From: Martin Josefsson <gandalf@wlug.westbo.se>
To: Dave Jones <davej@codemonkey.org.uk>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: conntrack related slab corruption in 2.5.65
Date: 24 Mar 2003 23:32:01 +0100 [thread overview]
Message-ID: <1048545120.14720.45.camel@tux.rsn.bth.se> (raw)
In-Reply-To: <20030324220404.GB3034@suse.de>
On Mon, 2003-03-24 at 23:04, Dave Jones wrote:
> Slab corruption: start=cf480a84, expend=cf480bb7, problemat=cf480aec
> Last user: [<c03ed43a>](destroy_conntrack+0xf8/0x159)
> Data: ********************************************************************************************************EC 0A 48 CF EC 0A 48 CF ***************************************************************************************************************************************************************************************************A5
> Next: 71 F0 2C .3A D4 3E C0 71 F0 2C .********************
> slab error in check_poison_obj(): cache `ip_conntrack': object was modified after freeing
Are you using a conntrack helper (ie. ip_conntrack_ftp) ?
If so then this is fixed in -mm. If not then this is another bug that I
need to track down.
I've been trying to get hold of Harald Welte for a few days now, all
netfilter patches should go through him -> davem -> linus/marcelo.
--- linux-2.5.64-bk10/net/ipv4/netfilter/ip_conntrack_core.c.orig 2003-03-21 01:42:57.000000000 +0100
+++ linux-2.5.64-bk10/net/ipv4/netfilter/ip_conntrack_core.c 2003-03-22 00:43:28.000000000 +0100
@@ -274,6 +274,7 @@
* the un-established ones only */
if (exp->sibling) {
DEBUGP("remove_expectations: skipping established %p of %p\n", exp->sibling, ct);
+ exp->expectant = NULL;
continue;
}
@@ -327,9 +328,11 @@
WRITE_LOCK(&ip_conntrack_lock);
/* Delete our master expectation */
if (ct->master) {
- /* can't call __unexpect_related here,
- * since it would screw up expect_list */
- list_del(&ct->master->expected_list);
+ if (ct->master->expectant) {
+ /* can't call __unexpect_related here,
+ * since it would screw up expect_list */
+ list_del(&ct->master->expected_list);
+ }
kfree(ct->master);
}
WRITE_UNLOCK(&ip_conntrack_lock);
--
/Martin
next prev parent reply other threads:[~2003-03-24 22:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-24 22:04 Dave Jones
2003-03-24 22:32 ` Martin Josefsson [this message]
2003-03-25 1:24 ` Dave Jones
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