cgroups: fix possible use after free

[safe/jmp/linux-2.6] / kernel / cgroup.c

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index e14db9c..9edb5c4 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1122,8 +1122,8 @@ static void cgroup_kill_sb(struct super_block *sb) {
 
        mutex_unlock(&cgroup_mutex);
 
-       kfree(root);
        kill_litter_super(sb);
+       kfree(root);
 }
 
 static struct file_system_type cgroup_fs_type = {