diff options
| author | Kees Cook <keescook@chromium.org> | 2016-04-21 01:46:28 +0300 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2016-04-21 03:47:27 +0300 |
| commit | 9b091556a073a9f5f93e2ad23d118f45c4796a84 (patch) | |
| tree | 075fffff80b5caad9738f633c83333dea9e04efd /security/loadpin/Kconfig | |
| parent | 1284ab5b2dcb927d38e4f3fbc2e307f3d1af9262 (diff) | |
| download | linux-9b091556a073a9f5f93e2ad23d118f45c4796a84.tar.xz | |
LSM: LoadPin for kernel file loading restrictions
This LSM enforces that kernel-loaded files (modules, firmware, etc)
must all come from the same filesystem, with the expectation that
such a filesystem is backed by a read-only device such as dm-verity
or CDROM. This allows systems that have a verified and/or unchangeable
filesystem to enforce module and firmware loading restrictions without
needing to sign the files individually.
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security/loadpin/Kconfig')
| -rw-r--r-- | security/loadpin/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/security/loadpin/Kconfig b/security/loadpin/Kconfig new file mode 100644 index 000000000000..c668ac4eda65 --- /dev/null +++ b/security/loadpin/Kconfig @@ -0,0 +1,10 @@ +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) will + be pinned to the first filesystem used for loading. 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. |