From: David Howells <dhowells@redhat.com>
Date: Wed, 5 Apr 2017 16:40:30 +0000 (+0100)
Subject: Enforce module signatures if the kernel is locked down
X-Git-Tag: archive/raspbian/4.15.4-1+rpi1~1^2^2~68
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c037a2c7df4bd0d933fcc3844462674ed4b834bf;p=linux.git

Enforce module signatures if the kernel is locked down

If the kernel is locked down, require that all modules have valid
signatures that we can verify.

Signed-off-by: David Howells <dhowells@redhat.com>

Gbp-Pq: Topic features/all/lockdown
Gbp-Pq: Name 0041-Enforce-module-signatures-if-the-kernel-is-locked-do.patch
---

diff --git a/kernel/module.c b/kernel/module.c
index de66ec82599..0ebd1a50322 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2781,7 +2781,7 @@ 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 && !kernel_is_locked_down())
 		err = 0;
 
 	return err;