From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Wed, 8 Nov 2017 15:11:33 +0000 (+0000)
Subject: hibernate: Disable when the kernel is locked down
X-Git-Tag: archive/raspbian/4.18.20-2+rpi1^2~41
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=39be8579e178cedbdabb72ef7087beaab2605cea;p=linux.git

hibernate: Disable when the kernel is locked down

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@fedoraproject.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>
cc: linux-pm@vger.kernel.org

Gbp-Pq: Topic features/all/lockdown
Gbp-Pq: Name 0009-hibernate-Disable-when-the-kernel-is-locked-down.patch
---

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 9c85c782238..08d3d2e8680 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");
 }
 
 /**