diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-10-11 05:12:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-18 13:30:35 +0300 |
| commit | a74512a1739dfaee2397356451adf53b40798a94 (patch) | |
| tree | 832d261355bfdf1894bdd2bd48061a645c90a9a7 | |
| parent | ad1263b5ac01b65db6f9af996550be771dc9581f (diff) | |
| download | linux-a74512a1739dfaee2397356451adf53b40798a94.tar.xz | |
net: call cgroup_sk_alloc() earlier in sk_clone_lock()
[ Upstream commit c0576e3975084d4699b7bfef578613fb8e1144f6 ]
If for some reason, the newly allocated child need to be freed,
we will call cgroup_put() (via sk_free_unlock_clone()) while the
corresponding cgroup_get() was not yet done, and we will free memory
too soon.
Fixes: d979a39d7242 ("cgroup: duplicate cgroup reference when cloning sockets")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/sock.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 0967da925022..e48424ddbc6b 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1674,6 +1674,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_userlocks = sk->sk_userlocks & ~SOCK_BINDPORT_LOCK; sock_reset_flag(newsk, SOCK_DONE); + cgroup_sk_alloc(&newsk->sk_cgrp_data); rcu_read_lock(); filter = rcu_dereference(sk->sk_filter); @@ -1706,8 +1707,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) atomic64_set(&newsk->sk_cookie, 0); mem_cgroup_sk_alloc(newsk); - cgroup_sk_alloc(&newsk->sk_cgrp_data); - /* * Before updating sk_refcnt, we must commit prior changes to memory * (Documentation/RCU/rculist_nulls.txt for details) |