64 *time, int flags)
++int update_time(struct inode *inode, struct timespec64 *time, int flags)
+ {
+ 	if (inode->i_op->update_time)
+ 		return inode->i_op->update_time(inode, time, flags);
+diff --git a/fs/namespace.c b/fs/namespace.c
+index f30ed401cc6d..8ddebaf7ad57 100644
+--- a/fs/namespace.c
++++ b/fs/namespace.c
+@@ -792,6 +792,12 @@ static inline int check_mnt(struct mount *mnt)
+ 	return mnt->mnt_ns == current->nsproxy->mnt_ns;
+ }
+ 
++/* for aufs, CONFIG_AUFS_BR_FUSE */
++int is_current_mnt_ns(struct vfsmount *mnt)
++{
++	return check_mnt(real_mount(mnt));
++}
++
+ /*
+  * vfsmount lock must be held for write
+  */
+diff --git a/fs/read_write.c b/fs/read_write.c
+index 4fb797822567..744831cd0094 100644
+--- a/fs/read_write.c
++++ b/fs/read_write.c
+@@ -507,6 +507,28 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
+ 	return ret;
+ }
+ 
++vfs_readf_t vfs_readf(struct file *file)
++{
++	const struct file_operations *fop = file->f_op;
++
++	if (fop->read)
++		return fop->read;
++	if (fop->read_iter)
++		return new_sync_read;
++	return ERR_PTR(-ENOSYS); /* doesn't have ->read(|_iter)() op */
++}
++
++vfs_writef_t vfs_writef(struct file *file)
++{
++	const struct file_operations *fop = file->f_op;
++
++	if (fop->write)
++		return fop->write;
++	if (fop->write_iter)
++		return new_sync_write;
++	return ERR_PTR(-ENOSYS); /* doesn't have ->write(|_iter)() op */
++}
++
+ /* caller is responsible for file_start_write/file_end_write */
+ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
+ {
+diff --git a/fs/splice.c b/fs/splice.c
+index d7c8a7c4db07..f0b625e27554 100644
+--- a/fs/splice.c
++++ b/fs/splice.c
+@@ -839,8 +839,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
+ /*
+  * Attempt to initiate a splice from pipe to file.
+  */
+-static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+-			   loff_t *ppos, size_t len, unsigned int flags)
++long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
++		    loff_t *ppos, size_t len, unsigned int flags)
+ {
+ 	if (out->f_op->splice_write)
+ 		return out->f_op->splice_write(pipe, out, ppos, len, flags);
+@@ -850,9 +850,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ /*
+  * Attempt to initiate a splice from a file to a pipe.
+  */
+-static long do_splice_to(struct file *in, loff_t *ppos,
+-			 struct pipe_inode_info *pipe, size_t len,
+-			 unsigned int flags)
++long do_splice_to(struct file *in, loff_t *ppos,
++		  struct pipe_inode_info *pipe, size_t len,
++		  unsigned int flags)
+ {
+ 	int ret;
+ 
+diff --git a/fs/sync.c b/fs/sync.c
+index 1373a610dc78..b7b5a0a0df6f 100644
+--- a/fs/sync.c
++++ b/fs/sync.c
+@@ -28,7 +28,7 @@
+  * wait == 1 case since in that case write_inode() functions do
+  * sync_dirty_buffer() and thus effectively write one block at a time.
+  */
+-static int __sync_filesystem(struct super_block *sb, int wait)
++int __sync_filesystem(struct super_block *sb, int wait)
+ {
+ 	if (wait)
+ 		sync_inodes_sb(sb);
+diff --git a/include/linux/fs.h b/include/linux/fs.h
+index f5abba86107d..0b008da5678d 100644
+--- a/include/linux/fs.h
++++ b/include/linux/fs.h
+@@ -1360,6 +1360,7 @@ extern void fasync_free(struct fasync_struct *);
+ /* can be called from interrupts */
+ extern void kill_fasync(struct fasync_struct **, int, int);
+ 
++extern int setfl(int fd, struct file *filp, unsigned long arg);
+ extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
+ extern int f_setown(struct file *filp, unsigned long arg, int force);
+ extern void f_delown(struct file *filp);
+@@ -1848,6 +1849,7 @@ struct file_operations {
+ 	ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
+ 	unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
+ 	int (*check_flags)(int);
++	int (*setfl)(struct file *, unsigned long);
+ 	int (*flock) (struct file *, int, struct file_lock *);
+ 	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
+ 	ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
+@@ -1918,6 +1920,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
+ 			      struct iovec *fast_pointer,
+ 			      struct iovec **ret_pointer);
+ 
++typedef ssize_t (*vfs_readf_t)(struct file *, char __user *, size_t, loff_t *);
++typedef ssize_t (*vfs_writef_t)(struct file *, const char __user *, size_t,
++				loff_t *);
++vfs_readf_t vfs_readf(struct file *file);
++vfs_writef_t vfs_writef(struct file *file);
++
+ extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
+ extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
+ extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
+@@ -2352,6 +2360,7 @@ extern int current_umask(void);
+ extern void ihold(struct inode * inode);
+ extern void iput(struct inode *);
+ extern int generic_update_time(struct inode *, struct timespec64 *, int);
++extern int update_time(struct inode *, struct timespec64 *, int);
+ 
+ /* /sys/fs */
+ extern struct kobject *fs_kobj;
+@@ -2633,6 +2642,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
+ 	return false;
+ }
+ #endif
++extern int __sync_filesystem(struct super_block *, int);
+ extern int sync_filesystem(struct super_block *);
+ extern const struct file_operations def_blk_fops;
+ extern const struct file_operations def_chr_fops;
+diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
+index 8fce5c98a4b0..c1a3f172e97a 100644
+--- a/include/linux/lockdep.h
++++ b/include/linux/lockdep.h
+@@ -395,6 +395,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
+ 	return lock->key == key;
+ }
+ 
++struct lock_class *lockdep_hlock_class(struct held_lock *hlock);
++
+ /*
+  * Acquire a lock.
+  *
+@@ -540,6 +542,7 @@ struct lockdep_map { };
+ 
+ #define lockdep_depth(tsk)	(0)
+ 
++#define lockdep_is_held(lock)			(1)
+ #define lockdep_is_held_type(l, r)		(1)
+ 
+ #define lockdep_assert_held(l)			do { (void)(l); } while (0)
+diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
+index 8f882f5881e8..6b9808f09843 100644
+--- a/include/linux/mnt_namespace.h
++++ b/include/linux/mnt_namespace.h
+@@ -7,12 +7,15 @@ struct mnt_namespace;
+ struct fs_struct;
+ struct user_namespace;
+ struct ns_common;
++struct vfsmount;
+ 
+ extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
+ 		struct user_namespace *, struct fs_struct *);
+ extern void put_mnt_ns(struct mnt_namespace *ns);
+ extern struct ns_common *from_mnt_ns(struct mnt_namespace *);
+ 
++extern int is_current_mnt_ns(struct vfsmount *mnt);
++
+ extern const struct file_operations proc_mounts_operations;
+ extern const struct file_operations proc_mountinfo_operations;
+ extern const struct file_operations proc_mountstats_operations;
+diff --git a/include/linux/splice.h b/include/linux/splice.h
+index 5c47013f708e..fef6c59ed92a 100644
+--- a/include/linux/splice.h
++++ b/include/linux/splice.h
+@@ -93,4 +93,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
+ 
+ extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
+ extern const struct pipe_buf_operations default_pipe_buf_ops;
++
++extern long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
++			   loff_t *ppos, size_t len, unsigned int flags);
++extern long do_splice_to(struct file *in, loff_t *ppos,
++			 struct pipe_inode_info *pipe, size_t len,
++			 unsigned int flags);
+ #endif
+diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
+index 29a8de4c50b9..6cfff5e18c84 100644
+--- a/kernel/locking/lockdep.c
++++ b/kernel/locking/lockdep.c
+@@ -169,7 +169,7 @@ static
+ struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
+ static DECLARE_BITMAP(lock_classes_in_use, MAX_LOCKDEP_KEYS);
+ 
+-static inline struct lock_class *hlock_class(struct held_lock *hlock)
++inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
+ {
+ 	unsigned int class_idx = hlock->class_idx;
+ 
+@@ -190,6 +190,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
+ 	 */
+ 	return lock_classes + class_idx;
+ }
++#define hlock_class(hlock) lockdep_hlock_class(hlock)
+ 
+ #ifdef CONFIG_LOCK_STAT
+ static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], cpu_lock_stats);
+-- 
+2.27.0
+
diff --git a/debian/patches/features/all/aufs5/aufs5-mmap.patch b/debian/patches/features/all/aufs5/aufs5-mmap.patch
new file mode 100644
index 000000000..4cf1e0b2b
--- /dev/null
+++ b/debian/patches/features/all/aufs5/aufs5-mmap.patch
@@ -0,0 +1,405 @@
+From: J. R. Okajima <hooanon05@yahoo.co.jp>
+Date: Tue Apr 7 22:14:47 2020 +0900
+Subject: aufs5.6 mmap patch
+Origin: https://github.com/sfjro/aufs5-standalone/tree/7c07d9737e9de058981f020d66ac0d4407a80899
+Bug-Debian: https://bugs.debian.org/541828
+
+Patch headers added by debian/bin/genpatch-aufs
+
+SPDX-License-Identifier: GPL-2.0
+aufs5.6 mmap patch
+
+Index: debian-kernel/fs/proc/base.c
+===================================================================
+--- debian-kernel.orig/fs/proc/base.c
++++ debian-kernel/fs/proc/base.c
+@@ -2170,7 +2170,7 @@ static int map_files_get_link(struct den
+ 	rc = -ENOENT;
+ 	vma = find_exact_vma(mm, vm_start, vm_end);
+ 	if (vma && vma->vm_file) {
+-		*path = vma->vm_file->f_path;
++		*path = vma_pr_or_file(vma)->f_path;
+ 		path_get(path);
+ 		rc = 0;
+ 	}
+Index: debian-kernel/fs/proc/nommu.c
+===================================================================
+--- debian-kernel.orig/fs/proc/nommu.c
++++ debian-kernel/fs/proc/nommu.c
+@@ -40,7 +40,10 @@ static int nommu_region_show(struct seq_
+ 	file = region->vm_file;
+ 
+ 	if (file) {
+-		struct inode *inode = file_inode(region->vm_file);
++		struct inode *inode;
++
++		file = vmr_pr_or_file(region);
++		inode = file_inode(file);
+ 		dev = inode->i_sb->s_dev;
+ 		ino = inode->i_ino;
+ 	}
+Index: debian-kernel/fs/proc/task_mmu.c
+===================================================================
+--- debian-kernel.orig/fs/proc/task_mmu.c
++++ debian-kernel/fs/proc/task_mmu.c
+@@ -280,7 +280,10 @@ show_map_vma(struct seq_file *m, struct
+ 	const char *name = NULL;
+ 
+ 	if (file) {
+-		struct inode *inode = file_inode(vma->vm_file);
++		struct inode *inode;
++
++		file = vma_pr_or_file(vma);
++		inode = file_inode(file);
+ 		dev = inode->i_sb->s_dev;
+ 		ino = inode->i_ino;
+ 		pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
+@@ -1793,7 +1796,7 @@ static int show_numa_map(struct seq_file
+ 	struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
+ 	struct vm_area_struct *vma = v;
+ 	struct numa_maps *md = &numa_priv->md;
+-	struct file *file = vma->vm_file;
++	struct file *file = vma_pr_or_file(vma);
+ 	struct mm_struct *mm = vma->vm_mm;
+ 	struct mempolicy *pol;
+ 	char buffer[64];
+Index: debian-kernel/fs/proc/task_nommu.c
+===================================================================
+--- debian-kernel.orig/fs/proc/task_nommu.c
++++ debian-kernel/fs/proc/task_nommu.c
+@@ -155,7 +155,10 @@ static int nommu_vma_show(struct seq_fil
+ 	file = vma->vm_file;
+ 
+ 	if (file) {
+-		struct inode *inode = file_inode(vma->vm_file);
++		struct inode *inode;
++
++		file = vma_pr_or_file(vma);
++		inode = file_inode(file);
+ 		dev = inode->i_sb->s_dev;
+ 		ino = inode->i_ino;
+ 		pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT;
+Index: debian-kernel/include/linux/mm.h
+===================================================================
+--- debian-kernel.orig/include/linux/mm.h
++++ debian-kernel/include/linux/mm.h
+@@ -1684,6 +1684,28 @@ static inline void unmap_shared_mapping_
+ 	unmap_mapping_range(mapping, holebegin, holelen, 0);
+ }
+ 
++extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int);
++extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[],
++				      int);
++extern void vma_do_get_file(struct vm_area_struct *, const char[], int);
++extern void vma_do_fput(struct vm_area_struct *, const char[], int);
++
++#define vma_file_update_time(vma)	vma_do_file_update_time(vma, __func__, \
++								__LINE__)
++#define vma_pr_or_file(vma)		vma_do_pr_or_file(vma, __func__, \
++							  __LINE__)
++#define vma_get_file(vma)		vma_do_get_file(vma, __func__, __LINE__)
++#define vma_fput(vma)			vma_do_fput(vma, __func__, __LINE__)
++
++#ifndef CONFIG_MMU
++extern struct file *vmr_do_pr_or_file(struct vm_region *, const char[], int);
++extern void vmr_do_fput(struct vm_region *, const char[], int);
++
++#define vmr_pr_or_file(region)		vmr_do_pr_or_file(region, __func__, \
++							  __LINE__)
++#define vmr_fput(region)		vmr_do_fput(region, __func__, __LINE__)
++#endif /* !CONFIG_MMU */
++
+ extern int access_process_vm(struct task_struct *tsk, unsigned long addr,
+ 		void *buf, int len, unsigned int gup_flags);
+ extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
+Index: debian-kernel/include/linux/mm_types.h
+===================================================================
+--- debian-kernel.orig/include/linux/mm_types.h
++++ debian-kernel/include/linux/mm_types.h
+@@ -276,6 +276,7 @@ struct vm_region {
+ 	unsigned long	vm_top;		/* region allocated to here */
+ 	unsigned long	vm_pgoff;	/* the offset in vm_file corresponding to vm_start */
+ 	struct file	*vm_file;	/* the backing file or NULL */
++	struct file	*vm_prfile;	/* the virtual backing file or NULL */
+ 
+ 	int		vm_usage;	/* region usage count (access under nommu_region_sem) */
+ 	bool		vm_icache_flushed : 1; /* true if the icache has been flushed for
+@@ -355,6 +356,7 @@ struct vm_area_struct {
+ 	unsigned long vm_pgoff;		/* Offset (within vm_file) in PAGE_SIZE
+ 					   units */
+ 	struct file * vm_file;		/* File we map to (can be NULL). */
++	struct file *vm_prfile;		/* shadow of vm_file */
+ 	void * vm_private_data;		/* was vm_pte (shared mem) */
+ 
+ #ifdef CONFIG_SWAP
+Index: debian-kernel/kernel/fork.c
+===================================================================
+--- debian-kernel.orig/kernel/fork.c
++++ debian-kernel/kernel/fork.c
+@@ -570,7 +570,7 @@ static __latent_entropy int dup_mmap(str
+ 			struct inode *inode = file_inode(file);
+ 			struct address_space *mapping = file->f_mapping;
+ 
+-			get_file(file);
++			vma_get_file(tmp);
+ 			if (tmp->vm_flags & VM_DENYWRITE)
+ 				atomic_dec(&inode->i_writecount);
+ 			i_mmap_lock_write(mapping);
+Index: debian-kernel/mm/Makefile
+===================================================================
+--- debian-kernel.orig/mm/Makefile
++++ debian-kernel/mm/Makefile
+@@ -52,7 +52,7 @@ obj-y			:= filemap.o mempool.o oom_kill.
+ 			   mm_init.o percpu.o slab_common.o \
+ 			   compaction.o vmacache.o \
+ 			   interval_tree.o list_lru.o workingset.o \
+-			   debug.o gup.o $(mmu-y)
++			   prfile.o debug.o gup.o $(mmu-y)
+ 
+ # Give 'page_alloc' its own module-parameter namespace
+ page-alloc-y := page_alloc.o
+Index: debian-kernel/mm/filemap.c
+===================================================================
+--- debian-kernel.orig/mm/filemap.c
++++ debian-kernel/mm/filemap.c
+@@ -2676,7 +2676,7 @@ vm_fault_t filemap_page_mkwrite(struct v
+ 	vm_fault_t ret = VM_FAULT_LOCKED;
+ 
+ 	sb_start_pagefault(inode->i_sb);
+-	file_update_time(vmf->vma->vm_file);
++	vma_file_update_time(vmf->vma);
+ 	lock_page(page);
+ 	if (page->mapping != inode->i_mapping) {
+ 		unlock_page(page);
+Index: debian-kernel/mm/mmap.c
+===================================================================
+--- debian-kernel.orig/mm/mmap.c
++++ debian-kernel/mm/mmap.c
+@@ -179,7 +179,7 @@ static struct vm_area_struct *remove_vma
+ 	if (vma->vm_ops && vma->vm_ops->close)
+ 		vma->vm_ops->close(vma);
+ 	if (vma->vm_file)
+-		fput(vma->vm_file);
++		vma_fput(vma);
+ 	mpol_put(vma_policy(vma));
+ 	vm_area_free(vma);
+ 	return next;
+@@ -910,7 +910,7 @@ again:
+ 	if (remove_next) {
+ 		if (file) {
+ 			uprobe_munmap(next, next->vm_start, next->vm_end);
+-			fput(file);
++			vma_fput(vma);
+ 		}
+ 		if (next->anon_vma)
+ 			anon_vma_merge(vma, next);
+@@ -1831,8 +1831,8 @@ out:
+ 	return addr;
+ 
+ unmap_and_free_vma:
++	vma_fput(vma);
+ 	vma->vm_file = NULL;
+-	fput(file);
+ 
+ 	/* Undo any partial mapping done by a device driver. */
+ 	unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
+@@ -2683,7 +2683,7 @@ int __split_vma(struct mm_struct *mm, st
+ 		goto out_free_mpol;
+ 
+ 	if (new->vm_file)
+-		get_file(new->vm_file);
++		vma_get_file(new);
+ 
+ 	if (new->vm_ops && new->vm_ops->open)
+ 		new->vm_ops->open(new);
+@@ -2702,7 +2702,7 @@ int __split_vma(struct mm_struct *mm, st
+ 	if (new->vm_ops && new->vm_ops->close)
+ 		new->vm_ops->close(new);
+ 	if (new->vm_file)
+-		fput(new->vm_file);
++		vma_fput(new);
+ 	unlink_anon_vmas(new);
+  out_free_mpol:
+ 	mpol_put(vma_policy(new));
+@@ -2894,7 +2894,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
+ 	struct vm_area_struct *vma;
+ 	unsigned long populate = 0;
+ 	unsigned long ret = -EINVAL;
+-	struct file *file;
++	struct file *file, *prfile;
+ 
+ 	pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.\n",
+ 		     current->comm, current->pid);
+@@ -2969,10 +2969,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
+ 		}
+ 	}
+ 
+-	file = get_file(vma->vm_file);
++	vma_get_file(vma);
++	file = vma->vm_file;
++	prfile = vma->vm_prfile;
+ 	ret = do_mmap_pgoff(vma->vm_file, start, size,
+ 			prot, flags, pgoff, &populate, NULL);
++	if (!IS_ERR_VALUE(ret) && file && prfile) {
++		struct vm_area_struct *new_vma;
++
++		new_vma = find_vma(mm, ret);
++		if (!new_vma->vm_prfile)
++			new_vma->vm_prfile = prfile;
++		if (new_vma != vma)
++			get_file(prfile);
++	}
++	/*
++	 * two fput()s instead of vma_fput(vma),
++	 * coz vma may not be available anymore.
++	 */
+ 	fput(file);
++	if (prfile)
++		fput(prfile);
+ out:
+ 	mmap_write_unlock(mm);
+ 	if (populate)
+@@ -3263,7 +3280,7 @@ struct vm_area_struct *copy_vma(struct v
+ 		if (anon_vma_clone(new_vma, vma))
+ 			goto out_free_mempol;
+ 		if (new_vma->vm_file)
+-			get_file(new_vma->vm_file);
++			vma_get_file(new_vma);
+ 		if (new_vma->vm_ops && new_vma->vm_ops->open)
+ 			new_vma->vm_ops->open(new_vma);
+ 		vma_link(mm, new_vma, prev, rb_link, rb_parent);
+Index: debian-kernel/mm/nommu.c
+===================================================================
+--- debian-kernel.orig/mm/nommu.c
++++ debian-kernel/mm/nommu.c
+@@ -540,7 +540,7 @@ static void __put_nommu_region(struct vm
+ 		up_write(&nommu_region_sem);
+ 
+ 		if (region->vm_file)
+-			fput(region->vm_file);
++			vmr_fput(region);
+ 
+ 		/* IO memory and memory shared directly out of the pagecache
+ 		 * from ramfs/tmpfs mustn't be released here */
+@@ -672,7 +672,7 @@ static void delete_vma(struct mm_struct
+ 	if (vma->vm_ops && vma->vm_ops->close)
+ 		vma->vm_ops->close(vma);
+ 	if (vma->vm_file)
+-		fput(vma->vm_file);
++		vma_fput(vma);
+ 	put_nommu_region(vma->vm_region);
+ 	vm_area_free(vma);
+ }
+@@ -1195,7 +1195,7 @@ unsigned long do_mmap(struct file *file,
+ 					goto error_just_free;
+ 				}
+ 			}
+-			fput(region->vm_file);
++			vmr_fput(region);
+ 			kmem_cache_free(vm_region_jar, region);
+ 			region = pregion;
+ 			result = start;
+@@ -1272,10 +1272,10 @@ error_just_free:
+ 	up_write(&nommu_region_sem);
+ error:
+ 	if (region->vm_file)
+-		fput(region->vm_file);
++		vmr_fput(region);
+ 	kmem_cache_free(vm_region_jar, region);
+ 	if (vma->vm_file)
+-		fput(vma->vm_file);
++		vma_fput(vma);
+ 	vm_area_free(vma);
+ 	return ret;
+ 
+Index: debian-kernel/mm/prfile.c
+===================================================================
+--- /dev/null
++++ debian-kernel/mm/prfile.c
+@@ -0,0 +1,86 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Mainly for aufs which mmap(2) different file and wants to print different
++ * path in /proc/PID/maps.
++ * Call these functions via macros defined in linux/mm.h.
++ *
++ * See Documentation/filesystems/aufs/design/06mmap.txt
++ *
++ * Copyright (c) 2014-2020 Junjro R. Okajima
++ * Copyright (c) 2014 Ian Campbell
++ */
++
++#include <linux/mm.h>
++#include <linux/file.h>
++#include <linux/fs.h>
++
++/* #define PRFILE_TRACE */
++static inline void prfile_trace(struct file *f, struct file *pr,
++			      const char func[], int line, const char func2[])
++{
++#ifdef PRFILE_TRACE
++	if (pr)
++		pr_info("%s:%d: %s, %pD2\n", func, line, func2, f);
++#endif
++}
++
++void vma_do_file_update_time(struct vm_area_struct *vma, const char func[],
++			     int line)
++{
++	struct file *f = vma->vm_file, *pr = vma->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	file_update_time(f);
++	if (f && pr)
++		file_update_time(pr);
++}
++
++struct file *vma_do_pr_or_file(struct vm_area_struct *vma, const char func[],
++			       int line)
++{
++	struct file *f = vma->vm_file, *pr = vma->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	return (f && pr) ? pr : f;
++}
++
++void vma_do_get_file(struct vm_area_struct *vma, const char func[], int line)
++{
++	struct file *f = vma->vm_file, *pr = vma->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	get_file(f);
++	if (f && pr)
++		get_file(pr);
++}
++
++void vma_do_fput(struct vm_area_struct *vma, const char func[], int line)
++{
++	struct file *f = vma->vm_file, *pr = vma->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	fput(f);
++	if (f && pr)
++		fput(pr);
++}
++
++#ifndef CONFIG_MMU
++struct file *vmr_do_pr_or_file(struct vm_region *region, const char func[],
++			       int line)
++{
++	struct file *f = region->vm_file, *pr = region->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	return (f && pr) ? pr : f;
++}
++
++void vmr_do_fput(struct vm_region *region, const char func[], int line)
++{
++	struct file *f = region->vm_file, *pr = region->vm_prfile;
++
++	prfile_trace(f, pr, func, line, __func__);
++	fput(f);
++	if (f && pr)
++		fput(pr);
++}
++#endif /* !CONFIG_MMU */
diff --git a/debian/patches/features/all/aufs5/aufs5-standalone.patch b/debian/patches/features/all/aufs5/aufs5-standalone.patch
new file mode 100644
index 000000000..ffd06c8ce
--- /dev/null
+++ b/debian/patches/features/all/aufs5/aufs5-standalone.patch
@@ -0,0 +1,308 @@
+From: J. R. Okajima <hooanon05@yahoo.co.jp>
+Date: Tue Apr 7 22:14:47 2020 +0900
+Subject: aufs5.6 standalone patch
+Origin: https://github.com/sfjro/aufs5-standalone/tree/7c07d9737e9de058981f020d66ac0d4407a80899
+Bug-Debian: https://bugs.debian.org/541828
+
+Patch headers added by debian/bin/genpatch-aufs
+
+SPDX-License-Identifier: GPL-2.0
+aufs5.6 standalone patch
+
+Index: debian-kernel/fs/dcache.c
+===================================================================
+--- debian-kernel.orig/fs/dcache.c
++++ debian-kernel/fs/dcache.c
+@@ -1390,6 +1390,7 @@ rename_retry:
+ 	seq = 1;
+ 	goto again;
+ }
++EXPORT_SYMBOL_GPL(d_walk);
+ 
+ struct check_mount {
+ 	struct vfsmount *mnt;
+@@ -2935,6 +2936,7 @@ void d_exchange(struct dentry *dentry1,
+ 
+ 	write_sequnlock(&rename_lock);
+ }
++EXPORT_SYMBOL_GPL(d_exchange);
+ 
+ /**
+  * d_ancestor - search for an ancestor
+Index: debian-kernel/fs/exec.c
+===================================================================
+--- debian-kernel.orig/fs/exec.c
++++ debian-kernel/fs/exec.c
+@@ -111,6 +111,7 @@ bool path_noexec(const struct path *path
+ 	return (path->mnt->mnt_flags & MNT_NOEXEC) ||
+ 	       (path->mnt->mnt_sb->s_iflags & SB_I_NOEXEC);
+ }
++EXPORT_SYMBOL_GPL(path_noexec);
+ 
+ #ifdef CONFIG_USELIB
+ /*
+Index: debian-kernel/fs/fcntl.c
+===================================================================
+--- debian-kernel.orig/fs/fcntl.c
++++ debian-kernel/fs/fcntl.c
+@@ -85,6 +85,7 @@ int setfl(int fd, struct file *filp, uns
+  out:
+ 	return error;
+ }
++EXPORT_SYMBOL_GPL(setfl);
+ 
+ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
+                      int force)
+Index: debian-kernel/fs/file_table.c
+===================================================================
+--- debian-kernel.orig/fs/file_table.c
++++ debian-kernel/fs/file_table.c
+@@ -162,6 +162,7 @@ over:
+ 	}
+ 	return ERR_PTR(-ENFILE);
+ }
++EXPORT_SYMBOL_GPL(alloc_empty_file);
+ 
+ /*
+  * Variant of alloc_empty_file() that doesn't check and modify nr_files.
+@@ -376,6 +377,7 @@ void __fput_sync(struct file *file)
+ }
+ 
+ EXPORT_SYMBOL(fput);
++EXPORT_SYMBOL_GPL(__fput_sync);
+ 
+ void __init files_init(void)
+ {
+Index: debian-kernel/fs/inode.c
+===================================================================
+--- debian-kernel.orig/fs/inode.c
++++ debian-kernel/fs/inode.c
+@@ -1774,6 +1774,7 @@ int update_time(struct inode *inode, str
+ 		return inode->i_op->update_time(inode, time, flags);
+ 	return generic_update_time(inode, time, flags);
+ }
++EXPORT_SYMBOL_GPL(update_time);
+ 
+ /**
+  *	touch_atime	-	update the access time
+Index: debian-kernel/fs/namespace.c
+===================================================================
+--- debian-kernel.orig/fs/namespace.c
++++ debian-kernel/fs/namespace.c
+@@ -431,6 +431,7 @@ void __mnt_drop_write(struct vfsmount *m
+ 	mnt_dec_writers(real_mount(mnt));
+ 	preempt_enable();
+ }
++EXPORT_SYMBOL_GPL(__mnt_drop_write);
+ 
+ /**
+  * mnt_drop_write - give up write access to a mount
+@@ -797,6 +798,7 @@ int is_current_mnt_ns(struct vfsmount *m
+ {
+ 	return check_mnt(real_mount(mnt));
+ }
++EXPORT_SYMBOL_GPL(is_current_mnt_ns);
+ 
+ /*
+  * vfsmount lock must be held for write
+@@ -1961,6 +1963,7 @@ int iterate_mounts(int (*f)(struct vfsmo
+ 	}
+ 	return 0;
+ }
++EXPORT_SYMBOL_GPL(iterate_mounts);
+ 
+ static void lock_mnt_tree(struct mount *mnt)
+ {
+Index: debian-kernel/fs/notify/group.c
+===================================================================
+--- debian-kernel.orig/fs/notify/group.c
++++ debian-kernel/fs/notify/group.c
+@@ -100,6 +100,7 @@ void fsnotify_get_group(struct fsnotify_
+ {
+ 	refcount_inc(&group->refcnt);
+ }
++EXPORT_SYMBOL_GPL(fsnotify_get_group);
+ 
+ /*
+  * Drop a reference to a group.  Free it if it's through.
+Index: debian-kernel/fs/open.c
+===================================================================
+--- debian-kernel.orig/fs/open.c
++++ debian-kernel/fs/open.c
+@@ -65,6 +65,7 @@ int do_truncate(struct dentry *dentry, l
+ 	inode_unlock(dentry->d_inode);
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(do_truncate);
+ 
+ long vfs_truncate(const struct path *path, loff_t length)
+ {
+Index: debian-kernel/fs/read_write.c
+===================================================================
+--- debian-kernel.orig/fs/read_write.c
++++ debian-kernel/fs/read_write.c
+@@ -488,6 +488,7 @@ ssize_t vfs_read(struct file *file, char
+ 	inc_syscr(current);
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(vfs_read);
+ 
+ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
+ {
+@@ -517,6 +518,7 @@ vfs_readf_t vfs_readf(struct file *file)
+ 		return new_sync_read;
+ 	return ERR_PTR(-ENOSYS); /* doesn't have ->read(|_iter)() op */
+ }
++EXPORT_SYMBOL_GPL(vfs_readf);
+ 
+ vfs_writef_t vfs_writef(struct file *file)
+ {
+@@ -528,6 +530,7 @@ vfs_writef_t vfs_writef(struct file *fil
+ 		return new_sync_write;
+ 	return ERR_PTR(-ENOSYS); /* doesn't have ->write(|_iter)() op */
+ }
++EXPORT_SYMBOL_GPL(vfs_writef);
+ 
+ /* caller is responsible for file_start_write/file_end_write */
+ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
+@@ -608,6 +611,7 @@ ssize_t vfs_write(struct file *file, con
+ 	file_end_write(file);
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(vfs_write);
+ 
+ /* file_ppos returns &file->f_pos or NULL if file is stream */
+ static inline loff_t *file_ppos(struct file *file)
+Index: debian-kernel/fs/splice.c
+===================================================================
+--- debian-kernel.orig/fs/splice.c
++++ debian-kernel/fs/splice.c
+@@ -870,6 +870,7 @@ long do_splice_to(struct file *in, loff_
+ 		return in->f_op->splice_read(in, ppos, pipe, len, flags);
+ 	return default_file_splice_read(in, ppos, pipe, len, flags);
+ }
++EXPORT_SYMBOL_GPL(do_splice_from);
+ 
+ /**
+  * splice_direct_to_actor - splices data directly between two non-pipes
+@@ -1016,6 +1017,7 @@ static int direct_splice_actor(struct pi
+ 	return do_splice_from(pipe, file, sd->opos, sd->total_len,
+ 			      sd->flags);
+ }
++EXPORT_SYMBOL_GPL(do_splice_to);
+ 
+ /**
+  * do_splice_direct - splices data directly between two files
+Index: debian-kernel/fs/sync.c
+===================================================================
+--- debian-kernel.orig/fs/sync.c
++++ debian-kernel/fs/sync.c
+@@ -39,6 +39,7 @@ int __sync_filesystem(struct super_block
+ 		sb->s_op->sync_fs(sb, wait);
+ 	return __sync_blockdev(sb->s_bdev, wait);
+ }
++EXPORT_SYMBOL_GPL(__sync_filesystem);
+ 
+ /*
+  * Write out and wait upon all dirty data associated with this
+Index: debian-kernel/fs/xattr.c
+===================================================================
+--- debian-kernel.orig/fs/xattr.c
++++ debian-kernel/fs/xattr.c
+@@ -296,6 +296,7 @@ vfs_getxattr_alloc(struct dentry *dentry
+ 	*xattr_value = value;
+ 	return error;
+ }
++EXPORT_SYMBOL_GPL(vfs_getxattr_alloc);
+ 
+ ssize_t
+ __vfs_getxattr(struct dentry *dentry, struct inode *inode, const char *name,
+Index: debian-kernel/kernel/locking/lockdep.c
+===================================================================
+--- debian-kernel.orig/kernel/locking/lockdep.c
++++ debian-kernel/kernel/locking/lockdep.c
+@@ -190,6 +190,7 @@ inline struct lock_class *lockdep_hlock_
+ 	 */
+ 	return lock_classes + class_idx;
+ }
++EXPORT_SYMBOL_GPL(lockdep_hlock_class);
+ #define hlock_class(hlock) lockdep_hlock_class(hlock)
+ 
+ #ifdef CONFIG_LOCK_STAT
+Index: debian-kernel/kernel/task_work.c
+===================================================================
+--- debian-kernel.orig/kernel/task_work.c
++++ debian-kernel/kernel/task_work.c
+@@ -139,3 +139,4 @@ void task_work_run(void)
+ 		} while (work);
+ 	}
+ }
++EXPORT_SYMBOL_GPL(task_work_run);
+Index: debian-kernel/security/security.c
+===================================================================
+--- debian-kernel.orig/security/security.c
++++ debian-kernel/security/security.c
+@@ -1096,6 +1096,7 @@ int security_path_rmdir(const struct pat
+ 		return 0;
+ 	return call_int_hook(path_rmdir, 0, dir, dentry);
+ }
++EXPORT_SYMBOL_GPL(security_path_rmdir);
+ 
+ int security_path_unlink(const struct path *dir, struct dentry *dentry)
+ {
+@@ -1112,6 +1113,7 @@ int security_path_symlink(const struct p
+ 		return 0;
+ 	return call_int_hook(path_symlink, 0, dir, dentry, old_name);
+ }
++EXPORT_SYMBOL_GPL(security_path_symlink);
+ 
+ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
+ 		       struct dentry *new_dentry)
+@@ -1120,6 +1122,7 @@ int security_path_link(struct dentry *ol
+ 		return 0;
+ 	return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
+ }
++EXPORT_SYMBOL_GPL(security_path_link);
+ 
+ int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
+ 			 const struct path *new_dir, struct dentry *new_dentry,
+@@ -1147,6 +1150,7 @@ int security_path_truncate(const struct
+ 		return 0;
+ 	return call_int_hook(path_truncate, 0, path);
+ }
++EXPORT_SYMBOL_GPL(security_path_truncate);
+ 
+ int security_path_chmod(const struct path *path, umode_t mode)
+ {
+@@ -1154,6 +1158,7 @@ int security_path_chmod(const struct pat
+ 		return 0;
+ 	return call_int_hook(path_chmod, 0, path, mode);
+ }
++EXPORT_SYMBOL_GPL(security_path_chmod);
+ 
+ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+ {
+@@ -1161,6 +1166,7 @@ int security_path_chown(const struct pat
+ 		return 0;
+ 	return call_int_hook(path_chown, 0, path, uid, gid);
+ }
++EXPORT_SYMBOL_GPL(security_path_chown);
+ 
+ int security_path_chroot(const struct path *path)
+ {
+@@ -1261,6 +1267,7 @@ int security_inode_permission(struct ino
+ 		return 0;
+ 	return call_int_hook(inode_permission, 0, inode, mask);
+ }
++EXPORT_SYMBOL_GPL(security_inode_permission);
+ 
+ int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
+ {
+@@ -1453,6 +1460,7 @@ int security_file_permission(struct file
+ 
+ 	return fsnotify_perm(file, mask);
+ }
++EXPORT_SYMBOL_GPL(security_file_permission);
+ 
+ int security_file_alloc(struct file *file)
+ {
diff --git a/debian/patches/features/all/db-mok-keyring/0001-MODSIGN-do-not-load-mok-when-secure-boot-disabled.patch b/debian/patches/features/all/db-mok-keyring/0001-MODSIGN-do-not-load-mok-when-secure-boot-disabled.patch
new file mode 100644
index 000000000..5d4ec82f0
--- /dev/null
+++ b/debian/patches/features/all/db-mok-keyring/0001-MODSIGN-do-not-load-mok-when-secure-boot-disabled.patch
@@ -0,0 +1,40 @@
+From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
+Date: Tue, 13 Mar 2018 18:37:59 +0800
+Subject: [PATCH 1/5] MODSIGN: do not load mok when secure boot disabled
+Origin: https://lore.kernel.org/patchwork/patch/933173/
+
+The mok can not be trusted when the secure boot is disabled. Which
+means that the kernel embedded certificate is the only trusted key.
+
+Due to db/dbx are authenticated variables, they needs manufacturer's
+KEK for update. So db/dbx are secure when secureboot disabled.
+
+Cc: David Howells <dhowells@redhat.com>
+Cc: Josh Boyer <jwboyer@fedoraproject.org>
+Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
+Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com>
+[Rebased by Luca Boccassi]
+[bwh: Forward-ported to 5.5.9:
+ - get_cert_list() takes a pointer to status and returns the cert list
+ - Adjust filename]
+[Salvatore Bonaccorso: Forward-ported to 5.10: Refresh for changes in
+38a1f03aa240 ("integrity: Move import of MokListRT certs to a separate
+routine"). Refresh in context for change in ebd9c2ae369a ("integrity: Load mokx
+variables into the blacklist keyring")]
+---
+ security/integrity/platform_certs/load_uefi.c | 26 +++++++++++++++-----------
+ 1 file changed, 15 insertions(+), 11 deletions(-)
+
+--- a/security/integrity/platform_certs/load_uefi.c
++++ b/security/integrity/platform_certs/load_uefi.c
+@@ -176,6 +176,10 @@ static int __init load_uefi_certs(void)
+ 		kfree(dbx);
+ 	}
+ 
++	/* the MOK can not be trusted when secure boot is disabled */
++	if (!efi_enabled(EFI_SECURE_BOOT))
++		return 0;
++
+ 	mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status);
+ 	if (!mokx) {
+ 		if (status == EFI_NOT_FOUND)
diff --git a/debian/patches/features/all/db-mok-keyring/0003-MODSIGN-checking-the-blacklisted-hash-before-loading-a-kernel-module.patch b/debian/patches/features/all/db-mok-keyring/0003-MODSIGN-checking-the-blacklisted-hash-before-loading-a-kernel-module.patch
new file mode 100644
index 000000000..a7ec5ccb5
--- /dev/null
+++ b/debian/patches/features/all/db-mok-keyring/0003-MODSIGN-checking-the-blacklisted-hash-before-loading-a-kernel-module.patch
@@ -0,0 +1,117 @@
+From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
+Date: Tue, 13 Mar 2018 18:38:02 +0800
+Subject: [PATCH 3/4] MODSIGN: checking the blacklisted hash before loading a
+ kernel module
+Origin: https://lore.kernel.org/patchwork/patch/933175/
+
+This patch adds the logic for checking the kernel module's hash
+base on blacklist. The hash must be generated by sha256 and enrolled
+to dbx/mokx.
+
+For example:
+	sha256sum sample.ko
+	mokutil --mokx --import-hash $HASH_RESULT
+
+Whether the signature on ko file is stripped or not, the hash can be
+compared by kernel.
+
+Cc: David Howells <dhowells@redhat.com>
+Cc: Josh Boyer <jwboyer@fedoraproject.org>
+Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
+Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com>
+[Rebased by Luca Boccassi]
+---
+ kernel/module_signing.c | 59 +++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 57 insertions(+), 2 deletions(-)
+
+--- a/kernel/module_signing.c
++++ b/kernel/module_signing.c
+@@ -12,15 +12,62 @@
+ #include <linux/string.h>
+ #include <linux/verification.h>
+ #include <crypto/public_key.h>
++#include <crypto/hash.h>
++#include <keys/system_keyring.h>
+ #include "module-internal.h"
+ 
++static int mod_is_hash_blacklisted(const void *mod, size_t verifylen)
++{
++	struct crypto_shash *tfm;
++	struct shash_desc *desc;
++	size_t digest_size, desc_size;
++	u8 *digest;
++	int ret = 0;
++
++	tfm = crypto_alloc_shash("sha256", 0, 0);
++	if (IS_ERR(tfm))
++		goto error_return;
++
++	desc_size = crypto_shash_descsize(tfm) + sizeof(*desc);
++	digest_size = crypto_shash_digestsize(tfm);
++	digest = kzalloc(digest_size + desc_size, GFP_KERNEL);
++	if (!digest) {
++		pr_err("digest memory buffer allocate fail\n");
++		ret = -ENOMEM;
++		goto error_digest;
++	}
++	desc = (void *)digest + digest_size;
++	desc->tfm = tfm;
++	ret = crypto_shash_init(desc);
++	if (ret < 0)
++		goto error_shash;
++
++	ret = crypto_shash_finup(desc, mod, verifylen, digest);
++	if (ret < 0)
++		goto error_shash;
++
++	pr_debug("%ld digest: %*phN\n", verifylen, (int) digest_size, digest);
++
++	ret = is_hash_blacklisted(digest, digest_size, "bin");
++	if (ret == -EKEYREJECTED)
++		pr_err("Module hash %*phN is blacklisted\n",
++		       (int) digest_size, digest);
++
++error_shash:
++	kfree(digest);
++error_digest:
++	crypto_free_shash(tfm);
++error_return:
++	return ret;
++}
++
+ /*
+  * Verify the signature on a module.
+  */
+ int mod_verify_sig(const void *mod, struct load_info *info)
+ {
+ 	struct module_signature ms;
+-	size_t sig_len, modlen = info->len;
++	size_t sig_len, modlen = info->len, wholelen;
+ 	int ret;
+ 
+ 	pr_devel("==>%s(,%zu)\n", __func__, modlen);
+@@ -28,6 +75,7 @@ int mod_verify_sig(const void *mod, stru
+ 	if (modlen <= sizeof(ms))
+ 		return -EBADMSG;
+ 
++	wholelen = modlen + sizeof(MODULE_SIG_STRING) - 1;
+ 	memcpy(&ms, mod + (modlen - sizeof(ms)), sizeof(ms));
+ 
+ 	ret = mod_check_sig(&ms, modlen, "module");
+@@ -38,8 +86,15 @@ int mod_verify_sig(const void *mod, stru
+ 	modlen -= sig_len + sizeof(ms);
+ 	info->len = modlen;
+ 
+-	return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
++	ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+ 				      VERIFY_USE_SECONDARY_KEYRING,
+ 				      VERIFYING_MODULE_SIGNATURE,
+ 				      NULL, NULL);
++	pr_devel("verify_pkcs7_signature() = %d\n", ret);
++
++	/* checking hash of module is in blacklist */
++	if (!ret)
++		ret = mod_is_hash_blacklisted(mod, wholelen);
++
++	return ret;
+ }
diff --git a/debian/patches/features/all/db-mok-keyring/0004-MODSIGN-check-the-attributes-of-db-and-mok.patch b/debian/patches/features/all/db-mok-keyring/0004-MODSIGN-check-the-attributes-of-db-and-mok.patch
new file mode 100644
index 000000000..530885944
--- /dev/null
+++ b/debian/patches/features/all/db-mok-keyring/0004-MODSIGN-check-the-attributes-of-db-and-mok.patch
@@ -0,0 +1,113 @@
+From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
+Date: Tue, 13 Mar 2018 18:38:03 +0800
+Subject: [PATCH 4/4] MODSIGN: check the attributes of db and mok
+Origin: https://lore.kernel.org/patchwork/patch/933176/
+
+That's better for checking the attributes of db and mok variables
+before loading certificates to kernel keyring.
+
+For db and dbx, both of them are authenticated variables. Which
+means that they can only be modified by manufacturer's key. So
+the kernel should checks EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
+attribute before we trust it.
+
+For mok-rt and mokx-rt, both of them are created by shim boot loader
+to forward the mok/mokx content to runtime. They must be runtime-volatile
+variables. So kernel should checks that the attributes map did not set
+EFI_VARIABLE_NON_VOLATILE bit before we trust it.
+
+Cc: David Howells <dhowells@redhat.com>
+Cc: Josh Boyer <jwboyer@fedoraproject.org>
+Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
+Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com>
+[Rebased by Luca Boccassi]
+[bwh: Forward-ported to 5.5.9:
+ - get_cert_list() takes a pointer to status and returns the cert list
+ - Adjust filename, context]
+[bwh: Forward-ported to 5.10: MokListRT and MokListXRT are now both
+ loaded through a single code path.]
+---
+ security/integrity/platform_certs/load_uefi.c | 27 ++++++++++++++-----
+ 1 file changed, 21 insertions(+), 6 deletions(-)
+
+--- a/security/integrity/platform_certs/load_uefi.c
++++ b/security/integrity/platform_certs/load_uefi.c
+@@ -35,11 +35,13 @@ static __init bool uefi_check_ignore_db(
+  * Get a certificate list blob from the named EFI variable.
+  */
+ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
+-				  unsigned long *size, efi_status_t *status)
++				  unsigned long *size, efi_status_t *status,
++				  u32 pos_attr, u32 neg_attr)
+ {
+ 	unsigned long lsize = 4;
+ 	unsigned long tmpdb[4];
+ 	void *db;
++	u32 attr = 0;
+ 
+ 	*status = efi.get_variable(name, guid, NULL, &lsize, &tmpdb);
+ 	if (*status == EFI_NOT_FOUND)
+@@ -54,13 +56,22 @@ static __init void *get_cert_list(efi_ch
+ 	if (!db)
+ 		return NULL;
+ 
+-	*status = efi.get_variable(name, guid, NULL, &lsize, db);
++	*status = efi.get_variable(name, guid, &attr, &lsize, db);
+ 	if (*status != EFI_SUCCESS) {
+ 		kfree(db);
+ 		pr_err("Error reading db var: 0x%lx\n", *status);
+ 		return NULL;
+ 	}
+ 
++	/* must have positive attributes and no negative attributes */
++	if ((pos_attr && !(attr & pos_attr)) ||
++	    (neg_attr && (attr & neg_attr))) {
++		kfree(db);
++		pr_err("Error reading db var attributes: 0x%016x\n", attr);
++		*status = EFI_SECURITY_VIOLATION;
++		return NULL;
++	}
++
+ 	*size = lsize;
+ 	return db;
+ }
+@@ -106,7 +117,8 @@ static int __init load_moklist_certs(voi
+ 	/* Get MokListRT. It might not exist, so it isn't an error
+ 	 * if we can't get it.
+ 	 */
+-	mok = get_cert_list(L"MokListRT", &mok_var, &moksize, &status);
++	mok = get_cert_list(L"MokListRT", &mok_var, &moksize, &status,
++				0, EFI_VARIABLE_NON_VOLATILE);
+ 	if (mok) {
+ 		rc = parse_efi_signature_list("UEFI:MokListRT",
+ 					      mok, moksize, get_handler_for_db);
+@@ -145,7 +157,8 @@ static int __init load_uefi_certs(void)
+ 	 * if we can't get them.
+ 	 */
+ 	if (!uefi_check_ignore_db()) {
+-		db = get_cert_list(L"db", &secure_var, &dbsize, &status);
++		db = get_cert_list(L"db", &secure_var, &dbsize, &status,
++			EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, 0);
+ 		if (!db) {
+ 			if (status == EFI_NOT_FOUND)
+ 				pr_debug("MODSIGN: db variable wasn't found\n");
+@@ -161,7 +174,8 @@ static int __init load_uefi_certs(void)
+ 		}
+ 	}
+ 
+-	dbx = get_cert_list(L"dbx", &secure_var, &dbxsize, &status);
++	dbx = get_cert_list(L"dbx", &secure_var, &dbxsize, &status,
++		EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, 0);
+ 	if (!dbx) {
+ 		if (status == EFI_NOT_FOUND)
+ 			pr_debug("dbx variable wasn't found\n");
+@@ -180,7 +194,8 @@ static int __init load_uefi_certs(void)
+ 	if (!efi_enabled(EFI_SECURE_BOOT))
+ 		return 0;
+ 
+-	mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status);
++	mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status,
++							0, EFI_VARIABLE_NON_VOLATILE);
+ 	if (!mokx) {
+ 		if (status == EFI_NOT_FOUND)
+ 			pr_debug("mokx variable wasn't found\n");
diff --git a/debian/patches/features/all/db-mok-keyring/KEYS-Make-use-of-platform-keyring-for-module-signature.patch b/debian/patches/features/all/db-mok-keyring/KEYS-Make-use-of-platform-keyring-for-module-signature.patch
new file mode 100644
index 000000000..f00bf3d24
--- /dev/null
+++ b/debian/patches/features/all/db-mok-keyring/KEYS-Make-use-of-platform-keyring-for-module-signature.patch
@@ -0,0 +1,37 @@
+From: Robert Holmes <robeholmes@gmail.com>
+Date: Tue, 23 Apr 2019 07:39:29 +0000
+Subject: [PATCH] KEYS: Make use of platform keyring for module signature
+ verify
+Bug-Debian: https://bugs.debian.org/935945
+Origin: https://src.fedoraproject.org/rpms/kernel/raw/master/f/KEYS-Make-use-of-platform-keyring-for-module-signature.patch
+
+This patch completes commit 278311e417be ("kexec, KEYS: Make use of
+platform keyring for signature verify") which, while adding the
+platform keyring for bzImage verification, neglected to also add
+this keyring for module verification.
+
+As such, kernel modules signed with keys from the MokList variable
+were not successfully verified.
+
+Signed-off-by: Robert Holmes <robeholmes@gmail.com>
+Signed-off-by: Jeremy Cline <jcline@redhat.com>
+---
+ kernel/module_signing.c | 16 ++++++++++++----
+ 1 file changed, 12 insertions(+), 4 deletions(-)
+
+--- a/kernel/module_signing.c
++++ b/kernel/module_signing.c
+@@ -135,6 +135,13 @@ int mod_verify_sig(const void *mod, stru
+ 				      VERIFYING_MODULE_SIGNATURE,
+ 				      NULL, NULL);
+ 	pr_devel("verify_pkcs7_signature() = %d\n", ret);
++	if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
++		ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
++				VERIFY_USE_PLATFORM_KEYRING,
++				VERIFYING_MODULE_SIGNATURE,
++				NULL, NULL);
++                pr_devel("verify_pkcs7_signature() = %d\n", ret);
++	}
+ 
+ 	/* checking hash of module is in blacklist */
+ 	if (!ret)
diff --git a/debian/patches/features/all/db-mok-keyring/modsign-make-shash-allocation-failure-fatal.patch b/debian/patches/features/all/db-mok-keyring/modsign-make-shash-allocation-failure-fatal.patch
new file mode 100644
index 000000000..2ae3ddde4
--- /dev/null
+++ b/debian/patches/features/all/db-mok-keyring/modsign-make-shash-allocation-failure-fatal.patch
@@ -0,0 +1,28 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Sun, 05 May 2019 13:45:06 +0100
+Subject: MODSIGN: Make shash allocation failure fatal
+
+mod_is_hash_blacklisted() currently returns 0 (suceess) if
+crypto_alloc_shash() fails.  This should instead be a fatal error,
+so unwrap and pass up the error code.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+--- a/kernel/module_signing.c
++++ b/kernel/module_signing.c
+@@ -51,11 +51,13 @@ static int mod_is_hash_blacklisted(const
+ 	struct shash_desc *desc;
+ 	size_t digest_size, desc_size;
+ 	u8 *digest;
+-	int ret = 0;
++	int ret;
+ 
+ 	tfm = crypto_alloc_shash("sha256", 0, 0);
+-	if (IS_ERR(tfm))
++	if (IS_ERR(tfm)) {
++		ret = PTR_ERR(tfm);
+ 		goto error_return;
++	}
+ 
+ 	desc_size = crypto_shash_descsize(tfm) + sizeof(*desc);
+ 	digest_size = crypto_shash_digestsize(tfm);
diff --git a/debian/patches/features/all/drivers-media-dvb-usb-af9005-request_firmware.patch b/debian/patches/features/all/drivers-media-dvb-usb-af9005-request_firmware.patch
new file mode 100644
index 000000000..a24ba17ef
--- /dev/null
+++ b/debian/patches/features/all/drivers-media-dvb-usb-af9005-request_firmware.patch
@@ -0,0 +1,149 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Mon, 24 Aug 2009 23:19:58 +0100
+Subject: af9005: Use request_firmware() to load register init script
+Forwarded: no
+
+Read the register init script from the Windows driver.  This is sick
+but should avoid the potential copyright infringement in distributing
+a version of the script which is directly derived from the driver.
+---
+ drivers/media/dvb/dvb-usb/Kconfig     |    2 +-
+ drivers/media/dvb/dvb-usb/af9005-fe.c |   66 ++++++++++++++++++++++++++------
+ 2 files changed, 54 insertions(+), 14 deletions(-)
+
+Index: debian-kernel/drivers/media/usb/dvb-usb/Kconfig
+===================================================================
+--- debian-kernel.orig/drivers/media/usb/dvb-usb/Kconfig
++++ debian-kernel/drivers/media/usb/dvb-usb/Kconfig
+@@ -260,10 +260,10 @@ config DVB_USB_OPERA1
+ 
+ config DVB_USB_AF9005
+ 	tristate "Afatech AF9005 DVB-T USB1.1 support"
+-	depends on BROKEN
+ 	depends on DVB_USB
+ 	select MEDIA_TUNER_MT2060 if MEDIA_SUBDRV_AUTOSELECT
+ 	select MEDIA_TUNER_QT1010 if MEDIA_SUBDRV_AUTOSELECT
++	select FW_LOADER
+ 	help
+ 	  Say Y here to support the Afatech AF9005 based DVB-T USB1.1 receiver
+ 	  and the TerraTec Cinergy T USB XE (Rev.1)
+Index: debian-kernel/drivers/media/usb/dvb-usb/af9005-fe.c
+===================================================================
+--- debian-kernel.orig/drivers/media/usb/dvb-usb/af9005-fe.c
++++ debian-kernel/drivers/media/usb/dvb-usb/af9005-fe.c
+@@ -9,10 +9,26 @@
+  * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
+  */
+ #include "af9005.h"
+-#include "af9005-script.h"
+ #include "mt2060.h"
+ #include "qt1010.h"
+ #include <asm/div64.h>
++#include <linux/firmware.h>
++
++/* Register initialisation script to be extracted from the Windows driver */
++
++typedef struct {
++	__le16 reg;
++	u8 pos;
++	u8 len;
++	u8 val;
++	u8 pad;
++} __packed RegDesc;
++
++#define WIN_DRV_NAME		"AF05BDA.sys"
++#define WIN_DRV_VERSION		"6.3.2.1"
++#define WIN_DRV_SIZE		133504
++#define WIN_DRV_SCRIPT_OFFSET	88316
++#define WIN_DRV_SCRIPT_SIZE	1110
+ 
+ struct af9005_fe_state {
+ 	struct dvb_usb_device *d;
+@@ -804,6 +820,8 @@ static int af9005_fe_init(struct dvb_fro
+ {
+ 	struct af9005_fe_state *state = fe->demodulator_priv;
+ 	struct dvb_usb_adapter *adap = fe->dvb->priv;
++	const struct firmware *fw;
++	const RegDesc *script;
+ 	int ret, i, scriptlen;
+ 	u8 temp, temp0 = 0, temp1 = 0, temp2 = 0;
+ 	u8 buf[2];
+@@ -956,37 +974,55 @@ static int af9005_fe_init(struct dvb_fro
+ 	if ((ret = af9005_write_ofdm_register(state->d, 0xaefb, 0x01)))
+ 		return ret;
+ 
+-	/* load init script */
+-	deb_info("load init script\n");
+-	scriptlen = sizeof(script) / sizeof(RegDesc);
++	/* load and validate init script */
++	deb_info("load init script from Windows driver\n");
++	ret = request_firmware(&fw, WIN_DRV_NAME, &state->d->udev->dev);
++	if (ret)
++		return ret;
++	BUILD_BUG_ON(sizeof(RegDesc) != 6);
++	if (fw->size != WIN_DRV_SIZE ||
++	    memcmp(fw->data + WIN_DRV_SCRIPT_OFFSET,
++		   "\x80\xa1\x00\x08\x0a\x00", 6) ||
++	    memcmp(fw->data + WIN_DRV_SCRIPT_OFFSET + WIN_DRV_SCRIPT_SIZE - 6,
++		   "\x49\xa3\x00\x06\x02\x00", 6)) {
++		err("%s is invalid - should be version %s, size %u bytes\n",
++		    WIN_DRV_NAME, WIN_DRV_VERSION, WIN_DRV_SIZE);
++		ret = -EINVAL;
++		goto fail_release;
++	}
++
++	script = (const RegDesc *)(fw->data + WIN_DRV_SCRIPT_OFFSET);
++	scriptlen = WIN_DRV_SCRIPT_SIZE / sizeof(RegDesc);
+ 	for (i = 0; i < scriptlen; i++) {
++		u16 reg = le16_to_cpu(script[i].reg);
+ 		if ((ret =
+-		     af9005_write_register_bits(state->d, script[i].reg,
++		     af9005_write_register_bits(state->d, reg,
+ 						script[i].pos,
+ 						script[i].len, script[i].val)))
+-			return ret;
++			goto fail_release;
+ 		/* save 3 bytes of original fcw */
+-		if (script[i].reg == 0xae18)
++		if (reg == 0xae18)
+ 			temp2 = script[i].val;
+-		if (script[i].reg == 0xae19)
++		if (reg == 0xae19)
+ 			temp1 = script[i].val;
+-		if (script[i].reg == 0xae1a)
++		if (reg == 0xae1a)
+ 			temp0 = script[i].val;
+ 
+ 		/* save original unplug threshold */
+-		if (script[i].reg == xd_p_reg_unplug_th)
++		if (reg == xd_p_reg_unplug_th)
+ 			state->original_if_unplug_th = script[i].val;
+-		if (script[i].reg == xd_p_reg_unplug_rf_gain_th)
++		if (reg == xd_p_reg_unplug_rf_gain_th)
+ 			state->original_rf_unplug_th = script[i].val;
+-		if (script[i].reg == xd_p_reg_unplug_dtop_if_gain_th)
++		if (reg == xd_p_reg_unplug_dtop_if_gain_th)
+ 			state->original_dtop_if_unplug_th = script[i].val;
+-		if (script[i].reg == xd_p_reg_unplug_dtop_rf_gain_th)
++		if (reg == xd_p_reg_unplug_dtop_rf_gain_th)
+ 			state->original_dtop_rf_unplug_th = script[i].val;
+ 
+ 	}
+ 	state->original_fcw =
+ 	    ((u32) temp2 << 16) + ((u32) temp1 << 8) + (u32) temp0;
+ 
++	release_firmware(fw);
+ 
+ 	/* save original TOPs */
+ 	deb_info("save original TOPs\n");
+@@ -1066,6 +1102,10 @@ static int af9005_fe_init(struct dvb_fro
+ 
+ 	deb_info("profit!\n");
+ 	return 0;
++
++fail_release:
++	release_firmware(fw);
++	return ret;
+ }
+ 
+ static int af9005_fe_sleep(struct dvb_frontend *fe)
diff --git a/debian/patches/features/all/lockdown/arm64-add-kernel-config-option-to-lock-down-when.patch b/debian/patches/features/all/lockdown/arm64-add-kernel-config-option-to-lock-down-when.patch
new file mode 100644
index 000000000..7f9ee1cf9
--- /dev/null
+++ b/debian/patches/features/all/lockdown/arm64-add-kernel-config-option-to-lock-down-when.patch
@@ -0,0 +1,153 @@
+From: Linn Crosetto <linn@hpe.com>
+Date: Tue, 30 Aug 2016 11:54:38 -0600
+Subject: arm64: add kernel config option to lock down when in Secure Boot mode
+Bug-Debian: https://bugs.debian.org/831827
+Forwarded: no
+
+Add a kernel configuration option to lock down the kernel, to restrict
+userspace's ability to modify the running kernel when UEFI Secure Boot is
+enabled. Based on the x86 patch by Matthew Garrett.
+
+Determine the state of Secure Boot in the EFI stub and pass this to the
+kernel using the FDT.
+
+Signed-off-by: Linn Crosetto <linn@hpe.com>
+[bwh: Forward-ported to 4.10: adjust context]
+[Lukas Wunner: Forward-ported to 4.11: drop parts applied upstream]
+[bwh: Forward-ported to 4.15 and lockdown patch set:
+ - Pass result of efi_get_secureboot() in stub through to
+   efi_set_secure_boot() in main kernel
+ - Use lockdown API and naming]
+[bwh: Forward-ported to 4.19.3: adjust context in update_fdt()]
+[dannf: Moved init_lockdown() call after uefi_init(), fixing SB detection]
+[bwh: Drop call to init_lockdown(), as efi_set_secure_boot() now calls this]
+[bwh: Forward-ported to 5.6: efi_get_secureboot() no longer takes a
+ sys_table parameter]
+[bwh: Forward-ported to 5.7: EFI initialisation from FDT was rewritten, so:
+ - Add Secure Boot mode to the parameter enumeration in fdtparams.c
+ - Add a parameter to efi_get_fdt_params() to return the Secure Boot mode
+ - Since Xen does not have a property name defined for Secure Boot mode,
+   change efi_get_fdt_prop() to handle a missing property name by clearing
+   the output variable]
+[Salvatore Bonaccorso: Forward-ported to 5.10: f30f242fb131 ("efi: Rename
+arm-init to efi-init common for all arch") renamed arm-init.c to efi-init.c]
+---
+ drivers/firmware/efi/efi-init.c    |    5 ++++-
+ drivers/firmware/efi/fdtparams.c   |   12 +++++++++++-
+ drivers/firmware/efi/libstub/fdt.c |    6 ++++++
+ include/linux/efi.h                |    3 ++-
+ 4 files changed, 23 insertions(+), 3 deletions(-)
+
+--- a/drivers/firmware/efi/efi-init.c
++++ b/drivers/firmware/efi/efi-init.c
+@@ -210,9 +210,10 @@ void __init efi_init(void)
+ {
+ 	struct efi_memory_map_data data;
+ 	u64 efi_system_table;
++	u32 secure_boot;
+ 
+ 	/* Grab UEFI information placed in FDT by stub */
+-	efi_system_table = efi_get_fdt_params(&data);
++	efi_system_table = efi_get_fdt_params(&data, &secure_boot);
+ 	if (!efi_system_table)
+ 		return;
+ 
+@@ -234,6 +235,8 @@ void __init efi_init(void)
+ 		return;
+ 	}
+ 
++	efi_set_secure_boot(secure_boot);
++
+ 	reserve_regions();
+ 	efi_esrt_init();
+ 	efi_mokvar_table_init();
+--- a/drivers/firmware/efi/fdtparams.c
++++ b/drivers/firmware/efi/fdtparams.c
+@@ -16,6 +16,7 @@ enum {
+ 	MMSIZE,
+ 	DCSIZE,
+ 	DCVERS,
++	SBMODE,
+ 
+ 	PARAMCOUNT
+ };
+@@ -26,6 +27,7 @@ static __initconst const char name[][22]
+ 	[MMSIZE] = "MemMap Size          ",
+ 	[DCSIZE] = "MemMap Desc. Size    ",
+ 	[DCVERS] = "MemMap Desc. Version ",
++	[SBMODE] = "Secure Boot Enabled  ",
+ };
+ 
+ static __initconst const struct {
+@@ -41,6 +43,7 @@ static __initconst const struct {
+ 			[MMSIZE] = "xen,uefi-mmap-size",
+ 			[DCSIZE] = "xen,uefi-mmap-desc-size",
+ 			[DCVERS] = "xen,uefi-mmap-desc-ver",
++			[SBMODE] = "",
+ 		}
+ 	}, {
+ #endif
+@@ -51,6 +54,7 @@ static __initconst const struct {
+ 			[MMSIZE] = "linux,uefi-mmap-size",
+ 			[DCSIZE] = "linux,uefi-mmap-desc-size",
+ 			[DCVERS] = "linux,uefi-mmap-desc-ver",
++			[SBMODE] = "linux,uefi-secure-boot",
+ 		}
+ 	}
+ };
+@@ -62,6 +66,11 @@ static int __init efi_get_fdt_prop(const
+ 	int len;
+ 	u64 val;
+ 
++	if (!pname[0]) {
++		memset(var, 0, size);
++		return 0;
++	}
++
+ 	prop = fdt_getprop(fdt, node, pname, &len);
+ 	if (!prop)
+ 		return 1;
+@@ -79,7 +88,7 @@ static int __init efi_get_fdt_prop(const
+ 	return 0;
+ }
+ 
+-u64 __init efi_get_fdt_params(struct efi_memory_map_data *mm)
++u64 __init efi_get_fdt_params(struct efi_memory_map_data *mm, u32 *secure_boot)
+ {
+ 	const void *fdt = initial_boot_params;
+ 	unsigned long systab;
+@@ -93,6 +102,7 @@ u64 __init efi_get_fdt_params(struct efi
+ 		[MMSIZE] = { &mm->size,		sizeof(mm->size) },
+ 		[DCSIZE] = { &mm->desc_size,	sizeof(mm->desc_size) },
+ 		[DCVERS] = { &mm->desc_version,	sizeof(mm->desc_version) },
++		[SBMODE] = { secure_boot,       sizeof(*secure_boot) },
+ 	};
+ 
+ 	BUILD_BUG_ON(ARRAY_SIZE(target) != ARRAY_SIZE(name));
+--- a/drivers/firmware/efi/libstub/fdt.c
++++ b/drivers/firmware/efi/libstub/fdt.c
+@@ -148,6 +148,12 @@ static efi_status_t update_fdt(void *ori
+ 		}
+ 	}
+ 
++	fdt_val32 = cpu_to_fdt32(efi_get_secureboot());
++	status = fdt_setprop(fdt, node, "linux,uefi-secure-boot",
++			     &fdt_val32, sizeof(fdt_val32));
++	if (status)
++		goto fdt_set_fail;
++
+ 	/* Shrink the FDT back to its minimum size: */
+ 	fdt_pack(fdt);
+ 
+--- a/include/linux/efi.h
++++ b/include/linux/efi.h
+@@ -665,7 +665,8 @@ extern void efi_mem_reserve(phys_addr_t
+ extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
+ extern void efi_initialize_iomem_resources(struct resource *code_resource,
+ 		struct resource *data_resource, struct resource *bss_resource);
+-extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
++extern u64 efi_get_fdt_params(struct efi_memory_map_data *data,
++			      u32 *secure_boot);
+ extern struct kobject *efi_kobj;
+ 
+ extern int efi_reboot_quirk_mode;
diff --git a/debian/patches/features/all/lockdown/efi-add-an-efi_secure_boot-flag-to-indicate-secure-b.patch b/debian/patches/features/all/lockdown/efi-add-an-efi_secure_boot-flag-to-indicate-secure-b.patch
new file mode 100644
index 000000000..431281249
--- /dev/null
+++ b/debian/patches/features/all/lockdown/efi-add-an-efi_secure_boot-flag-to-indicate-secure-b.patch
@@ -0,0 +1,152 @@
+From: David Howells <dhowells@redhat.com>
+Date: Mon, 18 Feb 2019 12:45:03 +0000
+Subject: [28/30] efi: Add an EFI_SECURE_BOOT flag to indicate secure boot mode
+Origin: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit?id=a5d70c55c603233c192b375f72116a395909da28
+
+UEFI machines can be booted in Secure Boot mode.  Add an EFI_SECURE_BOOT
+flag that can be passed to efi_enabled() to find out whether secure boot is
+enabled.
+
+Move the switch-statement in x86's setup_arch() that inteprets the
+secure_boot boot parameter to generic code and set the bit there.
+
+Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+Signed-off-by: David Howells <dhowells@redhat.com>
+Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+cc: linux-efi@vger.kernel.org
+[rperier: Forward-ported to 5.5:
+ - Use pr_warn()
+ - Adjust context]
+[bwh: Forward-ported to 5.6: adjust context]
+[bwh: Forward-ported to 5.7:
+ - Use the next available bit in efi.flags
+ - Adjust context]
+---
+ arch/x86/kernel/setup.c           | 14 +----------
+ drivers/firmware/efi/Makefile     |  1 +
+ drivers/firmware/efi/secureboot.c | 39 +++++++++++++++++++++++++++++++
+ include/linux/efi.h               | 16 ++++++++-----
+ 4 files changed, 51 insertions(+), 19 deletions(-)
+ create mode 100644 drivers/firmware/efi/secureboot.c
+
+--- a/arch/x86/kernel/setup.c
++++ b/arch/x86/kernel/setup.c
+@@ -1124,19 +1124,7 @@ void __init setup_arch(char **cmdline_p)
+ 	/* Allocate bigger log buffer */
+ 	setup_log_buf(1);
+ 
+-	if (efi_enabled(EFI_BOOT)) {
+-		switch (boot_params.secure_boot) {
+-		case efi_secureboot_mode_disabled:
+-			pr_info("Secure boot disabled\n");
+-			break;
+-		case efi_secureboot_mode_enabled:
+-			pr_info("Secure boot enabled\n");
+-			break;
+-		default:
+-			pr_info("Secure boot could not be determined\n");
+-			break;
+-		}
+-	}
++	efi_set_secure_boot(boot_params.secure_boot);
+ 
+ 	reserve_initrd();
+ 
+--- a/drivers/firmware/efi/Makefile
++++ b/drivers/firmware/efi/Makefile
+@@ -25,6 +25,7 @@ obj-$(CONFIG_EFI_FAKE_MEMMAP)		+= fake_m
+ obj-$(CONFIG_EFI_BOOTLOADER_CONTROL)	+= efibc.o
+ obj-$(CONFIG_EFI_TEST)			+= test/
+ obj-$(CONFIG_EFI_DEV_PATH_PARSER)	+= dev-path-parser.o
++obj-$(CONFIG_EFI)			+= secureboot.o
+ obj-$(CONFIG_APPLE_PROPERTIES)		+= apple-properties.o
+ obj-$(CONFIG_EFI_RCI2_TABLE)		+= rci2-table.o
+ obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE)	+= embedded-firmware.o
+--- /dev/null
++++ b/drivers/firmware/efi/secureboot.c
+@@ -0,0 +1,39 @@
++
++/* Core kernel secure boot support.
++ *
++ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
++ * Written by David Howells (dhowells@redhat.com)
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public Licence
++ * as published by the Free Software Foundation; either version
++ * 2 of the Licence, or (at your option) any later version.
++ */
++
++#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
++
++#include <linux/efi.h>
++#include <linux/kernel.h>
++#include <linux/printk.h>
++
++/*
++ * Decide what to do when UEFI secure boot mode is enabled.
++ */
++void __init efi_set_secure_boot(enum efi_secureboot_mode mode)
++{
++	if (efi_enabled(EFI_BOOT)) {
++		switch (mode) {
++		case efi_secureboot_mode_disabled:
++			pr_info("Secure boot disabled\n");
++			break;
++		case efi_secureboot_mode_enabled:
++			set_bit(EFI_SECURE_BOOT, &efi.flags);
++			pr_info("Secure boot enabled\n");
++			break;
++		default:
++			pr_warn("Secure boot could not be determined (mode %u)\n",
++				mode);
++			break;
++		}
++	}
++}
+--- a/include/linux/efi.h
++++ b/include/linux/efi.h
+@@ -776,6 +776,14 @@ extern int __init efi_setup_pcdp_console
+ #define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
+ #define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
+ #define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */
++#define EFI_SECURE_BOOT		13	/* Are we in Secure Boot mode? */
++
++enum efi_secureboot_mode {
++	efi_secureboot_mode_unset,
++	efi_secureboot_mode_unknown,
++	efi_secureboot_mode_disabled,
++	efi_secureboot_mode_enabled,
++};
+ 
+ #ifdef CONFIG_EFI
+ /*
+@@ -799,6 +807,7 @@ static inline bool efi_rt_services_suppo
+ {
+ 	return (efi.runtime_supported_mask & mask) == mask;
+ }
++extern void __init efi_set_secure_boot(enum efi_secureboot_mode mode);
+ #else
+ static inline bool efi_enabled(int feature)
+ {
+@@ -822,6 +831,7 @@ static inline bool efi_rt_services_suppo
+ {
+ 	return false;
+ }
++static inline void efi_set_secure_boot(enum efi_secureboot_mode mode) {}
+ #endif
+ 
+ extern int efi_status_to_err(efi_status_t status);
+@@ -1083,12 +1093,6 @@ static inline bool efi_runtime_disabled(
+ extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
+ extern unsigned long efi_call_virt_save_flags(void);
+ 
+-enum efi_secureboot_mode {
+-	efi_secureboot_mode_unset,
+-	efi_secureboot_mode_unknown,
+-	efi_secureboot_mode_disabled,
+-	efi_secureboot_mode_enabled,
+-};
+ enum efi_secureboot_mode efi_get_secureboot(void);
+ 
+ #ifdef CONFIG_RESET_ATTACK_MITIGATION
diff --git a/debian/patches/features/all/lockdown/efi-lock-down-the-kernel-if-booted-in-secure-boot-mo.patch b/debian/patches/features/all/lockdown/efi-lock-down-the-kernel-if-booted-in-secure-boot-mo.patch
new file mode 100644
index 000000000..627e37154
--- /dev/null
+++ b/debian/patches/features/all/lockdown/efi-lock-down-the-kernel-if-booted-in-secure-boot-mo.patch
@@ -0,0 +1,127 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Tue, 10 Sep 2019 11:54:28 +0100
+Subject: efi: Lock down the kernel if booted in secure boot mode
+
+Based on an earlier patch by David Howells, who wrote the following
+description:
+
+> UEFI Secure Boot provides a mechanism for ensuring that the firmware will
+> only load signed bootloaders and kernels.  Certain use cases may also
+> require that all kernel modules also be signed.  Add a configuration option
+> that to lock down the kernel - which includes requiring validly signed
+> modules - if the kernel is secure-booted.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+ arch/x86/kernel/setup.c           |    4 ++--
+ drivers/firmware/efi/secureboot.c |    3 +++
+ include/linux/security.h          |    6 ++++++
+ security/lockdown/Kconfig         |   15 +++++++++++++++
+ security/lockdown/lockdown.c      |    2 +-
+ 5 files changed, 27 insertions(+), 3 deletions(-)
+
+Index: debian-kernel/arch/x86/kernel/setup.c
+===================================================================
+--- debian-kernel.orig/arch/x86/kernel/setup.c
++++ debian-kernel/arch/x86/kernel/setup.c
+@@ -979,6 +979,8 @@ void __init setup_arch(char **cmdline_p)
+ 	if (efi_enabled(EFI_BOOT))
+ 		efi_init();
+ 
++	efi_set_secure_boot(boot_params.secure_boot);
++
+ 	dmi_setup();
+ 
+ 	/*
+@@ -1130,8 +1132,6 @@ void __init setup_arch(char **cmdline_p)
+ 	/* Allocate bigger log buffer */
+ 	setup_log_buf(1);
+ 
+-	efi_set_secure_boot(boot_params.secure_boot);
+-
+ 	reserve_initrd();
+ 
+ 	acpi_table_upgrade();
+Index: debian-kernel/drivers/firmware/efi/secureboot.c
+===================================================================
+--- debian-kernel.orig/drivers/firmware/efi/secureboot.c
++++ debian-kernel/drivers/firmware/efi/secureboot.c
+@@ -15,6 +15,7 @@
+ #include <linux/efi.h>
+ #include <linux/kernel.h>
+ #include <linux/printk.h>
++#include <linux/security.h>
+ 
+ /*
+  * Decide what to do when UEFI secure boot mode is enabled.
+@@ -28,6 +29,10 @@ void __init efi_set_secure_boot(enum efi
+ 			break;
+ 		case efi_secureboot_mode_enabled:
+ 			set_bit(EFI_SECURE_BOOT, &efi.flags);
++#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT
++			lock_kernel_down("EFI Secure Boot",
++					 LOCKDOWN_INTEGRITY_MAX);
++#endif
+ 			pr_info("Secure boot enabled\n");
+ 			break;
+ 		default:
+Index: debian-kernel/include/linux/security.h
+===================================================================
+--- debian-kernel.orig/include/linux/security.h
++++ debian-kernel/include/linux/security.h
+@@ -451,6 +451,7 @@ int security_inode_notifysecctx(struct i
+ int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
+ int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
+ int security_locked_down(enum lockdown_reason what);
++int lock_kernel_down(const char *where, enum lockdown_reason level);
+ #else /* CONFIG_SECURITY */
+ 
+ static inline int call_blocking_lsm_notifier(enum lsm_event event, void *data)
+@@ -1291,6 +1292,11 @@ static inline int security_locked_down(e
+ {
+ 	return 0;
+ }
++static inline int
++lock_kernel_down(const char *where, enum lockdown_reason level)
++{
++	return -EOPNOTSUPP;
++}
+ #endif	/* CONFIG_SECURITY */
+ 
+ #if defined(CONFIG_SECURITY) && defined(CONFIG_WATCH_QUEUE)
+Index: debian-kernel/security/lockdown/Kconfig
+===================================================================
+--- debian-kernel.orig/security/lockdown/Kconfig
++++ debian-kernel/security/lockdown/Kconfig
+@@ -45,3 +45,18 @@ config LOCK_DOWN_KERNEL_FORCE_CONFIDENTI
+ 	 disabled.
+ 
+ endchoice
++
++config LOCK_DOWN_IN_EFI_SECURE_BOOT
++	bool "Lock down the kernel in EFI Secure Boot mode"
++	default n
++	depends on SECURITY_LOCKDOWN_LSM
++	depends on EFI
++	select SECURITY_LOCKDOWN_LSM_EARLY
++	help
++	  UEFI Secure Boot provides a mechanism for ensuring that the firmware
++	  will only load signed bootloaders and kernels.  Secure boot mode may
++	  be determined from EFI variables provided by the system firmware if
++	  not indicated by the boot parameters.
++
++	  Enabling this option results in kernel lockdown being
++	  triggered in confidentiality mode if EFI Secure Boot is set.
+Index: debian-kernel/security/lockdown/lockdown.c
+===================================================================
+--- debian-kernel.orig/security/lockdown/lockdown.c
++++ debian-kernel/security/lockdown/lockdown.c
+@@ -23,7 +23,7 @@ static const enum lockdown_reason lockdo
+ /*
+  * Put the kernel into lock-down mode.
+  */
+-static int lock_kernel_down(const char *where, enum lockdown_reason level)
++int lock_kernel_down(const char *where, enum lockdown_reason level)
+ {
+ 	if (kernel_locked_down >= level)
+ 		return -EPERM;
diff --git a/debian/patches/features/all/lockdown/mtd-disable-slram-and-phram-when-locked-down.patch b/debian/patches/features/all/lockdown/mtd-disable-slram-and-phram-when-locked-down.patch
new file mode 100644
index 000000000..5004e5dca
--- /dev/null
+++ b/debian/patches/features/all/lockdown/mtd-disable-slram-and-phram-when-locked-down.patch
@@ -0,0 +1,75 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Fri, 30 Aug 2019 15:54:24 +0100
+Subject: mtd: phram,slram: Disable when the kernel is locked down
+Forwarded: https://lore.kernel.org/linux-security-module/20190830154720.eekfjt6c4jzvlbfz@decadent.org.uk/
+
+These drivers allow mapping arbitrary memory ranges as MTD devices.
+This should be disabled to preserve the kernel's integrity when it is
+locked down.
+
+* Add the HWPARAM flag to the module parameters
+* When slram is built-in, it uses __setup() to read kernel parameters,
+  so add an explicit check security_locked_down() check
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+Cc: Matthew Garrett <mjg59@google.com>
+Cc: David Howells <dhowells@redhat.com>
+Cc: Joern Engel <joern@lazybastard.org>
+Cc: linux-mtd@lists.infradead.org
+---
+ drivers/mtd/devices/phram.c | 6 +++++-
+ drivers/mtd/devices/slram.c | 9 ++++++++-
+ 2 files changed, 13 insertions(+), 2 deletions(-)
+
+--- a/drivers/mtd/devices/phram.c
++++ b/drivers/mtd/devices/phram.c
+@@ -294,7 +294,11 @@ static int phram_param_call(const char *
+ #endif
+ }
+ 
+-module_param_call(phram, phram_param_call, NULL, NULL, 0200);
++static const struct kernel_param_ops phram_param_ops = {
++	.set = phram_param_call
++};
++__module_param_call(MODULE_PARAM_PREFIX, phram, &phram_param_ops, NULL,
++		    0200, -1, KERNEL_PARAM_FL_HWPARAM | hwparam_iomem);
+ MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\"");
+ 
+ 
+--- a/drivers/mtd/devices/slram.c
++++ b/drivers/mtd/devices/slram.c
+@@ -43,6 +43,7 @@
+ #include <linux/ioctl.h>
+ #include <linux/init.h>
+ #include <linux/io.h>
++#include <linux/security.h>
+ 
+ #include <linux/mtd/mtd.h>
+ 
+@@ -65,7 +66,7 @@ typedef struct slram_mtd_list {
+ #ifdef MODULE
+ static char *map[SLRAM_MAX_DEVICES_PARAMS];
+ 
+-module_param_array(map, charp, NULL, 0);
++module_param_hw_array(map, charp, iomem, NULL, 0);
+ MODULE_PARM_DESC(map, "List of memory regions to map. \"map=<name>, <start>, <length / end>\"");
+ #else
+ static char *map;
+@@ -281,11 +282,17 @@ static int __init init_slram(void)
+ #ifndef MODULE
+ 	char *devstart;
+ 	char *devlength;
++	int ret;
+ 
+ 	if (!map) {
+ 		E("slram: not enough parameters.\n");
+ 		return(-EINVAL);
+ 	}
++
++	ret = security_locked_down(LOCKDOWN_MODULE_PARAMETERS);
++	if (ret)
++		return ret;
++
+ 	while (map) {
+ 		devname = devstart = devlength = NULL;
+ 
diff --git a/debian/patches/features/all/security-perf-allow-further-restriction-of-perf_event_open.patch b/debian/patches/features/all/security-perf-allow-further-restriction-of-perf_event_open.patch
new file mode 100644
index 000000000..33db1f765
--- /dev/null
+++ b/debian/patches/features/all/security-perf-allow-further-restriction-of-perf_event_open.patch
@@ -0,0 +1,80 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Mon, 11 Jan 2016 15:23:55 +0000
+Subject: security,perf: Allow further restriction of perf_event_open
+Forwarded: https://lkml.org/lkml/2016/1/11/587
+
+When kernel.perf_event_open is set to 3 (or greater), disallow all
+access to performance events by users without CAP_SYS_ADMIN.
+Add a Kconfig symbol CONFIG_SECURITY_PERF_EVENTS_RESTRICT that
+makes this value the default.
+
+This is based on a similar feature in grsecurity
+(CONFIG_GRKERNSEC_PERF_HARDEN).  This version doesn't include making
+the variable read-only.  It also allows enabling further restriction
+at run-time regardless of whether the default is changed.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+ include/linux/perf_event.h | 5 +++++
+ kernel/events/core.c       | 8 ++++++++
+ security/Kconfig           | 9 +++++++++
+ 3 files changed, 22 insertions(+)
+
+--- a/include/linux/perf_event.h
++++ b/include/linux/perf_event.h
+@@ -1305,6 +1305,11 @@ int perf_cpu_time_max_percent_handler(st
+ int perf_event_max_stack_handler(struct ctl_table *table, int write,
+ 		void *buffer, size_t *lenp, loff_t *ppos);
+ 
++static inline bool perf_paranoid_any(void)
++{
++	return sysctl_perf_event_paranoid > 2;
++}
++
+ /* Access to perf_event_open(2) syscall. */
+ #define PERF_SECURITY_OPEN		0
+ 
+--- a/kernel/events/core.c
++++ b/kernel/events/core.c
+@@ -408,8 +408,13 @@ static cpumask_var_t perf_online_mask;
+  *   0 - disallow raw tracepoint access for unpriv
+  *   1 - disallow cpu events for unpriv
+  *   2 - disallow kernel profiling for unpriv
++ *   3 - disallow all unpriv perf event use
+  */
++#ifdef CONFIG_SECURITY_PERF_EVENTS_RESTRICT
++int sysctl_perf_event_paranoid __read_mostly = 3;
++#else
+ int sysctl_perf_event_paranoid __read_mostly = 2;
++#endif
+ 
+ /* Minimum for 512 kiB + 1 user control page */
+ int sysctl_perf_event_mlock __read_mostly = 512 + (PAGE_SIZE / 1024); /* 'free' kiB per user */
+@@ -11785,6 +11790,9 @@ SYSCALL_DEFINE5(perf_event_open,
+ 	if (err)
+ 		return err;
+ 
++	if (perf_paranoid_any() && !capable(CAP_SYS_ADMIN))
++		return -EACCES;
++
+ 	/* Do we allow access to perf_event_open(2) ? */
+ 	err = security_perf_event_open(&attr, PERF_SECURITY_OPEN);
+ 	if (err)
+--- a/security/Kconfig
++++ b/security/Kconfig
+@@ -19,6 +19,15 @@ config SECURITY_DMESG_RESTRICT
+ 
+ 	  If you are unsure how to answer this question, answer N.
+ 
++config SECURITY_PERF_EVENTS_RESTRICT
++	bool "Restrict unprivileged use of performance events"
++	depends on PERF_EVENTS
++	help
++	  If you say Y here, the kernel.perf_event_paranoid sysctl
++	  will be set to 3 by default, and no unprivileged use of the
++	  perf_event_open syscall will be permitted unless it is
++	  changed.
++
+ config SECURITY
+ 	bool "Enable different security models"
+ 	depends on SYSFS
diff --git a/debian/patches/features/arm64/arm64-compat-Implement-misalignment-fixups-for-multi.patch b/debian/patches/features/arm64/arm64-compat-Implement-misalignment-fixups-for-multi.patch
new file mode 100644
index 000000000..303e69f83
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-compat-Implement-misalignment-fixups-for-multi.patch
@@ -0,0 +1,480 @@
+From: Ard Biesheuvel <ardb@kernel.org>
+Date: Fri, 1 Jul 2022 15:53:22 +0200
+Subject: arm64: compat: Implement misalignment fixups for multiword loads
+Origin: https://git.kernel.org/linus/3fc24ef32d3b9368f4c103dcd21d6a3f959b4870
+
+The 32-bit ARM kernel implements fixups on behalf of user space when
+using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
+aligned. This is not something that is supported by the architecture,
+but was done anyway to increase compatibility with user space software,
+which mostly targeted x86 at the time and did not care about aligned
+accesses.
+
+This feature is one of the remaining impediments to being able to switch
+to 64-bit kernels on 64-bit capable hardware running 32-bit user space,
+so let's implement it for the arm64 compat layer as well.
+
+Note that the intent is to implement the exact same handling of
+misaligned multi-word loads and stores as the 32-bit kernel does,
+including what appears to be missing support for user space programs
+that rely on SETEND to switch to a different byte order and back. Also,
+like the 32-bit ARM version, we rely on the faulting address reported by
+the CPU to infer the memory address, instead of decoding the instruction
+fully to obtain this information.
+
+This implementation is taken from the 32-bit ARM tree, with all pieces
+removed that deal with instructions other than LDRD/STRD and LDM/STM, or
+that deal with alignment exceptions taken in kernel mode.
+
+Cc: debian-arm@lists.debian.org
+Cc: Vagrant Cascadian <vagrant@debian.org>
+Cc: Riku Voipio <riku.voipio@iki.fi>
+Cc: Steve McIntyre <steve@einval.com>
+Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
+Reviewed-by: Arnd Bergmann <arnd@arndb.de>
+Link: https://lore.kernel.org/r/20220701135322.3025321-1-ardb@kernel.org
+[catalin.marinas@arm.com: change the option to 'default n']
+Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
+---
+ arch/arm64/Kconfig                   |   3 +
+ arch/arm64/include/asm/exception.h   |   1 +
+ arch/arm64/kernel/Makefile           |   1 +
+ arch/arm64/kernel/compat_alignment.c | 387 +++++++++++++++++++++++++++
+ arch/arm64/mm/fault.c                |   3 +
+ 5 files changed, 395 insertions(+)
+ create mode 100644 arch/arm64/kernel/compat_alignment.c
+
+--- a/arch/arm64/Kconfig
++++ b/arch/arm64/Kconfig
+@@ -1328,6 +1328,9 @@ config THUMB2_COMPAT_VDSO
+ 	  Compile the compat vDSO with '-mthumb -fomit-frame-pointer' if y,
+ 	  otherwise with '-marm'.
+ 
++config COMPAT_ALIGNMENT_FIXUPS
++	bool "Fix up misaligned multi-word loads and stores in user space"
++
+ menuconfig ARMV8_DEPRECATED
+ 	bool "Emulate deprecated/obsolete ARMv8 instructions"
+ 	depends on SYSCTL
+--- a/arch/arm64/include/asm/exception.h
++++ b/arch/arm64/include/asm/exception.h
+@@ -47,6 +47,7 @@ void do_el0_sys(unsigned long esr, struc
+ void do_sp_pc_abort(unsigned long addr, unsigned int esr, struct pt_regs *regs);
+ void bad_el0_sync(struct pt_regs *regs, int reason, unsigned int esr);
+ void do_el0_cp15(unsigned long esr, struct pt_regs *regs);
++int do_compat_alignment_fixup(unsigned long addr, struct pt_regs *regs);
+ void do_el0_svc(struct pt_regs *regs);
+ void do_el0_svc_compat(struct pt_regs *regs);
+ void do_el0_fpac(struct pt_regs *regs, unsigned long esr);
+--- a/arch/arm64/kernel/Makefile
++++ b/arch/arm64/kernel/Makefile
+@@ -28,6 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
+ obj-$(CONFIG_COMPAT)			+= sys32.o signal32.o			\
+ 					   sys_compat.o
+ obj-$(CONFIG_COMPAT)			+= sigreturn32.o
++obj-$(CONFIG_COMPAT_ALIGNMENT_FIXUPS)	+= compat_alignment.o
+ obj-$(CONFIG_KUSER_HELPERS)		+= kuser32.o
+ obj-$(CONFIG_FUNCTION_TRACER)		+= ftrace.o entry-ftrace.o
+ obj-$(CONFIG_MODULES)			+= module.o
+--- /dev/null
++++ b/arch/arm64/kernel/compat_alignment.c
+@@ -0,0 +1,387 @@
++// SPDX-License-Identifier: GPL-2.0-only
++// based on arch/arm/mm/alignment.c
++
++#include <linux/compiler.h>
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/perf_event.h>
++#include <linux/uaccess.h>
++
++#include <asm/exception.h>
++#include <asm/ptrace.h>
++#include <asm/traps.h>
++
++/*
++ * 32-bit misaligned trap handler (c) 1998 San Mehat (CCC) -July 1998
++ *
++ * Speed optimisations and better fault handling by Russell King.
++ */
++#define CODING_BITS(i)	(i & 0x0e000000)
++
++#define LDST_P_BIT(i)	(i & (1 << 24))		/* Preindex		*/
++#define LDST_U_BIT(i)	(i & (1 << 23))		/* Add offset		*/
++#define LDST_W_BIT(i)	(i & (1 << 21))		/* Writeback		*/
++#define LDST_L_BIT(i)	(i & (1 << 20))		/* Load			*/
++
++#define LDST_P_EQ_U(i)	((((i) ^ ((i) >> 1)) & (1 << 23)) == 0)
++
++#define LDSTHD_I_BIT(i)	(i & (1 << 22))		/* double/half-word immed */
++
++#define RN_BITS(i)	((i >> 16) & 15)	/* Rn			*/
++#define RD_BITS(i)	((i >> 12) & 15)	/* Rd			*/
++#define RM_BITS(i)	(i & 15)		/* Rm			*/
++
++#define REGMASK_BITS(i)	(i & 0xffff)
++
++#define BAD_INSTR 	0xdeadc0de
++
++/* Thumb-2 32 bit format per ARMv7 DDI0406A A6.3, either f800h,e800h,f800h */
++#define IS_T32(hi16) \
++	(((hi16) & 0xe000) == 0xe000 && ((hi16) & 0x1800))
++
++union offset_union {
++	unsigned long un;
++	  signed long sn;
++};
++
++#define TYPE_ERROR	0
++#define TYPE_FAULT	1
++#define TYPE_LDST	2
++#define TYPE_DONE	3
++
++static void
++do_alignment_finish_ldst(unsigned long addr, u32 instr, struct pt_regs *regs,
++			 union offset_union offset)
++{
++	if (!LDST_U_BIT(instr))
++		offset.un = -offset.un;
++
++	if (!LDST_P_BIT(instr))
++		addr += offset.un;
++
++	if (!LDST_P_BIT(instr) || LDST_W_BIT(instr))
++		regs->regs[RN_BITS(instr)] = addr;
++}
++
++static int
++do_alignment_ldrdstrd(unsigned long addr, u32 instr, struct pt_regs *regs)
++{
++	unsigned int rd = RD_BITS(instr);
++	unsigned int rd2;
++	int load;
++
++	if ((instr & 0xfe000000) == 0xe8000000) {
++		/* ARMv7 Thumb-2 32-bit LDRD/STRD */
++		rd2 = (instr >> 8) & 0xf;
++		load = !!(LDST_L_BIT(instr));
++	} else if (((rd & 1) == 1) || (rd == 14)) {
++		return TYPE_ERROR;
++	} else {
++		load = ((instr & 0xf0) == 0xd0);
++		rd2 = rd + 1;
++	}
++
++	if (load) {
++		unsigned int val, val2;
++
++		if (get_user(val, (u32 __user *)addr) ||
++		    get_user(val2, (u32 __user *)(addr + 4)))
++			return TYPE_FAULT;
++		regs->regs[rd] = val;
++		regs->regs[rd2] = val2;
++	} else {
++		if (put_user(regs->regs[rd], (u32 __user *)addr) ||
++		    put_user(regs->regs[rd2], (u32 __user *)(addr + 4)))
++			return TYPE_FAULT;
++	}
++	return TYPE_LDST;
++}
++
++/*
++ * LDM/STM alignment handler.
++ *
++ * There are 4 variants of this instruction:
++ *
++ * B = rn pointer before instruction, A = rn pointer after instruction
++ *              ------ increasing address ----->
++ *	        |    | r0 | r1 | ... | rx |    |
++ * PU = 01             B                    A
++ * PU = 11        B                    A
++ * PU = 00        A                    B
++ * PU = 10             A                    B
++ */
++static int
++do_alignment_ldmstm(unsigned long addr, u32 instr, struct pt_regs *regs)
++{
++	unsigned int rd, rn, nr_regs, regbits;
++	unsigned long eaddr, newaddr;
++	unsigned int val;
++
++	/* count the number of registers in the mask to be transferred */
++	nr_regs = hweight16(REGMASK_BITS(instr)) * 4;
++
++	rn = RN_BITS(instr);
++	newaddr = eaddr = regs->regs[rn];
++
++	if (!LDST_U_BIT(instr))
++		nr_regs = -nr_regs;
++	newaddr += nr_regs;
++	if (!LDST_U_BIT(instr))
++		eaddr = newaddr;
++
++	if (LDST_P_EQ_U(instr))	/* U = P */
++		eaddr += 4;
++
++	for (regbits = REGMASK_BITS(instr), rd = 0; regbits;
++	     regbits >>= 1, rd += 1)
++		if (regbits & 1) {
++			if (LDST_L_BIT(instr)) {
++				if (get_user(val, (u32 __user *)eaddr))
++					return TYPE_FAULT;
++				if (rd < 15)
++					regs->regs[rd] = val;
++				else
++					regs->pc = val;
++			} else {
++				/*
++				 * The PC register has a bias of +8 in ARM mode
++				 * and +4 in Thumb mode. This means that a read
++				 * of the value of PC should account for this.
++				 * Since Thumb does not permit STM instructions
++				 * to refer to PC, just add 8 here.
++				 */
++				val = (rd < 15) ? regs->regs[rd] : regs->pc + 8;
++				if (put_user(val, (u32 __user *)eaddr))
++					return TYPE_FAULT;
++			}
++			eaddr += 4;
++		}
++
++	if (LDST_W_BIT(instr))
++		regs->regs[rn] = newaddr;
++
++	return TYPE_DONE;
++}
++
++/*
++ * Convert Thumb multi-word load/store instruction forms to equivalent ARM
++ * instructions so we can reuse ARM userland alignment fault fixups for Thumb.
++ *
++ * This implementation was initially based on the algorithm found in
++ * gdb/sim/arm/thumbemu.c. It is basically just a code reduction of same
++ * to convert only Thumb ld/st instruction forms to equivalent ARM forms.
++ *
++ * NOTES:
++ * 1. Comments below refer to ARM ARM DDI0100E Thumb Instruction sections.
++ * 2. If for some reason we're passed an non-ld/st Thumb instruction to
++ *    decode, we return 0xdeadc0de. This should never happen under normal
++ *    circumstances but if it does, we've got other problems to deal with
++ *    elsewhere and we obviously can't fix those problems here.
++ */
++
++static unsigned long thumb2arm(u16 tinstr)
++{
++	u32 L = (tinstr & (1<<11)) >> 11;
++
++	switch ((tinstr & 0xf800) >> 11) {
++	/* 6.6.1 Format 1: */
++	case 0xc000 >> 11:				/* 7.1.51 STMIA */
++	case 0xc800 >> 11:				/* 7.1.25 LDMIA */
++		{
++			u32 Rn = (tinstr & (7<<8)) >> 8;
++			u32 W = ((L<<Rn) & (tinstr&255)) ? 0 : 1<<21;
++
++			return 0xe8800000 | W | (L<<20) | (Rn<<16) |
++				(tinstr&255);
++		}
++
++	/* 6.6.1 Format 2: */
++	case 0xb000 >> 11:				/* 7.1.48 PUSH */
++	case 0xb800 >> 11:				/* 7.1.47 POP */
++		if ((tinstr & (3 << 9)) == 0x0400) {
++			static const u32 subset[4] = {
++				0xe92d0000,	/* STMDB sp!,{registers} */
++				0xe92d4000,	/* STMDB sp!,{registers,lr} */
++				0xe8bd0000,	/* LDMIA sp!,{registers} */
++				0xe8bd8000	/* LDMIA sp!,{registers,pc} */
++			};
++			return subset[(L<<1) | ((tinstr & (1<<8)) >> 8)] |
++			    (tinstr & 255);		/* register_list */
++		}
++		fallthrough;	/* for illegal instruction case */
++
++	default:
++		return BAD_INSTR;
++	}
++}
++
++/*
++ * Convert Thumb-2 32 bit LDM, STM, LDRD, STRD to equivalent instruction
++ * handlable by ARM alignment handler, also find the corresponding handler,
++ * so that we can reuse ARM userland alignment fault fixups for Thumb.
++ *
++ * @pinstr: original Thumb-2 instruction; returns new handlable instruction
++ * @regs: register context.
++ * @poffset: return offset from faulted addr for later writeback
++ *
++ * NOTES:
++ * 1. Comments below refer to ARMv7 DDI0406A Thumb Instruction sections.
++ * 2. Register name Rt from ARMv7 is same as Rd from ARMv6 (Rd is Rt)
++ */
++static void *
++do_alignment_t32_to_handler(u32 *pinstr, struct pt_regs *regs,
++			    union offset_union *poffset)
++{
++	u32 instr = *pinstr;
++	u16 tinst1 = (instr >> 16) & 0xffff;
++	u16 tinst2 = instr & 0xffff;
++
++	switch (tinst1 & 0xffe0) {
++	/* A6.3.5 Load/Store multiple */
++	case 0xe880:		/* STM/STMIA/STMEA,LDM/LDMIA, PUSH/POP T2 */
++	case 0xe8a0:		/* ...above writeback version */
++	case 0xe900:		/* STMDB/STMFD, LDMDB/LDMEA */
++	case 0xe920:		/* ...above writeback version */
++		/* no need offset decision since handler calculates it */
++		return do_alignment_ldmstm;
++
++	case 0xf840:		/* POP/PUSH T3 (single register) */
++		if (RN_BITS(instr) == 13 && (tinst2 & 0x09ff) == 0x0904) {
++			u32 L = !!(LDST_L_BIT(instr));
++			const u32 subset[2] = {
++				0xe92d0000,	/* STMDB sp!,{registers} */
++				0xe8bd0000,	/* LDMIA sp!,{registers} */
++			};
++			*pinstr = subset[L] | (1<<RD_BITS(instr));
++			return do_alignment_ldmstm;
++		}
++		/* Else fall through for illegal instruction case */
++		break;
++
++	/* A6.3.6 Load/store double, STRD/LDRD(immed, lit, reg) */
++	case 0xe860:
++	case 0xe960:
++	case 0xe8e0:
++	case 0xe9e0:
++		poffset->un = (tinst2 & 0xff) << 2;
++		fallthrough;
++
++	case 0xe940:
++	case 0xe9c0:
++		return do_alignment_ldrdstrd;
++
++	/*
++	 * No need to handle load/store instructions up to word size
++	 * since ARMv6 and later CPUs can perform unaligned accesses.
++	 */
++	default:
++		break;
++	}
++	return NULL;
++}
++
++static int alignment_get_arm(struct pt_regs *regs, __le32 __user *ip, u32 *inst)
++{
++	__le32 instr = 0;
++	int fault;
++
++	fault = get_user(instr, ip);
++	if (fault)
++		return fault;
++
++	*inst = __le32_to_cpu(instr);
++	return 0;
++}
++
++static int alignment_get_thumb(struct pt_regs *regs, __le16 __user *ip, u16 *inst)
++{
++	__le16 instr = 0;
++	int fault;
++
++	fault = get_user(instr, ip);
++	if (fault)
++		return fault;
++
++	*inst = __le16_to_cpu(instr);
++	return 0;
++}
++
++int do_compat_alignment_fixup(unsigned long addr, struct pt_regs *regs)
++{
++	union offset_union offset;
++	unsigned long instrptr;
++	int (*handler)(unsigned long addr, u32 instr, struct pt_regs *regs);
++	unsigned int type;
++	u32 instr = 0;
++	u16 tinstr = 0;
++	int isize = 4;
++	int thumb2_32b = 0;
++	int fault;
++
++	instrptr = instruction_pointer(regs);
++
++	if (compat_thumb_mode(regs)) {
++		__le16 __user *ptr = (__le16 __user *)(instrptr & ~1);
++
++		fault = alignment_get_thumb(regs, ptr, &tinstr);
++		if (!fault) {
++			if (IS_T32(tinstr)) {
++				/* Thumb-2 32-bit */
++				u16 tinst2;
++				fault = alignment_get_thumb(regs, ptr + 1, &tinst2);
++				instr = ((u32)tinstr << 16) | tinst2;
++				thumb2_32b = 1;
++			} else {
++				isize = 2;
++				instr = thumb2arm(tinstr);
++			}
++		}
++	} else {
++		fault = alignment_get_arm(regs, (__le32 __user *)instrptr, &instr);
++	}
++
++	if (fault)
++		return 1;
++
++	switch (CODING_BITS(instr)) {
++	case 0x00000000:	/* 3.13.4 load/store instruction extensions */
++		if (LDSTHD_I_BIT(instr))
++			offset.un = (instr & 0xf00) >> 4 | (instr & 15);
++		else
++			offset.un = regs->regs[RM_BITS(instr)];
++
++		if ((instr & 0x001000f0) == 0x000000d0 || /* LDRD */
++		    (instr & 0x001000f0) == 0x000000f0)   /* STRD */
++			handler = do_alignment_ldrdstrd;
++		else
++			return 1;
++		break;
++
++	case 0x08000000:	/* ldm or stm, or thumb-2 32bit instruction */
++		if (thumb2_32b) {
++			offset.un = 0;
++			handler = do_alignment_t32_to_handler(&instr, regs, &offset);
++		} else {
++			offset.un = 0;
++			handler = do_alignment_ldmstm;
++		}
++		break;
++
++	default:
++		return 1;
++	}
++
++	type = handler(addr, instr, regs);
++
++	if (type == TYPE_ERROR || type == TYPE_FAULT)
++		return 1;
++
++	if (type == TYPE_LDST)
++		do_alignment_finish_ldst(addr, instr, regs, offset);
++
++	perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, regs->pc);
++	arm64_skip_faulting_instruction(regs, isize);
++
++	return 0;
++}
+--- a/arch/arm64/mm/fault.c
++++ b/arch/arm64/mm/fault.c
+@@ -610,6 +610,9 @@ static int __kprobes do_translation_faul
+ static int do_alignment_fault(unsigned long addr, unsigned int esr,
+ 			      struct pt_regs *regs)
+ {
++	if (IS_ENABLED(CONFIG_COMPAT_ALIGNMENT_FIXUPS) &&
++	    compat_user_mode(regs))
++		return do_compat_alignment_fixup(addr, regs);
+ 	do_bad_area(addr, esr, regs);
+ 	return 0;
+ }
diff --git a/debian/patches/features/arm64/arm64-dts-raspberry-Add-support-for-the-CM4.patch b/debian/patches/features/arm64/arm64-dts-raspberry-Add-support-for-the-CM4.patch
new file mode 100644
index 000000000..8619cfcdd
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-raspberry-Add-support-for-the-CM4.patch
@@ -0,0 +1,423 @@
+From: Cyril Brulebois <cyril@debamax.com>
+Date: Mon, 03 Jan 2022 21:59:36 +0100
+Subject: arm64: dts: Add support for Raspberry Pi Compute Module 4 IO Board
+
+It was introduced in mainline during the v5.16 release cycle. Since
+many broadcom includes were reworked since v5.10, adding support would
+involve more than cherry-picking a DTS addition that uses a few
+includes.
+
+To avoid side effects on other models, introduce a DTS that leverages
+some existing includes (bcm2711.dtsi and bcm283x-rpi-usb-host.dtsi)
+and describes the rest without re-using parts of the Raspberry Pi 4 B
+model.
+
+To avoid phandle rotation (0x16, 0x17, and 0x18) across 3 nodes
+(dma@7e007000, i2c@7e205000, and interrupt-controller@7ef00100), and the
+related changes in other nodes referencing them, hardcode 0x16 as the
+phandle for interrupt-controller@7ef00100. This leads to an empty dtdiff
+between this new DTB and the one produced by a v5.16-rc8 build.
+
+Authored-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+Reviewed-by: Cyril Brulebois <cyril@debamax.com>
+
+--- a/arch/arm64/boot/dts/broadcom/Makefile
++++ b/arch/arm64/boot/dts/broadcom/Makefile
+@@ -1,5 +1,6 @@
+ # SPDX-License-Identifier: GPL-2.0
+ dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-4-b.dtb \
++			      bcm2711-rpi-cm4-io.dtb \
+ 			      bcm2837-rpi-3-a-plus.dtb \
+ 			      bcm2837-rpi-3-b.dtb \
+ 			      bcm2837-rpi-3-b-plus.dtb \
+--- /dev/null
++++ b/arch/arm64/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
+@@ -0,0 +1,2 @@
++// SPDX-License-Identifier: GPL-2.0
++#include "arm/bcm2711-rpi-cm4-io.dts"
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -93,6 +93,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
+ 	bcm2837-rpi-3-b-plus.dtb \
+ 	bcm2837-rpi-cm3-io3.dtb \
+ 	bcm2711-rpi-4-b.dtb \
++	bcm2711-rpi-cm4-io.dtb \
+ 	bcm2835-rpi-zero.dtb \
+ 	bcm2835-rpi-zero-w.dtb
+ dtb-$(CONFIG_ARCH_BCM_5301X) += \
+--- /dev/null
++++ b/arch/arm/boot/dts/bcm2711-rpi-cm4-io.dts
+@@ -0,0 +1,373 @@
++/dts-v1/;
++
++#include "bcm2711.dtsi"
++#include "bcm283x-rpi-usb-host.dtsi"
++
++/ {
++	model = "Raspberry Pi Compute Module 4 IO Board";
++	compatible = "raspberrypi,4-compute-module\0brcm,bcm2711";
++
++	aliases {
++		emmc2bus = "/emmc2bus";
++		ethernet0 = "/scb/ethernet@7d580000";
++		pcie0 = "/scb/pcie@7d500000";
++		blconfig = &blconfig;
++	};
++
++	chosen {
++		stdout-path = "serial1:115200n8";
++	};
++
++	leds {
++		compatible = "gpio-leds";
++
++		led-act {
++			label = "ACT";
++			default-state = "keep";
++			linux,default-trigger = "heartbeat";
++			gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
++		};
++
++		led-pwr {
++			label = "PWR";
++			gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
++			default-state = "keep";
++			linux,default-trigger = "default-on";
++		};
++	};
++
++	soc {
++		aon_intr: interrupt-controller@7ef00100 {
++			compatible = "brcm,bcm2711-l2-intc", "brcm,l2-intc";
++			reg = <0x7ef00100 0x30>;
++			phandle = <0x16>;
++			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
++			interrupt-controller;
++			#interrupt-cells = <1>;
++		};
++
++		firmware: firmware {
++			compatible = "raspberrypi,bcm2835-firmware\0simple-mfd";
++			#address-cells = <0x01>;
++			#size-cells = <0x01>;
++			mboxes = <&mailbox>;
++			dma-ranges;
++
++			firmware_clocks: clocks {
++				compatible = "raspberrypi,firmware-clocks";
++				#clock-cells = <0x01>;
++			};
++
++			expgpio: gpio {
++				compatible = "raspberrypi,firmware-gpio";
++				gpio-controller;
++				#gpio-cells = <2>;
++				status = "okay";
++				gpio-line-names = "BT_ON", "WL_ON", "PWR_LED_OFF", "ANT1", "VDD_SD_IO_SEL", "CAM_GPIO", "SD_PWR_ON", "ANT2";
++				ant1-hog {
++					gpio-hog;
++					gpios = <0x03 0x00>;
++					output-high;
++					line-name = "ant1";
++				};
++
++				ant2-hog {
++					gpio-hog;
++					gpios = <0x07 0x00>;
++					output-low;
++					line-name = "ant2";
++				};
++			};
++
++			reset {
++				compatible = "raspberrypi,firmware-reset";
++				#reset-cells = <1>;
++			};
++		};
++
++		power: power {
++			compatible = "raspberrypi,bcm2835-power";
++			firmware = <&firmware>;
++			#power-domain-cells = <1>;
++		};
++
++		mailbox@7e00b840 {
++			compatible = "brcm,bcm2835-vchiq";
++			reg = <0x7e00b840 0x3c>;
++			interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
++		};
++
++		vec@7ec13000 {
++			compatible = "brcm,bcm2711-vec";
++			reg = <0x7ec13000 0x1000>;
++			clocks = <&clocks BCM2835_CLOCK_VEC>;
++			interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
++			status = "disabled";
++			power-domains = <&power /* RPI_POWER_DOMAIN_VEC = */ 7>;
++		};
++	};
++
++	memory@0 {
++		device_type = "memory";
++		reg = <0x00 0x00 0x00>;
++	};
++
++	wifi_pwrseq: wifi-pwrseq {
++		compatible = "mmc-pwrseq-simple";
++		reset-gpios = <&expgpio 0x01 0x01>;
++	};
++
++	sd_io_1v8_reg: sd_io_1v8_reg {
++		compatible = "regulator-gpio";
++		regulator-name = "vdd-sd-io";
++		regulator-min-microvolt = <1800000>;
++		regulator-max-microvolt = <3300000>;
++		regulator-boot-on;
++		regulator-always-on;
++		regulator-settling-time-us = <5000>;
++		gpios = <&expgpio 0x04 GPIO_ACTIVE_HIGH>;
++		states = <1800000 0x1>,
++			 <3300000 0x0>;
++		status = "okay";
++	};
++
++	sd_vcc_reg: sd_vcc_reg {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc-sd";
++		regulator-min-microvolt = <3300000>;
++		regulator-max-microvolt = <3300000>;
++		regulator-boot-on;
++		enable-active-high;
++		gpio = <&expgpio 6 GPIO_ACTIVE_HIGH>;
++	};
++};
++
++&ddc0 {
++	status = "okay";
++};
++
++&ddc1 {
++	status = "okay";
++};
++
++&dsi0 {
++	power-domains = <&power 17>;
++};
++
++&dsi1 {
++	compatible = "brcm,bcm2711-dsi1";
++	power-domains = <&power 18>;
++};
++
++&emmc2 {
++	status = "okay";
++	bus-width = <8>;
++	vqmmc-supply = <&sd_io_1v8_reg>;
++	vmmc-supply = <&sd_vcc_reg>;
++	broken-cd;
++	mmc-hs200-1_8v;
++};
++
++&gpio {
++	pinctrl-names = "default";
++	/*
++	 * Parts taken from rpi_SCH_4b_4p0_reduced.pdf and
++	 * the official GPU firmware DT blob.
++	 *
++	 * Legend:
++	 * "FOO" = GPIO line named "FOO" on the schematic
++	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
++	 */
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
++			  "SDA1",
++			  "SCL1",
++			  "GPIO_GCLK",
++			  "GPIO5",
++			  "GPIO6",
++			  "SPI_CE1_N",
++			  "SPI_CE0_N",
++			  "SPI_MISO",
++			  "SPI_MOSI",
++			  "SPI_SCLK",
++			  "GPIO12",
++			  "GPIO13",
++			  /* Serial port */
++			  "TXD1",
++			  "RXD1",
++			  "GPIO16",
++			  "GPIO17",
++			  "GPIO18",
++			  "GPIO19",
++			  "GPIO20",
++			  "GPIO21",
++			  "GPIO22",
++			  "GPIO23",
++			  "GPIO24",
++			  "GPIO25",
++			  "GPIO26",
++			  "GPIO27",
++			  "RGMII_MDIO",
++			  "RGMIO_MDC",
++			  /* Used by BT module */
++			  "CTS0",
++			  "RTS0",
++			  "TXD0",
++			  "RXD0",
++			  /* Used by Wifi */
++			  "SD1_CLK",
++			  "SD1_CMD",
++			  "SD1_DATA0",
++			  "SD1_DATA1",
++			  "SD1_DATA2",
++			  "SD1_DATA3",
++			  /* Shared with SPI flash */
++			  "PWM0_MISO",
++			  "PWM1_MOSI",
++			  "STATUS_LED_G_CLK",
++			  "SPIFLASH_CE_N",
++			  "SDA0",
++			  "SCL0",
++			  "RGMII_RXCLK",
++			  "RGMII_RXCTL",
++			  "RGMII_RXD0",
++			  "RGMII_RXD1",
++			  "RGMII_RXD2",
++			  "RGMII_RXD3",
++			  "RGMII_TXCLK",
++			  "RGMII_TXCTL",
++			  "RGMII_TXD0",
++			  "RGMII_TXD1",
++			  "RGMII_TXD2",
++			  "RGMII_TXD3";
++
++	gpioout {
++		brcm,pins = <0x06>;
++		brcm,function = <0x01>;
++	};
++
++	alt0 {
++		brcm,pins = <0x04 0x05 0x07 0x08 0x09 0x0a 0x0b>;
++		brcm,function = <0x04>;
++	};
++};
++
++&hdmi0 {
++	status = "okay";
++	interrupt-parent = <&aon_intr>;
++	interrupts = <0>, <1>, <2>, <3>, <4>, <5>;
++	interrupt-names = "cec-tx", "cec-rx", "cec-low", "wakeup", "hpd-connected", "hpd-removed";
++	clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 0>, <&clk_27MHz>;
++	wifi-2.4ghz-coexistence;
++};
++
++&hdmi1 {
++	status = "okay";
++	interrupt-parent = <&aon_intr>;
++	interrupts = <8>, <7>, <6>, <9>, <10>, <11>;
++	interrupt-names = "cec-tx", "cec-rx", "cec-low", "wakeup", "hpd-connected", "hpd-removed";
++	clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 1>, <&clk_27MHz>;
++	wifi-2.4ghz-coexistence;
++};
++
++&hvs {
++	clocks = <&firmware_clocks 4>;
++};
++
++&i2c0 {
++	status = "okay";
++	pinctrl-names = "default";
++	pinctrl-0 = <&i2c0_gpio0>;
++	clock-frequency = <100000>;
++};
++
++&i2c1 {
++	status = "okay";
++	pinctrl-names = "default";
++	pinctrl-0 = <&i2c1_gpio2>;
++	clock-frequency = <100000>;
++};
++
++&genet {
++	status = "okay";
++	phy-handle = <&ethphy0>;
++	phy-mode = "rgmii-rxid";
++};
++
++&genet_mdio {
++	ethphy0: ethernet-phy@0 {
++		reg = <0>;
++	};
++};
++
++&pixelvalve0 {
++	status = "okay";
++};
++
++&pixelvalve1 {
++	status = "okay";
++};
++
++&pixelvalve2 {
++	status = "okay";
++};
++
++&pixelvalve4 {
++	status = "okay";
++};
++
++&rmem {
++	blconfig: nvram@0 {
++		compatible = "raspberrypi,bootloader-config", "nvmem-rmem";
++		#address-cells = <0x01>;
++		#size-cells = <0x01>;
++		reg = <0x00 0x00 0x00>;
++		no-map;
++		status = "disabled";
++	};
++};
++
++&sdhci {
++	status = "okay";
++	#address-cells = <1>;
++	#size-cells = <0>;
++	pinctrl-names = "default";
++	pinctrl-0 = <&emmc_gpio34>;
++	bus-width = <4>;
++	non-removable;
++	mmc-pwrseq = <&wifi_pwrseq>;
++
++	wifi@1 {
++		reg = <0x01>;
++		compatible = "brcm,bcm4329-fmac";
++	};
++};
++
++&uart0 {
++	status = "okay";
++	pinctrl-names = "default";
++	pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32>;
++	uart-has-rtscts;
++
++	bluetooth {
++		compatible = "brcm,bcm43438-bt";
++		max-speed = <0x1e8480>;
++		shutdown-gpios = <&expgpio 0x00 0x00>;
++	};
++};
++
++&uart1 {
++	status = "okay";
++	pinctrl-names = "default";
++	pinctrl-0 = <&uart1_gpio14>;
++};
++
++&usb {
++	power-domains = <&power 6>;
++};
++
++&vc4 {
++	status = "okay";
++};
++
++/delete-node/ &vec;
diff --git a/debian/patches/features/arm64/arm64-dts-rockchip-Add-basic-support-for-Kobol-s-Hel.patch b/debian/patches/features/arm64/arm64-dts-rockchip-Add-basic-support-for-Kobol-s-Hel.patch
new file mode 100644
index 000000000..deeed7034
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-rockchip-Add-basic-support-for-Kobol-s-Hel.patch
@@ -0,0 +1,419 @@
+From: Uwe Kleine-König <uwe@kleine-koenig.org>
+Date: Wed, 14 Oct 2020 22:00:30 +0200
+Subject: arm64: dts: rockchip: Add basic support for Kobol's Helios64
+Origin: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=09e006cfb43e8ec38afe28278b210dab72e6cac8
+
+The hardware is described in detail on Kobol's wiki at
+https://wiki.kobol.io/helios64/intro/.
+
+Up to now the following peripherals are working:
+
+ - UART
+ - Micro-SD card
+ - eMMC
+ - ethernet port 1
+ - status LED
+ - temperature sensor on i2c bus 2
+
+Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
+Link: https://lore.kernel.org/r/20201014200030.845759-3-uwe@kleine-koenig.org
+Signed-off-by: Heiko Stuebner <heiko@sntech.de>
+---
+ arch/arm64/boot/dts/rockchip/Makefile         |   1 +
+ .../dts/rockchip/rk3399-kobol-helios64.dts    | 372 ++++++++++++++++++
+ 2 files changed, 373 insertions(+)
+ create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+
+diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
+index 26661c7b736b..28b26a874313 100644
+--- a/arch/arm64/boot/dts/rockchip/Makefile
++++ b/arch/arm64/boot/dts/rockchip/Makefile
+@@ -26,6 +26,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-hugsun-x99.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-khadas-edge.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-khadas-edge-captain.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-khadas-edge-v.dtb
++dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-kobol-helios64.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-leez-p710.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopc-t4.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-m4.dtb
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+new file mode 100644
+index 000000000000..2a561be724b2
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+@@ -0,0 +1,372 @@
++// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
++/*
++ * Copyright (c) 2020 Aditya Prayoga <aditya@kobol.io>
++ */
++
++/*
++ * The Kobol Helios64 is a board designed to operate as a NAS and optionally
++ * ships with an enclosing that can host five 2.5" hard disks.
++ *
++ * See https://wiki.kobol.io/helios64/intro/ for further details.
++ */
++
++/dts-v1/;
++#include "rk3399.dtsi"
++#include "rk3399-opp.dtsi"
++
++/ {
++	model = "Kobol Helios64";
++	compatible = "kobol,helios64", "rockchip,rk3399";
++
++	avdd_1v8_s0: avdd-1v8-s0 {
++		compatible = "regulator-fixed";
++		regulator-name = "avdd_1v8_s0";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <1800000>;
++		regulator-max-microvolt = <1800000>;
++		vin-supply = <&vcc3v3_sys_s3>;
++	};
++
++	clkin_gmac: external-gmac-clock {
++		compatible = "fixed-clock";
++		clock-frequency = <125000000>;
++		clock-output-names = "clkin_gmac";
++		#clock-cells = <0>;
++	};
++
++	leds {
++		compatible = "gpio-leds";
++		pinctrl-names = "default";
++		pinctrl-0 = <&sys_grn_led_on &sys_red_led_on>;
++
++		led-0 {
++			label = "helios64:green:status";
++			gpios = <&gpio0 RK_PB4 GPIO_ACTIVE_HIGH>;
++			default-state = "on";
++		};
++
++		led-1 {
++			label = "helios64:red:fault";
++			gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
++			default-state = "keep";
++		};
++	};
++
++	vcc1v8_sys_s0: vcc1v8-sys-s0 {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc1v8_sys_s0";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <1800000>;
++		regulator-max-microvolt = <1800000>;
++		vin-supply = <&vcc1v8_sys_s3>;
++	};
++
++	vcc3v0_sd: vcc3v0-sd {
++		compatible = "regulator-fixed";
++		enable-active-high;
++		gpio = <&gpio0 RK_PA1 GPIO_ACTIVE_HIGH>;
++		regulator-name = "vcc3v0_sd";
++		regulator-boot-on;
++		regulator-min-microvolt = <3000000>;
++		regulator-max-microvolt = <3000000>;
++		pinctrl-names = "default";
++		pinctrl-0 = <&sdmmc0_pwr_h>;
++		vin-supply = <&vcc3v3_sys_s3>;
++	};
++
++	vcc3v3_sys_s3: vcc_lan: vcc3v3-sys-s3 {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc3v3_sys_s3";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <3300000>;
++		regulator-max-microvolt = <3300000>;
++		vin-supply = <&vcc5v0_sys>;
++
++		regulator-state-mem {
++			regulator-on-in-suspend;
++		};
++	};
++
++	vcc5v0_sys: vcc5v0-sys {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc5v0_sys";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <5000000>;
++		regulator-max-microvolt = <5000000>;
++		vin-supply = <&vcc12v_dcin_bkup>;
++
++		regulator-state-mem {
++			regulator-on-in-suspend;
++		};
++	};
++
++	vcc12v_dcin: vcc12v-dcin {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc12v_dcin";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <12000000>;
++		regulator-max-microvolt = <12000000>;
++	};
++
++	vcc12v_dcin_bkup: vcc12v-dcin-bkup {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc12v_dcin_bkup";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <12000000>;
++		regulator-max-microvolt = <12000000>;
++		vin-supply = <&vcc12v_dcin>;
++	};
++};
++
++/*
++ * The system doesn't run stable with cpu freq enabled, so disallow the lower
++ * frequencies until this problem is properly understood and resolved.
++ */
++&cluster0_opp {
++	/delete-node/ opp00;
++	/delete-node/ opp01;
++	/delete-node/ opp02;
++	/delete-node/ opp03;
++	/delete-node/ opp04;
++};
++
++&cluster1_opp {
++	/delete-node/ opp00;
++	/delete-node/ opp01;
++	/delete-node/ opp02;
++	/delete-node/ opp03;
++	/delete-node/ opp04;
++	/delete-node/ opp05;
++	/delete-node/ opp06;
++};
++
++&cpu_b0 {
++	cpu-supply = <&vdd_cpu_b>;
++};
++
++&cpu_b1 {
++	cpu-supply = <&vdd_cpu_b>;
++};
++
++&cpu_l0 {
++	cpu-supply = <&vdd_cpu_l>;
++};
++
++&cpu_l1 {
++	cpu-supply = <&vdd_cpu_l>;
++};
++
++&cpu_l2 {
++	cpu-supply = <&vdd_cpu_l>;
++};
++
++&cpu_l3 {
++	cpu-supply = <&vdd_cpu_l>;
++};
++
++&emmc_phy {
++	status = "okay";
++};
++
++&gmac {
++	assigned-clock-parents = <&clkin_gmac>;
++	assigned-clocks = <&cru SCLK_RMII_SRC>;
++	clock_in_out = "input";
++	phy-mode = "rgmii";
++	phy-supply = <&vcc_lan>;
++	pinctrl-names = "default";
++	pinctrl-0 = <&rgmii_pins &gphy_reset>;
++	rx_delay = <0x20>;
++	tx_delay = <0x28>;
++	snps,reset-active-low;
++	snps,reset-delays-us = <0 10000 50000>;
++	snps,reset-gpio = <&gpio3 RK_PB7 GPIO_ACTIVE_LOW>;
++	status = "okay";
++};
++
++&i2c0 {
++	clock-frequency = <400000>;
++	i2c-scl-rising-time-ns = <168>;
++	i2c-scl-falling-time-ns = <4>;
++	status = "okay";
++
++	rk808: pmic@1b {
++		compatible = "rockchip,rk808";
++		reg = <0x1b>;
++		interrupt-parent = <&gpio0>;
++		interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
++		clock-output-names = "xin32k", "rk808-clkout2";
++		pinctrl-names = "default";
++		pinctrl-0 = <&pmic_int_l>;
++		vcc1-supply = <&vcc5v0_sys>;
++		vcc2-supply = <&vcc5v0_sys>;
++		vcc3-supply = <&vcc5v0_sys>;
++		vcc4-supply = <&vcc5v0_sys>;
++		vcc6-supply = <&vcc5v0_sys>;
++		vcc7-supply = <&vcc5v0_sys>;
++		vcc8-supply = <&vcc3v3_sys_s3>;
++		vcc9-supply = <&vcc5v0_sys>;
++		vcc10-supply = <&vcc5v0_sys>;
++		vcc11-supply = <&vcc5v0_sys>;
++		vcc12-supply = <&vcc3v3_sys_s3>;
++		vddio-supply = <&vcc3v0_s3>;
++		wakeup-source;
++		#clock-cells = <1>;
++
++		regulators {
++			vdd_cpu_l: DCDC_REG2 {
++				regulator-name = "vdd_cpu_l";
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-min-microvolt = <750000>;
++				regulator-max-microvolt = <1350000>;
++				regulator-ramp-delay = <6001>;
++
++				regulator-state-mem {
++					regulator-off-in-suspend;
++				};
++			};
++
++			vcc1v8_sys_s3: DCDC_REG4 {
++				regulator-name = "vcc1v8_sys_s3";
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-min-microvolt = <1800000>;
++				regulator-max-microvolt = <1800000>;
++
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <1800000>;
++				};
++			};
++
++			vcc_sdio_s0: LDO_REG4 {
++				regulator-name = "vcc_sdio_s0";
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-min-microvolt = <1800000>;
++				regulator-max-microvolt = <3000000>;
++
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <3000000>;
++				};
++			};
++
++			vcc3v0_s3: LDO_REG8 {
++				regulator-name = "vcc3v0_s3";
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-min-microvolt = <3000000>;
++				regulator-max-microvolt = <3000000>;
++
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <3000000>;
++				};
++			};
++		};
++	};
++
++	vdd_cpu_b: regulator@40 {
++		compatible = "silergy,syr827";
++		reg = <0x40>;
++		fcs,suspend-voltage-selector = <1>;
++		regulator-name = "vdd_cpu_b";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <712500>;
++		regulator-max-microvolt = <1500000>;
++		regulator-ramp-delay = <1000>;
++		vin-supply = <&vcc5v0_sys>;
++
++		regulator-state-mem {
++			regulator-off-in-suspend;
++		};
++	};
++};
++
++&i2c2 {
++	clock-frequency = <400000>;
++	i2c-scl-rising-time-ns = <160>;
++	i2c-scl-falling-time-ns = <30>;
++	status = "okay";
++
++	temp@4c {
++		compatible = "national,lm75";
++		reg = <0x4c>;
++	};
++};
++
++&io_domains {
++	audio-supply = <&vcc1v8_sys_s0>;
++	bt656-supply = <&vcc1v8_sys_s0>;
++	gpio1830-supply = <&vcc3v0_s3>;
++	sdmmc-supply = <&vcc_sdio_s0>;
++	status = "okay";
++};
++
++&pinctrl {
++	gmac {
++		gphy_reset: gphy-reset {
++			rockchip,pins = <3 RK_PB7 RK_FUNC_GPIO &pcfg_output_low>;
++		};
++	};
++
++	leds {
++		sys_grn_led_on: sys-grn-led-on {
++			rockchip,pins = <0 RK_PB4 RK_FUNC_GPIO &pcfg_pull_down>;
++		};
++
++		sys_red_led_on: sys-red-led-on {
++			rockchip,pins = <0 RK_PB5 RK_FUNC_GPIO &pcfg_pull_down>;
++		};
++	};
++
++	pmic {
++		pmic_int_l: pmic-int-l {
++			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>;
++		};
++	};
++
++	vcc3v0-sd {
++		sdmmc0_pwr_h: sdmmc0-pwr-h {
++			rockchip,pins = <0 RK_PA1 RK_FUNC_GPIO &pcfg_pull_up>;
++		};
++	};
++};
++
++&pmu_io_domains {
++	pmu1830-supply = <&vcc3v0_s3>;
++	status = "okay";
++};
++
++&sdhci {
++	bus-width = <8>;
++	mmc-hs200-1_8v;
++	non-removable;
++	vqmmc-supply = <&vcc1v8_sys_s0>;
++	status = "okay";
++};
++
++&sdmmc {
++	bus-width = <4>;
++	cap-sd-highspeed;
++	cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>;
++	disable-wp;
++	pinctrl-names = "default";
++	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;
++	vmmc-supply = <&vcc3v0_sd>;
++	vqmmc-supply = <&vcc_sdio_s0>;
++	status = "okay";
++};
++
++&uart2 {
++	status = "okay";
++};
+-- 
+2.28.0
+
diff --git a/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-PCIe-on-helios64.patch b/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-PCIe-on-helios64.patch
new file mode 100644
index 000000000..6abebd080
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-PCIe-on-helios64.patch
@@ -0,0 +1,113 @@
+From: Uwe Kleine-König <uwe@kleine-koenig.org>
+Date: Mon, 10 May 2021 11:09:32 +0200
+Subject: arm64: dts: rockchip: Add support for PCIe on helios64
+Origin: https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/patch/?id=5a65adfa2ad1542f856fc7de3999d51f3a35d2e2
+
+This is enough to make the SATA controller visible:
+
+# lspci
+00:00.0 PCI bridge: Fuzhou Rockchip Electronics Co., Ltd RK3399 PCI Express Root Port
+01:00.0 SATA controller: JMicron Technology Corp. JMB58x AHCI SATA controller
+
+Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
+Link: https://lore.kernel.org/r/20210510090932.970447-1-uwe@kleine-koenig.org
+Signed-off-by: Heiko Stuebner <heiko@sntech.de>
+---
+ .../dts/rockchip/rk3399-kobol-helios64.dts    | 53 +++++++++++++++++++
+ 1 file changed, 53 insertions(+)
+
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+index 9d4a0885fd12..037dc5cdc3f3 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+@@ -23,6 +23,16 @@ aliases {
+ 		mmc1 = &sdhci;
+ 	};
+ 
++	avdd_0v9_s0: avdd-0v9-s0 {
++		compatible = "regulator-fixed";
++		regulator-name = "avdd_0v9_s0";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <900000>;
++		regulator-max-microvolt = <900000>;
++		vin-supply = <&vcc1v8_sys_s3>;
++	};
++
+ 	avdd_1v8_s0: avdd-1v8-s0 {
+ 		compatible = "regulator-fixed";
+ 		regulator-name = "avdd_1v8_s0";
+@@ -72,6 +82,18 @@ led-1 {
+ 		};
+ 	};
+ 
++	pcie_power: pcie-power {
++		compatible = "regulator-fixed";
++		enable-active-high;
++		gpio = <&gpio1 RK_PD0 GPIO_ACTIVE_HIGH>;
++		pinctrl-0 = <&pcie_pwr>;
++		pinctrl-names = "default";
++		regulator-boot-on;
++		regulator-name = "pcie_power";
++		startup-delay-us = <10000>;
++		vin-supply = <&vcc5v0_perdev>;
++	};
++
+ 	vcc1v8_sys_s0: vcc1v8-sys-s0 {
+ 		compatible = "regulator-fixed";
+ 		regulator-name = "vcc1v8_sys_s0";
+@@ -109,6 +131,16 @@ regulator-state-mem {
+ 		};
+ 	};
+ 
++	vcc5v0_perdev: vcc5v0-perdev {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc5v0_perdev";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <5000000>;
++		regulator-max-microvolt = <5000000>;
++		vin-supply = <&vcc12v_dcin_bkup>;
++	};
++
+ 	vcc5v0_sys: vcc5v0-sys {
+ 		compatible = "regulator-fixed";
+ 		regulator-name = "vcc5v0_sys";
+@@ -331,6 +363,20 @@ &io_domains {
+ 	status = "okay";
+ };
+ 
++&pcie_phy {
++	status = "okay";
++};
++
++&pcie0 {
++	num-lanes = <2>;
++	status = "okay";
++
++	vpcie12v-supply = <&vcc12v_dcin>;
++	vpcie3v3-supply = <&pcie_power>;
++	vpcie1v8-supply = <&avdd_1v8_s0>;
++	vpcie0v9-supply = <&avdd_0v9_s0>;
++};
++
+ &pinctrl {
+ 	gmac {
+ 		gphy_reset: gphy-reset {
+@@ -348,6 +394,13 @@ sys_red_led_on: sys-red-led-on {
+ 		};
+ 	};
+ 
++	pcie {
++		pcie_pwr: pcie-pwr {
++			rockchip,pins =
++				<1 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none>;
++		};
++	};
++
+ 	pmic {
+ 		pmic_int_l: pmic-int-l {
+ 			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
+-- 
+2.30.2
+
diff --git a/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-two-PWM-fans-on-h.patch b/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-two-PWM-fans-on-h.patch
new file mode 100644
index 000000000..9755e0b8c
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-rockchip-Add-support-for-two-PWM-fans-on-h.patch
@@ -0,0 +1,61 @@
+From: Uwe Kleine-König <uwe@kleine-koenig.org>
+Date: Mon, 10 May 2021 11:06:07 +0200
+Subject: arm64: dts: rockchip: Add support for two PWM fans on
+ helios64
+Origin: https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/patch/?id=271b66414df0b172c936b3cfd1894b7939f84165
+
+On the helios64 board the two connectors P6 and P7 are supposed to
+power two fans. Add the corresponding pwm-fan devices.
+
+Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
+Link: https://lore.kernel.org/r/20210510090607.970145-1-uwe@kleine-koenig.org
+Signed-off-by: Heiko Stuebner <heiko@sntech.de>
+---
+ .../dts/rockchip/rk3399-kobol-helios64.dts    | 24 +++++++++++++++++++
+ 1 file changed, 24 insertions(+)
+
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+index 19485b552bc4..9d4a0885fd12 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+@@ -40,6 +40,20 @@ clkin_gmac: external-gmac-clock {
+ 		#clock-cells = <0>;
+ 	};
+ 
++	fan1 {
++		/* fan connected to P7 */
++		compatible = "pwm-fan";
++		pwms = <&pwm0 0 40000 0>;
++		cooling-levels = <0 80 170 255>;
++	};
++
++	fan2 {
++		/* fan connected to P6 */
++		compatible = "pwm-fan";
++		pwms = <&pwm1 0 40000 0>;
++		cooling-levels = <0 80 170 255>;
++	};
++
+ 	leds {
+ 		compatible = "gpio-leds";
+ 		pinctrl-names = "default";
+@@ -352,6 +366,16 @@ &pmu_io_domains {
+ 	status = "okay";
+ };
+ 
++&pwm0 {
++	/* pwm-fan on P7 */
++	status = "okay";
++};
++
++&pwm1 {
++	/* pwm-fan on P6 */
++	status = "okay";
++};
++
+ &sdhci {
+ 	bus-width = <8>;
+ 	mmc-hs200-1_8v;
+-- 
+2.30.2
+
diff --git a/debian/patches/features/arm64/arm64-dts-rockchip-Rely-on-SoC-external-pull-up-on-p.patch b/debian/patches/features/arm64/arm64-dts-rockchip-Rely-on-SoC-external-pull-up-on-p.patch
new file mode 100644
index 000000000..ef6dab336
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-rockchip-Rely-on-SoC-external-pull-up-on-p.patch
@@ -0,0 +1,32 @@
+From: Uwe Kleine-König <uwe@kleine-koenig.org>
+Date: Sun, 24 Jan 2021 22:03:28 +0100
+Subject: arm64: dts: rockchip: Rely on SoC external pull up on pmic-int-l on Helios64
+Origin: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=1e58ba111421375c5948c3e8145bdd84b06ac095
+
+According to the schematic there is an external pull up, so there is no
+need to enable the internal one additionally. Using no pull up matches
+the vendor device tree.
+
+Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
+Link: https://lore.kernel.org/r/20210124210328.611707-2-uwe@kleine-koenig.org
+Signed-off-by: Heiko Stuebner <heiko@sntech.de>
+---
+ arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+index 2a561be724b2..66c725a34220 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+@@ -331,7 +331,7 @@ sys_red_led_on: sys-red-led-on {
+ 
+ 	pmic {
+ 		pmic_int_l: pmic-int-l {
+-			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>;
++			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
+ 		};
+ 	};
+ 
+-- 
+2.30.2
+
diff --git a/debian/patches/features/arm64/arm64-dts-rockchip-kobol-helios64-Add-mmc-aliases.patch b/debian/patches/features/arm64/arm64-dts-rockchip-kobol-helios64-Add-mmc-aliases.patch
new file mode 100644
index 000000000..ad4b53de9
--- /dev/null
+++ b/debian/patches/features/arm64/arm64-dts-rockchip-kobol-helios64-Add-mmc-aliases.patch
@@ -0,0 +1,30 @@
+From: Uwe Kleine-König <ukleinek@debian.org>
+Date: Wed, 29 Mar 2021 09:45:58 +0100
+Subject: arm64: dts: rockchip: kobol-helios64: Add mmc aliases
+
+This patch is part of commit 5dcbe7e3862d ("arm64: dts: rockchip: move mmc
+aliases to board dts on rk3399") upstream. It is applied here only for Kobol's
+helios64 to simplify conflict resolution for some further patches. It currently
+is a noop as the same aliases already exist in rk3399.dtsi.
+
+Link: https://lore.kernel.org/r/20210324122235.1059292-7-heiko@sntech.de
+---
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+index 66c725a34220..19485b552bc4 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts
+@@ -18,6 +18,11 @@ / {
+ 	model = "Kobol Helios64";
+ 	compatible = "kobol,helios64", "rockchip,rk3399";
+ 
++	aliases {
++		mmc0 = &sdmmc;
++		mmc1 = &sdhci;
++	};
++
+ 	avdd_1v8_s0: avdd-1v8-s0 {
+ 		compatible = "regulator-fixed";
+ 		regulator-name = "avdd_1v8_s0";
+-- 
+2.30.2
+
diff --git a/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch b/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch
new file mode 100644
index 000000000..1840fc4bd
--- /dev/null
+++ b/debian/patches/features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch
@@ -0,0 +1,85 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Wed, 21 Aug 2019 00:32:16 +0100
+Subject: intel-iommu: Add Kconfig option to exclude iGPU by default
+Bug-Debian: https://bugs.debian.org/935270
+Bug-Kali: https://bugs.kali.org/view.php?id=5644
+
+There is still laptop firmware that touches the integrated GPU behind
+the operating system's back, and doesn't say so in the RMRR table.
+Enabling the IOMMU for all devices causes breakage.
+
+Replace CONFIG_INTEL_IOMMU_DEFAULT_ON with a 3-way choice
+corresponding to "on", "off", and "on,intgpu_off".
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+--- a/drivers/iommu/intel/Kconfig
++++ b/drivers/iommu/intel/Kconfig
+@@ -45,14 +45,28 @@ config INTEL_IOMMU_SVM
+ 	  to access DMA resources through process address space by
+ 	  means of a Process Address Space ID (PASID).
+ 
+-config INTEL_IOMMU_DEFAULT_ON
+-	def_bool y
+-	prompt "Enable Intel DMA Remapping Devices by default"
+-	depends on INTEL_IOMMU
++if INTEL_IOMMU
++
++choice
++	prompt "Default state of Intel DMA Remapping Devices"
++	default INTEL_IOMMU_DEFAULT_ON
+ 	help
+-	  Selecting this option will enable a DMAR device at boot time if
+-	  one is found. If this option is not selected, DMAR support can
+-	  be enabled by passing intel_iommu=on to the kernel.
++	  Choose whether Intel DMA Remapping Devices should be enabled
++	  by default. This can be overridden at boot time using the
++	  intel_iommu= kernel parameter.
++
++config INTEL_IOMMU_DEFAULT_ON
++	bool "Enable"
++
++config INTEL_IOMMU_DEFAULT_ON_INTGPU_OFF
++	bool "Enable, excluding integrated GPU"
++
++config INTEL_IOMMU_DEFAULT_OFF
++	bool "Disable"
++
++endchoice
++
++endif
+ 
+ config INTEL_IOMMU_BROKEN_GFX_WA
+ 	bool "Workaround broken graphics drivers (going away soon)"
+--- a/drivers/iommu/intel/iommu.c
++++ b/drivers/iommu/intel/iommu.c
+@@ -338,11 +338,7 @@ static int intel_iommu_attach_device(str
+ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
+ 					    dma_addr_t iova);
+ 
+-#ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON
+-int dmar_disabled = 0;
+-#else
+-int dmar_disabled = 1;
+-#endif /* CONFIG_INTEL_IOMMU_DEFAULT_ON */
++int dmar_disabled = IS_ENABLED(CONFIG_INTEL_IOMMU_DEFAULT_OFF);
+ 
+ #ifdef CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON
+ int intel_iommu_sm = 1;
+@@ -354,7 +350,7 @@ int intel_iommu_enabled = 0;
+ EXPORT_SYMBOL_GPL(intel_iommu_enabled);
+ 
+ static int dmar_map_gfx = 1;
+-static int dmar_map_intgpu = 1;
++static int dmar_map_intgpu = IS_ENABLED(CONFIG_INTEL_IOMMU_DEFAULT_ON);
+ static int dmar_forcedac;
+ static int intel_iommu_strict;
+ static int intel_iommu_superpage = 1;
+@@ -442,6 +438,7 @@ static int __init intel_iommu_setup(char
+ 	while (*str) {
+ 		if (!strncmp(str, "on", 2)) {
+ 			dmar_disabled = 0;
++			dmar_map_intgpu = 1;
+ 			pr_info("IOMMU enabled\n");
+ 		} else if (!strncmp(str, "off", 3)) {
+ 			dmar_disabled = 1;
diff --git a/debian/patches/features/x86/intel-iommu-add-option-to-exclude-integrated-gpu-only.patch b/debian/patches/features/x86/intel-iommu-add-option-to-exclude-integrated-gpu-only.patch
new file mode 100644
index 000000000..1717d8fe2
--- /dev/null
+++ b/debian/patches/features/x86/intel-iommu-add-option-to-exclude-integrated-gpu-only.patch
@@ -0,0 +1,91 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Wed, 21 Aug 2019 00:05:30 +0100
+Subject: intel-iommu: Add option to exclude integrated GPU only
+Bug-Debian: https://bugs.debian.org/935270
+Bug-Kali: https://bugs.kali.org/view.php?id=5644
+
+There is still laptop firmware that touches the integrated GPU behind
+the operating system's back, and doesn't say so in the RMRR table.
+Enabling the IOMMU for all devices causes breakage, but turning it off
+for all graphics devices seems like a major weakness.
+
+Add an option, intel_iommu=igpu_off, to exclude only integrated GPUs
+from remapping.  This is a narrower exclusion than igfx_off: it only
+affects Intel devices on the root bus.  Devices attached through an
+external port (Thunderbolt or ExpressCard) won't be on the root bus.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+ Documentation/admin-guide/kernel-parameters.txt |  2 ++
+ drivers/iommu/intel/iommu.c                     | 14 ++++++++++++++
+ 2 files changed, 16 insertions(+)
+
+--- a/Documentation/admin-guide/kernel-parameters.txt
++++ b/Documentation/admin-guide/kernel-parameters.txt
+@@ -1837,6 +1837,8 @@
+ 			bypassed by not enabling DMAR with this option. In
+ 			this case, gfx device will use physical address for
+ 			DMA.
++		intgpu_off [Default Off]
++			Bypass the DMAR unit for an integrated GPU only.
+ 		forcedac [X86-64]
+ 			With this option iommu will not optimize to look
+ 			for io virtual address below 32-bit forcing dual
+--- a/drivers/iommu/intel/iommu.c
++++ b/drivers/iommu/intel/iommu.c
+@@ -54,6 +54,9 @@
+ #define CONTEXT_SIZE		VTD_PAGE_SIZE
+ 
+ #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
++#define IS_INTGPU_DEVICE(pdev) (IS_GFX_DEVICE(pdev) &&		\
++				(pdev)->vendor == 0x8086 &&	\
++				pci_is_root_bus((pdev)->bus))
+ #define IS_USB_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_SERIAL_USB)
+ #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA)
+ #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e)
+@@ -351,6 +354,7 @@ int intel_iommu_enabled = 0;
+ EXPORT_SYMBOL_GPL(intel_iommu_enabled);
+ 
+ static int dmar_map_gfx = 1;
++static int dmar_map_intgpu = 1;
+ static int dmar_forcedac;
+ static int intel_iommu_strict;
+ static int intel_iommu_superpage = 1;
+@@ -360,6 +364,7 @@ static int iommu_skip_te_disable;
+ 
+ #define IDENTMAP_GFX		2
+ #define IDENTMAP_AZALIA		4
++#define IDENTMAP_INTGPU		8
+ 
+ int intel_iommu_gfx_mapped;
+ EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped);
+@@ -445,6 +450,9 @@ static int __init intel_iommu_setup(char
+ 		} else if (!strncmp(str, "igfx_off", 8)) {
+ 			dmar_map_gfx = 0;
+ 			pr_info("Disable GFX device mapping\n");
++		} else if (!strncmp(str, "intgpu_off", 8)) {
++			dmar_map_intgpu = 0;
++			pr_info("Disable integrated GPU device mapping\n");
+ 		} else if (!strncmp(str, "forcedac", 8)) {
+ 			pr_info("Forcing DAC for PCI devices\n");
+ 			dmar_forcedac = 1;
+@@ -2890,6 +2898,9 @@ static int device_def_domain_type(struct
+ 
+ 		if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev))
+ 			return IOMMU_DOMAIN_IDENTITY;
++
++		if ((iommu_identity_mapping & IDENTMAP_INTGPU) && IS_INTGPU_DEVICE(pdev))
++			return IOMMU_DOMAIN_IDENTITY;
+ 	}
+ 
+ 	return 0;
+@@ -3325,6 +3336,9 @@ static int __init init_dmars(void)
+ 	if (!dmar_map_gfx)
+ 		iommu_identity_mapping |= IDENTMAP_GFX;
+ 
++	if (!dmar_map_intgpu)
++		iommu_identity_mapping |= IDENTMAP_INTGPU;
++
+ 	check_tylersburg_isoch();
+ 
+ 	ret = si_domain_init(hw_pass_through);
diff --git a/debian/patches/features/x86/x86-make-x32-syscall-support-conditional.patch b/debian/patches/features/x86/x86-make-x32-syscall-support-conditional.patch
new file mode 100644
index 000000000..62731a997
--- /dev/null
+++ b/debian/patches/features/x86/x86-make-x32-syscall-support-conditional.patch
@@ -0,0 +1,193 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Mon, 12 Feb 2018 23:59:26 +0000
+Subject: x86: Make x32 syscall support conditional on a kernel parameter
+Bug-Debian: https://bugs.debian.org/708070
+Forwarded: https://lore.kernel.org/lkml/1415245982.3398.53.camel@decadent.org.uk/T/#u
+
+Enabling x32 in the standard amd64 kernel would increase its attack
+surface while provide no benefit to the vast majority of its users.
+No-one seems interested in regularly checking for vulnerabilities
+specific to x32 (at least no-one with a white hat).
+
+Still, adding another flavour just to turn on x32 seems wasteful.  And
+the only differences on syscall entry are a few instructions that mask
+out the x32 flag and compare the syscall number.
+
+Use a static key to control whether x32 syscalls are really enabled, a
+Kconfig parameter to set its default value and a kernel parameter
+"syscall.x32" to change it at boot time.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+ .../admin-guide/kernel-parameters.txt         |  4 ++
+ arch/x86/Kconfig                              |  8 ++++
+ arch/x86/entry/common.c                       |  3 +-
+ arch/x86/entry/syscall_64.c                   | 46 +++++++++++++++++++
+ arch/x86/include/asm/elf.h                    |  6 ++-
+ arch/x86/include/asm/syscall.h                | 13 ++++++
+ 6 files changed, 78 insertions(+), 2 deletions(-)
+
+Index: debian-kernel/Documentation/admin-guide/kernel-parameters.txt
+===================================================================
+--- debian-kernel.orig/Documentation/admin-guide/kernel-parameters.txt
++++ debian-kernel/Documentation/admin-guide/kernel-parameters.txt
+@@ -5000,6 +5000,10 @@
+ 			later by a loaded module cannot be set this way.
+ 			Example: sysctl.vm.swappiness=40
+ 
++	syscall.x32=	[KNL,x86_64] Enable/disable use of x32 syscalls on
++			an x86_64 kernel where CONFIG_X86_X32 is enabled.
++			Default depends on CONFIG_X86_X32_DISABLED.
++
+ 	sysfs.deprecated=0|1 [KNL]
+ 			Enable/disable old style sysfs layout for old udev
+ 			on older distributions. When this option is enabled
+Index: debian-kernel/arch/x86/Kconfig
+===================================================================
+--- debian-kernel.orig/arch/x86/Kconfig
++++ debian-kernel/arch/x86/Kconfig
+@@ -2888,6 +2888,14 @@ config COMPAT_32
+ 	select HAVE_UID16
+ 	select OLD_SIGSUSPEND3
+ 
++config X86_X32_DISABLED
++	bool "x32 ABI disabled by default"
++	depends on X86_X32
++	default n
++	help
++	  Disable the x32 ABI unless explicitly enabled using the
++	  kernel paramter "syscall.x32=y".
++
+ config COMPAT
+ 	def_bool y
+ 	depends on IA32_EMULATION || X86_X32
+Index: debian-kernel/arch/x86/entry/common.c
+===================================================================
+--- debian-kernel.orig/arch/x86/entry/common.c
++++ debian-kernel/arch/x86/entry/common.c
+@@ -383,7 +383,8 @@ __visible noinstr void do_syscall_64(uns
+ 		nr = array_index_nospec(nr, NR_syscalls);
+ 		regs->ax = sys_call_table[nr](regs);
+ #ifdef CONFIG_X86_X32_ABI
+-	} else if (likely((nr & __X32_SYSCALL_BIT) &&
++	} else if (x32_enabled &&
++		   likely((nr & __X32_SYSCALL_BIT) &&
+ 			  (nr & ~__X32_SYSCALL_BIT) < X32_NR_syscalls)) {
+ 		nr = array_index_nospec(nr & ~__X32_SYSCALL_BIT,
+ 					X32_NR_syscalls);
+Index: debian-kernel/arch/x86/entry/syscall_x32.c
+===================================================================
+--- debian-kernel.orig/arch/x86/entry/syscall_x32.c
++++ debian-kernel/arch/x86/entry/syscall_x32.c
+@@ -4,6 +4,9 @@
+ #include <linux/linkage.h>
+ #include <linux/sys.h>
+ #include <linux/cache.h>
++#include <linux/moduleparam.h>
++#undef MODULE_PARAM_PREFIX
++#define MODULE_PARAM_PREFIX "syscall."
+ #include <linux/syscalls.h>
+ #include <asm/unistd.h>
+ #include <asm/syscall.h>
+@@ -27,3 +30,46 @@ asmlinkage const sys_call_ptr_t x32_sys_
+ 	[0 ... __NR_x32_syscall_max] = &__x64_sys_ni_syscall,
+ #include <asm/syscalls_64.h>
+ };
++
++/* Maybe enable x32 syscalls */
++
++#if defined(CONFIG_X86_X32_DISABLED)
++DEFINE_STATIC_KEY_FALSE(x32_enabled_skey);
++#else
++DEFINE_STATIC_KEY_TRUE(x32_enabled_skey);
++#endif
++
++static int __init x32_param_set(const char *val, const struct kernel_param *p)
++{
++	bool enabled;
++	int ret;
++
++	ret = kstrtobool(val, &enabled);
++	if (ret)
++		return ret;
++	if (IS_ENABLED(CONFIG_X86_X32_DISABLED)) {
++		if (enabled) {
++			static_key_enable(&x32_enabled_skey.key);
++			pr_info("Enabled x32 syscalls\n");
++		}
++	} else {
++		if (!enabled) {
++			static_key_disable(&x32_enabled_skey.key);
++			pr_info("Disabled x32 syscalls\n");
++		}
++	}
++	return 0;
++}
++
++static int x32_param_get(char *buffer, const struct kernel_param *p)
++{
++	return sprintf(buffer, "%c\n",
++		       static_key_enabled(&x32_enabled_skey) ? 'Y' : 'N');
++}
++
++static const struct kernel_param_ops x32_param_ops = {
++	.set = x32_param_set,
++	.get = x32_param_get,
++};
++
++arch_param_cb(x32, &x32_param_ops, NULL, 0444);
+Index: debian-kernel/arch/x86/include/asm/elf.h
+===================================================================
+--- debian-kernel.orig/arch/x86/include/asm/elf.h
++++ debian-kernel/arch/x86/include/asm/elf.h
+@@ -11,6 +11,9 @@
+ #include <asm/user.h>
+ #include <asm/auxvec.h>
+ #include <asm/fsgsbase.h>
++#ifndef COMPILE_OFFSETS /* avoid a circular dependency on asm-offsets.h */
++#include <asm/syscall.h>
++#endif
+ 
+ typedef unsigned long elf_greg_t;
+ 
+@@ -163,7 +166,8 @@ do {						\
+ 
+ #define compat_elf_check_arch(x)					\
+ 	(elf_check_arch_ia32(x) ||					\
+-	 (IS_ENABLED(CONFIG_X86_X32_ABI) && (x)->e_machine == EM_X86_64))
++	 (IS_ENABLED(CONFIG_X86_X32_ABI) && x32_enabled &&		\
++	  (x)->e_machine == EM_X86_64))
+ 
+ #if __USER32_DS != __USER_DS
+ # error "The following code assumes __USER32_DS == __USER_DS"
+Index: debian-kernel/arch/x86/include/asm/syscall.h
+===================================================================
+--- debian-kernel.orig/arch/x86/include/asm/syscall.h
++++ debian-kernel/arch/x86/include/asm/syscall.h
+@@ -13,6 +13,7 @@
+ #include <uapi/linux/audit.h>
+ #include <linux/sched.h>
+ #include <linux/err.h>
++#include <linux/jump_label.h>
+ #include <asm/thread_info.h>	/* for TS_COMPAT */
+ #include <asm/unistd.h>
+ 
+@@ -31,6 +32,18 @@ extern const sys_call_ptr_t ia32_sys_cal
+ extern const sys_call_ptr_t x32_sys_call_table[];
+ #endif
+ 
++#if defined(CONFIG_X86_X32_ABI)
++#if defined(CONFIG_X86_X32_DISABLED)
++DECLARE_STATIC_KEY_FALSE(x32_enabled_skey);
++#define x32_enabled static_branch_unlikely(&x32_enabled_skey)
++#else
++DECLARE_STATIC_KEY_TRUE(x32_enabled_skey);
++#define x32_enabled static_branch_likely(&x32_enabled_skey)
++#endif
++#else
++#define x32_enabled 0
++#endif
++
+ /*
+  * Only the low 32 bits of orig_ax are meaningful, so we return int.
+  * This importantly ignores the high bits on 64-bit, so comparisons
diff --git a/debian/patches/features/x86/x86-memtest-WARN-if-bad-RAM-found.patch b/debian/patches/features/x86/x86-memtest-WARN-if-bad-RAM-found.patch
new file mode 100644
index 000000000..7a7952003
--- /dev/null
+++ b/debian/patches/features/x86/x86-memtest-WARN-if-bad-RAM-found.patch
@@ -0,0 +1,28 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Mon, 5 Dec 2011 04:00:58 +0000
+Subject: x86: memtest: WARN if bad RAM found
+Bug-Debian: https://bugs.debian.org/613321
+Forwarded: http://thread.gmane.org/gmane.linux.kernel/1286471
+
+Since this is not a particularly thorough test, if we find any bad
+bits of RAM then there is a fair chance that there are other bad bits
+we fail to detect.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+ mm/memtest.c |    2 ++
+ 1 files changed, 2 insertions(+), 0 deletions(-)
+
+--- a/mm/memtest.c
++++ b/mm/memtest.c
+@@ -26,6 +26,10 @@ static u64 patterns[] __initdata = {
+ 
+ static void __init reserve_bad_mem(u64 pattern, phys_addr_t start_bad, phys_addr_t end_bad)
+ {
++#ifdef CONFIG_X86
++	WARN_ONCE(1, "Bad RAM detected. Use memtest86+ to perform a thorough test\n"
++		  "and the memmap= parameter to reserve the bad areas.");
++#endif
+ 	pr_info("  %016llx bad mem addr %pa - %pa reserved\n",
+ 		cpu_to_be64(pattern), &start_bad, &end_bad);
+ 	memblock_reserve(start_bad, end_bad - start_bad);