netdev - Re: 2.6.35 -> 2.6.36 panic when vlan and promisc with tg3

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Message-ID: <4CF442FA.4070701@candelatech.com>
Date:	Mon, 29 Nov 2010 16:19:06 -0800
From:	Ben Greear <greearb@...delatech.com>
To:	Michael Leun <lkml20101129@...ton.leun.net>
CC:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 2.6.35 -> 2.6.36 panic when vlan and promisc with tg3

On 11/29/2010 11:17 AM, Michael Leun wrote:
> Hi,
>
> only kernel message I was able to capture on serial were:
>
> UG: unable to handle kernel paging request at 01cc921c
> IP: [<c034bfce>] vlan_hwaccel_do_receive+0x59/0xd0
> *pdpt = 0000000036a2a001 *pde = 0000000000000000
> Oops: 0002 [#1] SMP
> last sysfs
>
> Then machine dead.
>
> In 2.6.35.x this did not happen (but vlans broken - cannot see vlan
> tags with tcpdump),

Try this patch:

http://permalink.gmane.org/gmane.linux.network/176566

It looks like this hasn't made it into stable yet?

Thanks,
Ben

>
> To reproduce:
>
> ip link set eth0 up
> vconfig add eth0 2
> ip link set eth0 promisc on
>
> Machines with these ethernet cards I've seen to be affected:
>
> Ethernet controller: Broadcom Corporation NetXtreme BCM5714 Gigabit
> Ethernet (rev a3)
>
> Ethernet controller: Broadcom Corporation NetXtreme BCM5752M Gigabit
> Ethernet PCI Express (rev 02)
>
> Machine with this card is NOT affected (no vlan hw accel?):
>
> Ethernet controller: Broadcom Corporation NetLink BCM5906M Fast
> Ethernet PCI Express (rev 02)
>
>


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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