Eric Dumazet a41e8a88b0 tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state ... Yuchung Cheng and Marek Majkowski independently reported a weird behavior of TCP_USER_TIMEOUT option when used at connect() time. When the TCP_USER_TIMEOUT is reached, tcp_write_timeout() believes the flow should live, and the following condition in tcp_clamp_rto_to_user_timeout() programs one jiffie timers : remaining = icsk->icsk_user_timeout - elapsed; if (remaining <= 0) return 1; /* user timeout has passed; fire ASAP */ This silly situation ends when the max syn rtx count is reached. This patch makes sure we honor both TCP_SYNCNT and TCP_USER_TIMEOUT, avoiding these spurious SYN packets. Fixes: b701a99e43 ("tcp: Add tcp_clamp_rto_to_user_timeout() helper to improve accuracy") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Yuchung Cheng <ycheng@google.com> Reported-by: Marek Majkowski <marek@cloudflare.com> Cc: Jon Maxwell <jmaxwell37@gmail.com> Link: https://marc.info/?l=linux-netdev&m=156940118307949&w=2 Acked-by: Jon Maxwell <jmaxwell37@gmail.com> Tested-by: Marek Majkowski <marek@cloudflare.com> Signed-off-by: Marek Majkowski <marek@cloudflare.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-09-27 20:42:24 +02:00
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bpfilter
netfilter
af_inet.c
ah4.c
arp.c
cipso_ipv4.c
datagram.c
devinet.c
esp4_offload.c
esp4.c
fib_frontend.c
fib_lookup.h
fib_notifier.c
fib_rules.c
fib_semantics.c
fib_trie.c
fou.c
gre_demux.c
gre_offload.c
icmp.c
igmp.c
inet_connection_sock.c
inet_diag.c
inet_fragment.c
inet_hashtables.c
inet_timewait_sock.c
inetpeer.c
ip_forward.c
ip_fragment.c
ip_gre.c
ip_input.c
ip_options.c
ip_output.c	tcp: honor SO_PRIORITY in TIME_WAIT state	2019-09-27 12:05:02 +02:00
ip_sockglue.c
ip_tunnel_core.c
ip_tunnel.c
ip_vti.c
ipcomp.c
ipconfig.c
ipip.c
ipmr_base.c
ipmr.c
Kconfig	net: Fix Kconfig indentation	2019-09-26 08:56:17 +02:00
Makefile
metrics.c
netfilter.c
netlink.c
nexthop.c
ping.c
proc.c
protocol.c
raw_diag.c
raw.c
route.c
syncookies.c
sysctl_net_ipv4.c
tcp_bbr.c	tcp_bbr: fix quantization code to not raise cwnd if not probing bandwidth	2019-09-27 20:37:50 +02:00
tcp_bic.c
tcp_bpf.c
tcp_cdg.c
tcp_cong.c
tcp_cubic.c
tcp_dctcp.c
tcp_dctcp.h
tcp_diag.c
tcp_fastopen.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c
tcp_ipv4.c	tcp: honor SO_PRIORITY in TIME_WAIT state	2019-09-27 12:05:02 +02:00
tcp_lp.c
tcp_metrics.c
tcp_minisocks.c	tcp: honor SO_PRIORITY in TIME_WAIT state	2019-09-27 12:05:02 +02:00
tcp_nv.c
tcp_offload.c
tcp_output.c
tcp_rate.c
tcp_recovery.c
tcp_scalable.c
tcp_timer.c	tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state	2019-09-27 20:42:24 +02:00
tcp_ulp.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c
udp_tunnel.c
udp.c
udplite.c
xfrm4_input.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c