[PATCH 42/43] userns: Convert cgroup permission checks to use uid_eq

["Eric W. Beiderman]

From: Eric W. Biederman <ebiederm at xmission.com>

Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>
---
 kernel/cgroup.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index ed64cca..c8329b0 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2160,9 +2160,9 @@ retry_find_task:
 		 * only need to check permissions on one of them.
 		 */
 		tcred = __task_cred(tsk);
-		if (cred->euid &&
-		    cred->euid != tcred->uid &&
-		    cred->euid != tcred->suid) {
+		if (!uid_eq(cred->euid, GLOBAL_ROOT_UID) &&
+		    !uid_eq(cred->euid, tcred->uid) &&
+		    !uid_eq(cred->euid, tcred->suid)) {
 			rcu_read_unlock();
 			ret = -EACCES;
 			goto out_unlock_cgroup;
-- 
1.7.2.5