diff mbox series

[V31,08/25] hibernate: Disable when the kernel is locked down

Message ID 20190326182742.16950-9-matthewgarrett@google.com (mailing list archive)
State New, archived
Headers show
Series Add support for kernel lockdown | expand

Commit Message

Matthew Garrett March 26, 2019, 6:27 p.m. UTC 
From: Josh Boyer <jwboyer@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@fedoraproject.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Garrett <mjg59@google.com>
Cc: rjw@rjwysocki.net
Cc: pavel@ucw.cz
cc: linux-pm@vger.kernel.org
---
 kernel/power/hibernate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index abef759de7c8..928b198cfa26 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -70,7 +70,8 @@  static const struct platform_hibernation_ops *hibernation_ops;
 
 bool hibernation_available(void)
 {
-	return (nohibernate == 0);
+	return nohibernate == 0 && !kernel_is_locked_down("Hibernation",
+							  LOCKDOWN_INTEGRITY);
 }
 
 /**