Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...

[firefly-linux-kernel-4.4.55.git] / security / device_cgroup.c

diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 19ecc8de9e6bfd837e2589546fdfe49b04b23ed0..d794abcc4b3b7e5e87173ba8ca45deca5b6d09d8 100644 (file)
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -215,7 +215,9 @@ static void devcgroup_css_free(struct cgroup *cgroup)
        struct dev_cgroup *dev_cgroup;
 
        dev_cgroup = cgroup_to_devcgroup(cgroup);
+       mutex_lock(&devcgroup_mutex);
        dev_exception_clean(dev_cgroup);
+       mutex_unlock(&devcgroup_mutex);
        kfree(dev_cgroup);
 }