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authorEric Dumazet <edumazet@google.com>2015-04-08 22:34:04 (GMT)
committerDavid S. Miller <davem@davemloft.net>2015-04-09 00:19:42 (GMT)
commitdd929c1b3df94a7236c637fe294f04653d07b0d5 (patch)
treedf21fba4fdc2ae548c09f7b415f5c86c0433e83c /net/ipv4/tcp_minisocks.c
parent82740b9ac2fbd935361c1dc770ec49b692c28e7d (diff)
downloadlinux-dd929c1b3df94a7236c637fe294f04653d07b0d5.tar.xz
tcp: do not rearm rsk_timer on FastOpen requests
FastOpen requests are not like other regular request sockets. They do not yet use rsk_timer : tcp_fastopen_queue_check() simply manually removes one expired request from fastopenq->rskq_rst list. Therefore, tcp_check_req() must not call mod_timer_pending(), otherwise we crash because rsk_timer was not initialized. Fixes: fa76ce7328b ("inet: get rid of central tcp/dccp listener timer") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index d700391..2088fdc 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -628,10 +628,16 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
LINUX_MIB_TCPACKSKIPPEDSYNRECV,
&tcp_rsk(req)->last_oow_ack_time) &&
- !inet_rtx_syn_ack(sk, req))
- mod_timer_pending(&req->rsk_timer, jiffies +
- min(TCP_TIMEOUT_INIT << req->num_timeout,
- TCP_RTO_MAX));
+ !inet_rtx_syn_ack(sk, req)) {
+ unsigned long expires = jiffies;
+
+ expires += min(TCP_TIMEOUT_INIT << req->num_timeout,
+ TCP_RTO_MAX);
+ if (!fastopen)
+ mod_timer_pending(&req->rsk_timer, expires);
+ else
+ req->rsk_timer.expires = expires;
+ }
return NULL;
}