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.garr...@nebula.com>
---
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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