Adding debian version 4.19.249-2.debian/4.19.249-2debian

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

1 files changed, 83 insertions, 0 deletions

diff --git a/debian/patches-rt/0223-crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch b/debian/patches-rt/0223-crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch
new file mode 100644
index 000000000..e7be12f3f
--- /dev/null
+++ b/debian/patches-rt/0223-crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch
@@ -0,0 +1,83 @@
+From fe05a8e53c2f5560f734ab76a4527bab302e88c0 Mon Sep 17 00:00:00 2001
+From: Mike Galbraith <efault@gmx.de>
+Date: Wed, 11 Jul 2018 17:14:47 +0200
+Subject: [PATCH 223/347] crypto: scompress - serialize RT percpu scratch
+ buffer access with a local lock
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+| BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:974
+| in_atomic(): 1, irqs_disabled(): 0, pid: 1401, name: cryptomgr_test
+| Preemption disabled at:
+| [<ffff00000849941c>] scomp_acomp_comp_decomp+0x34/0x1a0
+| CPU: 21 PID: 1401 Comm: cryptomgr_test Tainted: G        W        4.16.18-rt9-rt #1
+| Hardware name: www.cavium.com crb-1s/crb-1s, BIOS 0.3 Apr 25 2017
+| Call trace:
+|  dump_backtrace+0x0/0x1c8
+|  show_stack+0x24/0x30
+|  dump_stack+0xac/0xe8
+|  ___might_sleep+0x124/0x188
+|  rt_spin_lock+0x40/0x88
+|  zip_load_instr+0x44/0x170 [thunderx_zip]
+|  zip_deflate+0x184/0x378 [thunderx_zip]
+|  zip_compress+0xb0/0x130 [thunderx_zip]
+|  zip_scomp_compress+0x48/0x60 [thunderx_zip]
+|  scomp_acomp_comp_decomp+0xd8/0x1a0
+|  scomp_acomp_compress+0x24/0x30
+|  test_acomp+0x15c/0x558
+|  alg_test_comp+0xc0/0x128
+|  alg_test.part.6+0x120/0x2c0
+|  alg_test+0x6c/0xa0
+|  cryptomgr_test+0x50/0x58
+|  kthread+0x134/0x138
+|  ret_from_fork+0x10/0x18
+
+Mainline disables preemption to serialize percpu scratch buffer access,
+causing the splat above.  Serialize with a local lock for RT instead.
+
+Signed-off-by: Mike Galbraith <efault@gmx.de>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ crypto/scompress.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/crypto/scompress.c b/crypto/scompress.c
+index 968bbcf65c94..c2f0077e0801 100644
+--- a/crypto/scompress.c
++++ b/crypto/scompress.c
+@@ -24,6 +24,7 @@
+ #include <linux/cryptouser.h>
+ #include <net/netlink.h>
+ #include <linux/scatterlist.h>
++#include <linux/locallock.h>
+ #include <crypto/scatterwalk.h>
+ #include <crypto/internal/acompress.h>
+ #include <crypto/internal/scompress.h>
+@@ -34,6 +35,7 @@ static void * __percpu *scomp_src_scratches;
+ static void * __percpu *scomp_dst_scratches;
+ static int scomp_scratch_users;
+ static DEFINE_MUTEX(scomp_lock);
++static DEFINE_LOCAL_IRQ_LOCK(scomp_scratches_lock);
+ 
+ #ifdef CONFIG_NET
+ static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg)
+@@ -146,7 +148,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
+ 	void **tfm_ctx = acomp_tfm_ctx(tfm);
+ 	struct crypto_scomp *scomp = *tfm_ctx;
+ 	void **ctx = acomp_request_ctx(req);
+-	const int cpu = get_cpu();
++	const int cpu = local_lock_cpu(scomp_scratches_lock);
+ 	u8 *scratch_src = *per_cpu_ptr(scomp_src_scratches, cpu);
+ 	u8 *scratch_dst = *per_cpu_ptr(scomp_dst_scratches, cpu);
+ 	int ret;
+@@ -181,7 +183,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
+ 					 1);
+ 	}
+ out:
+-	put_cpu();
++	local_unlock_cpu(scomp_scratches_lock);
+ 	return ret;
+ }
+ 
+-- 
+2.36.1
+