From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Mon, 18 Feb 2019 12:44:59 +0000 (+0000)
Subject: hibernate: Disable when the kernel is locked down
X-Git-Tag: archive/raspbian/5.2.17-1+rpi1^2~51
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=71f8aa7cf357170dc5a2f71508dbc641060438bd;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 0010-hibernate-Disable-when-the-kernel-is-locked-down.patch
---

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index cd7434e6000..0f30de4a712 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -68,7 +68,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
 
 bool hibernation_available(void)
 {
-	return (nohibernate == 0);
+	return nohibernate == 0 && !kernel_is_locked_down("Hibernation");
 }
 
 /**