tcp: fix access to sk->sk_state in tcp_poll()
authorDavide Caratti <dcaratti@redhat.com>
Wed, 26 Apr 2017 17:07:35 +0000 (19:07 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 1 May 2017 02:24:16 +0000 (22:24 -0400)
commitd68be71ea14d609a5f31534003319be5db422595
tree275aa6efd067897bd1c2e518ac66849d4b386269
parentd1f496fd8f34a40458d0eda6be0655926559e546
tcp: fix access to sk->sk_state in tcp_poll()

avoid direct access to sk->sk_state when tcp_poll() is called on a socket
using active TCP fastopen with deferred connect. Use local variable
'state', which stores the result of sk_state_load(), like it was done in
commit 00fd38d938db ("tcp: ensure proper barriers in lockless contexts").

Fixes: 19f6d3f3c842 ("net/tcp-fastopen: Add new API support")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Wei Wang <weiwan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp.c