From: Jarek Poplawski <jarkao2@o2.pl>
To: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
netdev@vger.kernel.org,
"bugme-daemon\@kernel-bugs\.osdl\.org"
<bugme-daemon@bugzilla.kernel.org>,
pterjan@gmail.com
Subject: Re: [Bugme-new] [Bug 7962] New: oops in port_carrier_check
Date: Fri, 9 Feb 2007 08:42:11 +0100 [thread overview]
Message-ID: <20070209074211.GA1631@ff.dom.local> (raw)
In-Reply-To: <20070207140916.088b1073@oldman>
On 07-02-2007 23:09, Stephen Hemminger wrote:
> On Wed, 7 Feb 2007 12:52:16 -0800
> Andrew Morton <akpm@linux-foundation.org> wrote:
...
>> Feb 7 21:20:18 plop kernel: BUG: unable to handle kernel paging request at
>> virtual address 6b6b6b6b
>> Feb 7 21:20:18 plop kernel: printing eip:
>> Feb 7 21:20:18 plop kernel: *pde = 00000000
>> Feb 7 21:20:18 plop kernel: Oops: 0000 [#1]
>> Feb 7 21:20:18 plop kernel: CPU: 0
>> Feb 7 21:20:19 plop kernel: EIP: 0060:[pg0+814360305/1067136000] Not
>> tainted VLI
>> Feb 7 21:20:19 plop kernel: EIP: 0060:[<f0eed6f1>] Not tainted VLI
>> Feb 7 21:20:19 plop kernel: EFLAGS: 00010202 (2.6.20.0.rc7-1mdv #1)
>> Feb 7 21:20:19 plop kernel: EIP is at port_carrier_check+0x22/0x75 [bridge]
>> Feb 7 21:20:19 plop kernel: eax: 6b6b6b6b ebx: 6b6b6b6b ecx: 00000000
I think it's caused by pending delayed workqueue
trying to use dev after kfree (POISON_FREE in eax, ebx).
> static void port_carrier_check(struct work_struct *work)
> {
> struct net_bridge_port *p;
> struct net_device *dev;
> struct net_bridge *br;
>
> dev = container_of(work, struct net_bridge_port,
> carrier_check.work)->dev;
> work_release(work);
>
> rtnl_lock();
> p = dev->br_port;
> if (!p)
> goto done;
> br = p->br;
>
> if (netif_carrier_ok(dev))
> p->path_cost = port_cost(dev);
>
> if (br->dev->flags & IFF_UP) {
My investigation seems to point at this line (p == ebx
but not NULL because of mem debugging on, probably).
Regards,
Jarek P.
next prev parent reply other threads:[~2007-02-09 7:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-07 20:52 Fw: [Bugme-new] [Bug 7962] New: oops in port_carrier_check Andrew Morton
2007-02-07 22:09 ` Stephen Hemminger
2007-02-09 7:42 ` Jarek Poplawski [this message]
2007-02-09 17:52 ` Stephen Hemminger
2007-02-09 18:50 ` Pascal Terjan
2007-02-12 6:44 ` Jarek Poplawski
2007-02-12 10:28 ` [PATCH][NET][BRIDGE] br_if: " Jarek Poplawski
2007-02-12 17:47 ` Stephen Hemminger
2007-02-13 6:26 ` Jarek Poplawski
2007-02-13 19:55 ` Stephen Hemminger
2007-02-13 20:35 ` David Miller
2007-02-14 8:07 ` Jarek Poplawski
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