linux-kernel - [PATCH 02/12] Enforce module signatures when securelevel is greater than 0

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Date:	Mon,  9 Sep 2013 11:49:36 -0400
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	linux-kernel@...r.kernel.org
Cc:	keescook@...omium.org, gregkh@...uxfoundation.org, hpa@...or.com,
	linux-efi@...r.kernel.org, jmorris@...ei.org,
	linux-security-module@...r.kernel.org,
	Matthew Garrett <matthew.garrett@...ula.com>
Subject: [PATCH 02/12] Enforce module signatures when securelevel is greater than 0

If securelevel has been set to 1 or greater, require that all modules have
valid signatures.

Signed-off-by: Matthew Garrett <matthew.garrett@...ula.com>
---
 kernel/module.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/module.c b/kernel/module.c
index dc58274..ab126d7 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2487,7 +2487,7 @@ static int module_sig_check(struct load_info *info)
 	if (err < 0 && fips_enabled)
 		panic("Module verification failed with error %d in FIPS mode\n",
 		      err);
-	if (err == -ENOKEY && !sig_enforce)
+	if ((err == -ENOKEY && !sig_enforce) && (get_securelevel() <= 0))
 		err = 0;
 
 	return err;
-- 
1.8.3.1

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