Commit ce0d73ef authored by Stephen Boyd's avatar Stephen Boyd Committed by Kees Cook
Browse files

loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression 



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: default avatarStephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20240514224839.2526112-1-swboyd@chromium.org


Signed-off-by: default avatarKees Cook <keescook@chromium.org>
parent 6d305cbe

security/loadpin/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -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