Eric Dumazet cfac7f836a tcp/dccp: block bh before arming time_wait timer ... Maciej Żenczykowski reported some panics in tcp_twsk_destructor() that might be caused by the following bug. timewait timer is pinned to the cpu, because we want to transition timwewait refcount from 0 to 4 in one go, once everything has been initialized. At the time commit ed2e923945 ("tcp/dccp: fix timewait races in timer handling") was merged, TCP was always running from BH habdler. After commit 5413d1babe ("net: do not block BH while processing socket backlog") we definitely can run tcp_time_wait() from process context. We need to block BH in the critical section so that the pinned timer has still its purpose. This bug is more likely to happen under stress and when very small RTO are used in datacenter flows. Fixes: 5413d1babe ("net: do not block BH while processing socket backlog") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Maciej Żenczykowski <maze@google.com> Acked-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-12-01 15:07:43 -05:00
..
ccids	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ackvec.c
ackvec.h
ccid.c
ccid.h
dccp.h	net: snmp: kill STATS_BH macros	2016-04-27 22:48:25 -04:00
diag.c
feat.c	dccp: fix a memleak for dccp_feat_init err process	2017-07-27 00:01:05 -07:00
feat.h
input.c	net: dccp: mark expected switch fall-throughs	2017-10-16 21:15:21 +01:00
ipv4.c	tcp/dccp: fix other lockdep splats accessing ireq_opt	2017-10-26 17:41:32 +09:00
ipv6.c	net: dccp: Add handling of IPV6_PKTOPTIONS to dccp_v6_do_rcv()	2017-08-31 11:43:47 -07:00
ipv6.h
Kconfig
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
minisocks.c	tcp/dccp: block bh before arming time_wait timer	2017-12-01 15:07:43 -05:00
options.c	net: dccp: mark expected switch fall-throughs	2017-10-16 21:15:21 +01:00
output.c	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
probe.c
proto.c	dccp: defer ccid_hc_tx_delete() at dismantle time	2017-08-16 14:26:26 -07:00
qpolicy.c
sysctl.c
timer.c	net: dccp: Convert timers to use timer_setup()	2017-10-25 12:59:19 +09:00