Neal Cardwell b344579ca8 tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT ... Mirja Kuehlewind reported a bug in Linux TCP CUBIC Hystart, where Hystart HYSTART_DELAY mechanism can exit Slow Start spuriously on an ACK when the minimum rtt of a connection goes down. From inspection it is clear from the existing code that this could happen in an example like the following: o The first 8 RTT samples in a round trip are 150ms, resulting in a curr_rtt of 150ms and a delay_min of 150ms. o The 9th RTT sample is 100ms. The curr_rtt does not change after the first 8 samples, so curr_rtt remains 150ms. But delay_min can be lowered at any time, so delay_min falls to 100ms. The code executes the HYSTART_DELAY comparison between curr_rtt of 150ms and delay_min of 100ms, and the curr_rtt is declared far enough above delay_min to force a (spurious) exit of Slow start. The fix here is simple: allow every RTT sample in a round trip to lower the curr_rtt. Fixes: ae27e98a51 ("[TCP] CUBIC v2.3") Reported-by: Mirja Kuehlewind <mirja.kuehlewind@ericsson.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2020-06-25 16:08:47 -07:00
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bpfilter
netfilter	netfilter: iptables: Add a .pre_exit hook in all iptable_foo.c.	2020-06-25 00:50:31 +02:00
af_inet.c
ah4.c
arp.c
bpf_tcp_ca.c
cipso_ipv4.c
datagram.c
devinet.c
esp4.c
esp4_offload.c	net: Add MODULE_DESCRIPTION entries to network modules	2020-06-20 21:33:57 -07:00
fib_frontend.c
fib_lookup.h
fib_notifier.c
fib_rules.c
fib_semantics.c	net: Fix the arp error in some cases	2020-06-18 20:21:51 -07:00
fib_trie.c
fou.c	net: Add MODULE_DESCRIPTION entries to network modules	2020-06-20 21:33:57 -07:00
gre_demux.c
gre_offload.c
icmp.c
igmp.c
inet_connection_sock.c	inet_connection_sock: clear inet_num out of destroy helper	2020-06-04 15:59:56 -07:00
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
ip_sockglue.c
ip_tunnel.c	ip_tunnel: fix use-after-free in ip_tunnel_lookup()	2020-06-18 20:12:34 -07:00
ip_tunnel_core.c
ip_vti.c
ipcomp.c
ipconfig.c
ipip.c
ipmr.c
ipmr_base.c
Kconfig	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec	2020-06-19 13:03:47 -07:00
Makefile
metrics.c
netfilter.c
netlink.c
nexthop.c	nexthop: Fix fdb labeling for groups	2020-06-10 13:18:40 -07:00
ping.c
proc.c
protocol.c
raw.c
raw_diag.c
route.c
syncookies.c
sysctl_net_ipv4.c
tcp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-13 16:27:13 -07:00
tcp_bbr.c
tcp_bic.c
tcp_bpf.c	bpf: tcp: Recv() should return 0 when the peer socket is closed	2020-06-12 15:10:12 -07:00
tcp_cdg.c
tcp_cong.c
tcp_cubic.c	tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT	2020-06-25 16:08:47 -07:00
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: don't ignore ECN CWR on pure ACK	2020-06-25 12:20:24 -07:00
tcp_ipv4.c
tcp_lp.c
tcp_metrics.c
tcp_minisocks.c
tcp_nv.c
tcp_offload.c
tcp_output.c
tcp_rate.c
tcp_recovery.c
tcp_scalable.c
tcp_timer.c
tcp_ulp.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tunnel4.c
udp.c
udp_bpf.c
udp_diag.c
udp_impl.h
udp_offload.c
udp_tunnel.c	net: Make locking in sock_bindtoindex optional	2020-06-01 14:57:14 -07:00
udplite.c
xfrm4_input.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c