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loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression

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If modules are built compressed, and LoadPin is enforcing by default, we
must have in-kernel module decompression enabled (MODULE_DECOMPRESS).
Modules will fail to load without decompression built into the kernel
because they'll be blocked by LoadPin. Add a depends on clause to
prevent this combination.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20240514224839.2526112-1-swboyd@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Stephen Boyd 2024-05-14 15:48:38 -07:00 committed by Kees Cook
parent 6d305cbef1
commit ce0d73ef8d
1 changed files with 3 additions and 0 deletions
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3
security/loadpin/Kconfig
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@ -14,6 +14,9 @@ config SECURITY_LOADPIN
config SECURITY_LOADPIN_ENFORCE
bool "Enforce LoadPin at boot"
depends on SECURITY_LOADPIN
# Module compression breaks LoadPin unless modules are decompressed in
# the kernel.
depends on !MODULES || (MODULE_COMPRESS_NONE || MODULE_DECOMPRESS)
help
If selected, LoadPin will enforce pinning at boot. If not
selected, it can be enabled at boot with the kernel parameter