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(parent: 9828e6e) | patch
tcp: Fix race in tcp_poll
authorTom Marshall <[email protected]>
Mon, 20 Sep 2010 22:42:05 +0000 (15:42 -0700)
committerDavid S. Miller <[email protected]>
Mon, 20 Sep 2010 22:42:05 +0000 (15:42 -0700)
commita4d258036ed9b2a1811c3670c6099203a0f284a0
tree58412022664aef745a99d254d20cf1a66aabda44tree | snapshot
parent9828e6e6e3f19efcb476c567b9999891d051f52fcommit | diff
tcp: Fix race in tcp_poll

If a RST comes in immediately after checking sk->sk_err, tcp_poll will
return POLLIN but not POLLOUT.  Fix this by checking sk->sk_err at the end
of tcp_poll.  Additionally, ensure the correct order of operations on SMP
machines with memory barriers.

Signed-off-by: Tom Marshall <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
net/ipv4/tcp.c diff | blob | blame | history
net/ipv4/tcp_input.c diff | blob | blame | history
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