From: Chris Wright <chrisw@osdl.org>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: ralf@linux-mips.org, torvalds@osdl.org, akpm@osdl.org,
alan@lxorguk.ukuu.org.uk, jmforbes@linuxtx.org,
zwane@arm.linux.org.uk, cliffw@osdl.org, tytso@mit.edu,
rddunlap@osdl.org
Subject: [7/9] Timercode race in AX.25
Date: Wed, 16 Mar 2005 15:55:33 -0800 [thread overview]
Message-ID: <20050316235533.GF5389@shell0.pdx.osdl.net> (raw)
In-Reply-To: <20050316235336.GY5389@shell0.pdx.osdl.net>
-stable review patch. If anyone has any objections, please let us know.
----
From: Ralf Baechle DL5RB <ralf@linux-mips.org>
When destroying a socket ax25_destroy_socket tries to stop the protocol's
T1 timer before freeing the memory. If things are just right using the
non-sync variant of del_timer means the timer will continue to run even
after the del_timer because it's adding itself again which is likely to
result in a crash when the timer is executed again a few seconds later.
del_timer_sync can be expensive, so I don't want this one to go into 2.6
mainline where I'll try to cook something that is less intrusive than
regular calls to del_timer_sync.
Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- bk-afu.orig/net/ax25/ax25_timer.c 2005-03-08 13:54:06.000000000 +0000
+++ bk-afu/net/ax25/ax25_timer.c 2005-03-08 16:43:34.790532976 +0000
@@ -106,7 +106,7 @@
void ax25_stop_t1timer(ax25_cb *ax25)
{
- del_timer(&ax25->t1timer);
+ del_timer_sync(&ax25->t1timer);
}
void ax25_stop_t2timer(ax25_cb *ax25)
next prev parent reply other threads:[~2005-03-16 23:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-16 23:53 [0/9] -stable review Chris Wright
2005-03-16 23:54 ` [1/9] [ALSA] Fix stereo mutes on Surround volume control Chris Wright
2005-03-16 23:54 ` [2/9] Possible AMD8111e free irq issue Chris Wright
2005-03-17 0:19 ` Ian Pilcher
2005-03-17 1:03 ` Chris Wright
2005-03-17 1:13 ` Ian Pilcher
2005-03-17 2:00 ` Jeff Garzik
2005-03-16 23:54 ` [3/9] [IPSEC]: Fix __xfrm_find_acq_byseq() Chris Wright
2005-03-16 23:54 ` [4/9] NetROM locking Chris Wright
2005-03-16 23:55 ` [5/9] [TUN] Fix check for underflow Chris Wright
2005-03-17 0:13 ` Patrick McHardy
2005-03-17 0:23 ` Chris Wright
2005-03-16 23:55 ` [6/9] tasklist left locked Chris Wright
2005-03-16 23:55 ` Chris Wright [this message]
2005-03-16 23:55 ` [8/9] Possible VIA-Rhine free irq issue Chris Wright
2005-03-16 23:55 ` [9/9] Fix kernel panic on receive with WAN Hitachi SCA HD6457x Chris Wright
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