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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /security/loadpin/Kconfig
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+# SPDX-License-Identifier: GPL-2.0-only
+config SECURITY_LOADPIN
+ bool "Pin load of kernel files (modules, fw, etc) to one filesystem"
+ depends on SECURITY && BLOCK
+ help
+ Any files read through the kernel file reading interface
+ (kernel modules, firmware, kexec images, security policy)
+ can be pinned to the first filesystem used for loading. When
+ enabled, any files that come from other filesystems will be
+ rejected. This is best used on systems without an initrd that
+ have a root filesystem backed by a read-only device such as
+ dm-verity or a CDROM.
+
+config SECURITY_LOADPIN_ENFORCE
+ bool "Enforce LoadPin at boot"
+ depends on SECURITY_LOADPIN
+ help
+ If selected, LoadPin will enforce pinning at boot. If not
+ selected, it can be enabled at boot with the kernel parameter
+ "loadpin.enforce=1".
+
+config SECURITY_LOADPIN_VERITY
+ bool "Allow reading files from certain other filesystems that use dm-verity"
+ depends on SECURITY_LOADPIN && DM_VERITY=y && SECURITYFS
+ help
+ If selected LoadPin can allow reading files from filesystems
+ that use dm-verity. LoadPin maintains a list of verity root
+ digests it considers trusted. A verity backed filesystem is
+ considered trusted if its root digest is found in the list
+ of trusted digests.
+
+ The list of trusted verity can be populated through an ioctl
+ on the LoadPin securityfs entry 'dm-verity'. The ioctl
+ expects a file descriptor of a file with verity digests as
+ parameter. The file must be located on the pinned root and
+ start with the line:
+
+ # LOADPIN_TRUSTED_VERITY_ROOT_DIGESTS
+
+ This is followed by the verity digests, with one digest per
+ line.