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authorJosh Boyer <jwboyer@fedoraproject.org>2019-08-20 02:17:46 +0200
committerJames Morris <jmorris@namei.org>2019-08-20 06:54:15 +0200
commit38bd94b8a1bd46e6d3d9718c7ff582e4c8ccb440 (patch)
tree72595e412734b2f3642514c01b06e9202b94ce76 /kernel
parentkexec_file: Restrict at runtime if the kernel is locked down (diff)
downloadlinux-38bd94b8a1bd46e6d3d9718c7ff582e4c8ccb440.tar.xz
linux-38bd94b8a1bd46e6d3d9718c7ff582e4c8ccb440.zip
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> Signed-off-by: Matthew Garrett <mjg59@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: rjw@rjwysocki.net Cc: pavel@ucw.cz cc: linux-pm@vger.kernel.org Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/power/hibernate.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index cd7434e6000d..3c0a5a8170b0 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -30,6 +30,7 @@
#include <linux/ctype.h>
#include <linux/genhd.h>
#include <linux/ktime.h>
+#include <linux/security.h>
#include <trace/events/power.h>
#include "power.h"
@@ -68,7 +69,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
bool hibernation_available(void)
{
- return (nohibernate == 0);
+ return nohibernate == 0 && !security_locked_down(LOCKDOWN_HIBERNATION);
}
/**