From: Matthew Garrett <mjg59@srcf.ucam.org>
Date: Mon, 9 Sep 2013 12:46:52 +0000 (-0400)
Subject: Enforce module signatures when securelevel is greater than 0
X-Git-Tag: archive/raspbian/4.9.82-1+deb9u3+rpi1_jessie~10^2~49
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=2380ae013f8c2ac5fc9dfa9d86348f6af8b6461f;p=linux-4.9.git

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 <mjg59@srcf.ucam.org>

Gbp-Pq: Topic features/all/securelevel
Gbp-Pq: Name enforce-module-signatures-when-securelevel-is-greate.patch
---

diff --git a/kernel/module.c b/kernel/module.c
index 07bfb9971f2f..fd798970491e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2745,7 +2745,7 @@ static int module_sig_check(struct load_info *info, int flags)
 	}
 
 	/* Not having a signature is only an error if we're strict. */
-	if (err == -ENOKEY && !sig_enforce)
+	if ((err == -ENOKEY && !sig_enforce) && (get_securelevel() <= 0))
 		err = 0;
 
 	return err;