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598856407d
linux/net
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Damian Lukowski 598856407d tcp: fix ICMP-RTO war 
Make sure, that TCP has a nonzero RTT estimation after three-way
handshake. Currently, a listening TCP has a value of 0 for srtt,
rttvar and rto right after the three-way handshake is completed
with TCP timestamps disabled.
This will lead to corrupt RTO recalculation and retransmission
flood when RTO is recalculated on backoff reversion as introduced
in "Revert RTO on ICMP destination unreachable"
(f1ecd5d9e7).
This behaviour can be provoked by connecting to a server which
"responds first" (like SMTP) and rejecting every packet after
the handshake with dest-unreachable, which will lead to softirq
load on the server (up to 30% per socket in some tests).

Thanks to Ilpo Jarvinen for providing debug patches and to
Denys Fedoryshchenko for reporting and testing.

Changes since v3: Removed bad characters in patchfile.

Reported-by: Denys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: Damian Lukowski <damian@tvk.rwth-aachen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-10 18:04:08 -08:00
..
9p 9p connect fixes 2009-12-16 12:16:41 -05:00
802 sysctl net: Remove unused binary sysctl code 2009-11-12 02:05:06 -08:00
8021q vlan: fix vlan_skb_recv() 2010-01-24 19:52:24 -08:00
appletalk appletalk:: da.s_net not copied but assigned to itself in aarp_rcv() 2010-01-15 01:49:28 -08:00
atm atm: [br2684] allow routed mode operation again 2009-12-08 20:22:31 -08:00
ax25 ax25: netrom: rose: Fix timer oopses 2010-01-16 01:04:04 -08:00
bluetooth Bluetooth: Keep a copy of each HID device's report descriptor 2010-02-05 09:50:05 -08:00
bridge netfilter: ebtables: enforce CAP_NET_ADMIN 2010-01-08 17:31:24 +01:00
can net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
core dst: call cond_resched() in dst_gc_task() 2010-02-08 15:00:39 -08:00
dcb net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
dccp dccp: fix auto-loading of dccp(_probe) 2010-02-03 19:00:31 -08:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
dsa netdev: convert pseudo-devices to netdev_tx_t 2009-09-01 01:13:07 -07:00
econet net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ethernet remove deprecated and not used: print_mac() 2009-11-15 22:21:34 -08:00
ieee802154 net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ipv4 tcp: fix ICMP-RTO war 2010-02-10 18:04:08 -08:00
ipv6 netfilter: xtables: compat out of scope fix 2010-02-08 11:17:43 -08:00
ipx Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
irda irda: add missing BKL in irnet_ppp ioctl 2010-02-03 20:14:23 -08:00
iucv const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
key af_key: fix netns ops ordering on module load/unload 2010-02-03 18:11:11 -08:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2010-02-10 12:35:24 -08:00
netfilter netfilter: nf_conntrack: fix hash resizing with namespaces 2010-02-08 11:18:07 -08:00
netlabel Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
netlink netlink: fix for too early rmmod 2010-02-03 18:13:43 -08:00
netrom ax25: netrom: rose: Fix timer oopses 2010-01-16 01:04:04 -08:00
packet af_packet: Don't use skb after dev_queue_xmit() 2010-01-11 15:39:42 -08:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
rds Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2009-12-16 10:32:31 -08:00
rfkill net/rfkill/core.c: work around gcc-4.0.2 silliness 2009-12-07 16:51:23 -05:00
rose ax25: netrom: rose: Fix timer oopses 2010-01-16 01:04:04 -08:00
rxrpc net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
sched net/sched: Fix module name in Kconfig 2010-02-08 22:41:44 -08:00
sctp net/sctp/socket.c: squish warning 2010-01-03 21:25:53 -08:00
sunrpc Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 2010-01-08 13:55:14 -08:00
tipc net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
wireless cfg80211: fix channel setting for wext 2010-01-14 17:14:58 -05:00
x25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
xfrm netns xfrm: deal with dst entries in netns 2010-01-24 22:47:53 -08:00
compat.c net: use compat helper functions in compat_sys_recvmmsg 2009-12-11 15:07:57 -08:00
Kconfig net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
Makefile net: remove redundant sched/ in net/Makefile 2009-07-12 20:11:14 -07:00
nonet.c
socket.c fs: no games with DCACHE_UNHASHED 2009-12-17 10:51:40 -05:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
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