[PATCH 09/12] uswsusp: Disable when trusted_kernel is true

[Matthew Garrett]

uswsusp allows a user process to dump and then restore kernel state, which
makes it possible to modify the running kernel. Disable this if
trusted_kernel is true.

Signed-off-by: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
---
 kernel/power/user.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/power/user.c b/kernel/power/user.c
index 526e891..43b7b59 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -24,6 +24,7 @@
 #include <linux/console.h>
 #include <linux/cpu.h>
 #include <linux/freezer.h>
+#include <linux/security.h>
 
 #include <asm/uaccess.h>
 
@@ -49,7 +50,7 @@ static int snapshot_open(struct inode *inode, struct file *filp)
 	struct snapshot_data *data;
 	int error;
 
-	if (!hibernation_available())
+	if (get_trusted_kernel() || !hibernation_available())
 		return -EPERM;
 
 	lock_system_sleep();
-- 
2.1.0

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