diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2015-11-17 15:10:59 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-17 15:25:45 -0500 |
| commit | a3a116e04cc6a94d595ead4e956ab1bc1d2f4746 (patch) | |
| tree | 311448a945154e0247d25366a786e9c4bddbf197 /net/unix | |
| parent | b22b941b2c253a20e1d000c671594c4f3f0a3858 (diff) | |
| download | lwn-a3a116e04cc6a94d595ead4e956ab1bc1d2f4746.tar.gz lwn-a3a116e04cc6a94d595ead4e956ab1bc1d2f4746.zip | |
af_unix: take receive queue lock while appending new skb
While possibly in future we don't necessarily need to use
sk_buff_head.lock this is a rather larger change, as it affects the
af_unix fd garbage collector, diag and socket cleanups. This is too much
for a stable patch.
For the time being grab sk_buff_head.lock without disabling bh and irqs,
so don't use locked skb_queue_tail.
Fixes: 869e7c62486e ("net: af_unix: implement stream sendpage support")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reported-by: Eric Dumazet <edumazet@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
| -rw-r--r-- | net/unix/af_unix.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index a8352db5c5b5..955ec152cb71 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1813,8 +1813,11 @@ alloc_skb: skb->truesize += size; atomic_add(size, &sk->sk_wmem_alloc); - if (newskb) + if (newskb) { + spin_lock(&other->sk_receive_queue.lock); __skb_queue_tail(&other->sk_receive_queue, newskb); + spin_unlock(&other->sk_receive_queue.lock); + } unix_state_unlock(other); mutex_unlock(&unix_sk(other)->readlock); |