[PATCH 08/27] hibernate: Disable when the kernel is locked down

Matthew Garrett matthewgarrett at google.com
Mon Mar 25 22:09:35 UTC 2019

From: Josh Boyer <jwboyer at fedoraproject.org>

There is currently no way to verify the resume image when returning
from hibernate.  This might compromise the signed modules trust model,
so until we can work with signed hibernate images we disable it when the
kernel is locked down.

Signed-off-by: Josh Boyer <jwboyer at fedoraproject.org>
Signed-off-by: David Howells <dhowells at redhat.com>
Cc: rjw at rjwysocki.net
Cc: pavel at ucw.cz
cc: linux-pm at vger.kernel.org
Signed-off-by: Matthew Garrett <matthewgarrett at google.com>
 kernel/power/hibernate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index abef759de7c8..802795becb88 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -70,7 +70,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
 bool hibernation_available(void)
-	return (nohibernate == 0);
+	return nohibernate == 0 && !kernel_is_locked_down("Hibernation");

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