3.8.13.9 -stable review patch.  If anyone has any objections, please let me 
know.

------------------

From: Andy Lutomirski <[email protected]>

commit d661684cf6820331feae71146c35da83d794467e upstream.

This is a security bug.

The follow-up will fix nsproxy to discourage this type of issue from
happening again.

Signed-off-by: Andy Lutomirski <[email protected]>
Reviewed-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Kamal Mostafa <[email protected]>
---
 net/core/scm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/scm.c b/net/core/scm.c
index 2dc6cda..7b6d0d9 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -54,7 +54,7 @@ static __inline__ int scm_check_creds(struct ucred *creds)
                return -EINVAL;
 
        if ((creds->pid == task_tgid_vnr(current) ||
-            ns_capable(current->nsproxy->pid_ns->user_ns, CAP_SYS_ADMIN)) &&
+            ns_capable(task_active_pid_ns(current)->user_ns, CAP_SYS_ADMIN)) &&
            ((uid_eq(uid, cred->uid)   || uid_eq(uid, cred->euid) ||
              uid_eq(uid, cred->suid)) || nsown_capable(CAP_SETUID)) &&
            ((gid_eq(gid, cred->gid)   || gid_eq(gid, cred->egid) ||
-- 
1.8.1.2

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