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tcp: fix possible socket refcount problem for ipv6 

commit 144d56e910
("tcp: fix possible socket refcount problem") is missing
the IPv6 part. As tcp_release_cb is shared by both protocols
we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED
bit.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2012-09-05 10:53:18 +00:00 committed by David S. Miller
parent 463dde19a7
commit d013ef2aba
1 changed files with 3 additions and 2 deletions
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5
net/ipv6/tcp_ipv6.c
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@ -403,8 +403,9 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
tp->mtu_info = ntohl(info);
if (!sock_owned_by_user(sk))
tcp_v6_mtu_reduced(sk);
else
set_bit(TCP_MTU_REDUCED_DEFERRED, &tp->tsq_flags);
else if (!test_and_set_bit(TCP_MTU_REDUCED_DEFERRED,
&tp->tsq_flags))
sock_hold(sk);
goto out;
}