[PATCH] loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression

[Stephen Boyd]

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 at gmail.com>
Cc: Douglas Anderson <dianders at chromium.org>
Signed-off-by: Stephen Boyd <swboyd at chromium.org>
---
 security/loadpin/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/security/loadpin/Kconfig b/security/loadpin/Kconfig
index 6724eaba3d36..8c22171088a7 100644
--- a/security/loadpin/Kconfig
+++ b/security/loadpin/Kconfig
@@ -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 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

base-commit: 4cece764965020c22cff7665b18a012006359095
-- 
https://chromeos.dev