cred: Refcount the user_ns pointed to by the cred.

struct user_struct will shortly loose it's user_ns reference
so make the cred user_ns reference a proper reference complete
with reference counting.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/cred.h b/include/linux/cred.h
index d12c4e475c15..2c60ec802678 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -146,7 +146,7 @@ struct cred {
         void            *security;      /* subjective LSM security */
 #endif
         struct user_struct *user;       /* real user ID subscription */
-        struct user_namespace *user_ns; /* cached user->user_ns */
+        struct user_namespace *user_ns; /* user_ns the caps and keyrings are relative to. */
         struct group_info *group_info;  /* supplementary groups for euid/fsgid */
         struct rcu_head rcu;            /* RCU deletion hook */
 };