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Eric Dumazet 5ea8ea2cb7 tcp/dccp: drop SYN packets if accept queue is full 
Per listen(fd, backlog) rules, there is really no point accepting a SYN,
sending a SYNACK, and dropping the following ACK packet if accept queue
is full, because application is not draining accept queue fast enough.

This behavior is fooling TCP clients that believe they established a
flow, while there is nothing at server side. They might then send about
10 MSS (if using IW10) that will be dropped anyway while server is under
stress.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-10-29 15:09:21 -04:00
..
6lowpan 6lowpan: ndisc: no overreact if no short address is available 2016-09-19 20:19:34 +02:00
9p IB/core: add support to create a unsafe global rkey to ib_create_pd 2016-09-23 13:47:44 -04:00
802 net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
8021q net: use core MTU range checking in core net infra 2016-10-20 14:51:09 -04:00
appletalk appletalk: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:10 -07:00
atm net: remove MTU limits on a few ether_setup callers 2016-10-21 13:57:50 -04:00
ax25 AX.25: Close socket connection on session completion 2016-06-18 20:55:34 -07:00
batman-adv genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
bluetooth net: remove MTU limits on a few ether_setup callers 2016-10-21 13:57:50 -04:00
bridge net: use core MTU range checking in core net infra 2016-10-20 14:51:09 -04:00
caif net caif: insert missing spaces in pr_* messages and unbreak multi-line strings 2016-10-28 13:47:33 -04:00
can can: only call can_stat_update with procfs 2016-06-23 11:23:49 +02:00
ceph crush: remove redundant local variable 2016-10-05 23:02:10 +02:00
core net: skip genenerating uevents for network namespaces that are exiting 2016-10-27 17:14:47 -04:00
dcb
…
dccp tcp/dccp: drop SYN packets if accept queue is full 2016-10-29 15:09:21 -04:00
decnet net: fix decnet rtnexthop parsing 2016-07-05 14:08:47 -07:00
dns_resolver KEYS: Add a facility to restrict new links into a keyring 2016-04-11 22:37:37 +01:00
dsa net: remove MTU limits on a few ether_setup callers 2016-10-21 13:57:50 -04:00
ethernet net: deprecate eth_change_mtu, remove usage 2016-10-13 09:36:57 -04:00
hsr genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
ieee802154 genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
ipv4 tcp/dccp: drop SYN packets if accept queue is full 2016-10-29 15:09:21 -04:00
ipv6 genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
ipx
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irda genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
iucv Subject: [PATCH] af_iucv: drop skbs rejected by filter 2016-10-12 01:56:04 -04:00
kcm Merge branch 'work.splice_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-07 15:36:58 -07:00
key
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l2tp genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
l3mdev net: ipv6: Remove l3mdev_get_saddr6 2016-09-10 23:12:53 -07:00
lapb net/lapb: tuse %*ph to dump buffers 2016-05-29 22:33:25 -07:00
llc llc: switch type to bool as the timeout is only tested versus 0 2016-09-17 10:05:05 -04:00
mac80211 net: use core MTU range checking in wireless drivers 2016-10-20 14:51:08 -04:00
mac802154 mac802154: use rate limited warnings for malformed frames 2016-09-19 20:19:34 +02:00
mpls lwt: Remove unused len field 2016-10-23 17:45:01 -04:00
ncsi net/ncsi: Introduce ncsi_stop_dev() 2016-10-04 02:11:51 -04:00
netfilter genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
netlabel genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
netlink genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
netrom
…
nfc genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
openvswitch genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
packet packet: call fanout_release, while UNREGISTERING a netdev 2016-10-06 20:50:18 -04:00
phonet net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
qrtr Merge tag 'qcom-soc-for-4.7-2' into net-next 2016-05-17 14:11:19 -04:00
rds rds: Remove duplicate prefix from rds_conn_path_error use 2016-10-17 11:07:22 -04:00
rfkill rfkill: Use switch to demux userspace operations 2016-04-05 10:48:53 +02:00
rose rose: limit sk_filter trim to payload 2016-07-13 11:53:40 -07:00
rxrpc rxrpc: Don't request an ACK on the last DATA packet of a call's Tx phase 2016-10-06 08:11:51 +01:00
sched netlink: Add nla_memdup() to wrap kmemdup() use on nlattr 2016-10-29 14:57:42 -04:00
sctp sctp: remove the old ttl expires policy 2016-10-13 09:44:14 -04:00
strparser strparser: Propagate correct error code in strp_recv() 2016-10-12 01:51:49 -04:00
sunrpc udp: use it's own memory accounting schema 2016-10-22 17:05:05 -04:00
switchdev switchdev: Remove redundant variable 2016-10-29 14:58:33 -04:00
tipc genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
unix skb_splice_bits(): get rid of callback 2016-10-03 20:40:56 -04:00
vmw_vsock VSOCK: Don't dec ack backlog twice for rejected connections 2016-09-27 07:59:25 -04:00
wimax genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
wireless netlink: Add nla_memdup() to wrap kmemdup() use on nlattr 2016-10-29 14:57:42 -04:00
x25 net: x25: remove null checks on arrays calling_ae and called_ae 2016-09-09 18:13:30 -07:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2016-10-28 13:26:27 -04:00
Kconfig strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
Makefile strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
compat.c packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
socket.c vfs: Remove {get,set,remove}xattr inode operations 2016-10-07 21:48:36 -04:00
sysctl_net.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2016-10-06 09:52:23 -07:00