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tcp: clear xmit timers in tcp_v4_syn_recv_sock()

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Simon Kirby reported divides by zero errors in __tcp_select_window()

This happens when inet_csk_route_child_sock() returns a NULL pointer :

We free new socket while we eventually armed keepalive timer in
tcp_create_openreq_child()

Fix this by a call to tcp_clear_xmit_timers()

[ This is a followup to commit 918eb39962 (net: add missing
bh_unlock_sock() calls) ]

Reported-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-11-14 10:56:56 +00:00 committed by David S. Miller
parent 46993f02d8
commit 709e8697af
1 changed files with 1 additions and 0 deletions
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net/ipv4/tcp_ipv4.c
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@ -1510,6 +1510,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
return NULL;
put_and_exit:
tcp_clear_xmit_timers(newsk);
bh_unlock_sock(newsk);
sock_put(newsk);
goto exit;