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authorJulian Anastasov <ja@ssi.bg>2012-09-05 10:53:18 +0000
committerDavid S. Miller <davem@davemloft.net>2012-09-05 17:16:25 -0400
commitd013ef2aba8fe765ca683598e404203215632373 (patch)
tree7b2dec8e9df0cc92a41e6ac80ed9812486923acb /net
parent463dde19a759949c96d1c9da9efbb3a9b3a9eb61 (diff)
downloadlinux-d013ef2aba8fe765ca683598e404203215632373.tar.bz2
tcp: fix possible socket refcount problem for ipv6
commit 144d56e91044181ec0ef67aeca91e9a8b5718348 ("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>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/tcp_ipv6.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index a3e60cc04a8a..acd32e3f1b68 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -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;
}