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| author | Eric Dumazet <edumazet@google.com> | 2017-10-10 19:12:33 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-10 20:24:29 -0700 |
| commit | c0576e3975084d4699b7bfef578613fb8e1144f6 (patch) | |
| tree | 3c077a45caeb9a84a3c552bd623034f6b788f7da /net/core/sock.c | |
| parent | 75cb070960ade40fba5de32138390f3c85c90941 (diff) | |
| download | blackbird-obmc-linux-c0576e3975084d4699b7bfef578613fb8e1144f6.tar.gz blackbird-obmc-linux-c0576e3975084d4699b7bfef578613fb8e1144f6.zip | |
net: call cgroup_sk_alloc() earlier in sk_clone_lock()
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>
Diffstat (limited to 'net/core/sock.c')
| -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 70c6ccbdf49f..415f441c63b9 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1687,6 +1687,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) atomic_set(&newsk->sk_zckey, 0); sock_reset_flag(newsk, SOCK_DONE); + cgroup_sk_alloc(&newsk->sk_cgrp_data); rcu_read_lock(); filter = rcu_dereference(sk->sk_filter); @@ -1718,8 +1719,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_incoming_cpu = raw_smp_processor_id(); atomic64_set(&newsk->sk_cookie, 0); - 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) |
