Thread (146 messages) 146 messages, 15 authors, 2017-12-07

[PATCH 03/27] Enforce module signatures if the kernel is locked down

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From: jlee@suse.com (joeyli)
Date: 2017-10-20 06:33:36
Also in: linux-efi, lkml

Hi David,

Thanks for you send our this series.

On Thu, Oct 19, 2017 at 03:50:55PM +0100, David Howells wrote:
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>
I have reviewed and tested this patch. Please feel free to add:

Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>

Thanks a lot!
Joey Lee
quoted hunk ↗ jump to hunk
---

 kernel/module.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/module.c b/kernel/module.c
index de66ec825992..3d9a3270c179 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2781,7 +2781,8 @@ 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("Loading of unsigned modules"))
 		err = 0;
 
 	return err;

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