Re: BUG: unable to handle kernel paging request at 00010016

From: Dave Haywood
Date: Mon Aug 20 2012 - 20:05:29 EST


On 19/08/2012 09:21, Artem Savkov wrote:
On Sat, Aug 18, 2012 at 11:25:43PM -0500, Shaun Ruffell wrote:
Adding linux-net to the CC list.

On Fri, Aug 17, 2012 at 11:57:56PM +0100, Dave Haywood wrote:
[1.] One line summary of the problem:
BUG: unable to handle kernel paging request at 00010016

System boots then crashes a 5-10 or so seconds after getting to the login prompt
Booting without the network cable attached prevents the crash (no evidence beyond 10 minutes after boot)

Diagnostics:
Captured the boot and managed a login + dmesg before the crash
Some of the log looks corrupted. Probably my crappy usb dongle serial flow control but left it in anyway
[snip]

Just a note that I see this as well. It happens reliably for me after trying to
login to the machine via ssh.

Here is the back trace I collected on the serial port.
There is a patch posted on netdev that fixes this for me:
http://patchwork.ozlabs.org/patch/178525/

Bisected to:

5d299f3d3c8a2fbc732b1bf03af36333ccec3130 is the first bad commit

commit 5d299f3d3c8a2fbc732b1bf03af36333ccec3130

Author: Eric Dumazet <edumazet@xxxxxxxxxx>

Date: Mon Aug 6 05:09:33 2012 +0000

net: ipv6: fix TCP early demux

IPv6 needs a cookie in dst_check() call.

We need to add rx_dst_cookie and provide a family independent

sk_rx_dst_set(sk, skb) method to properly support IPv6 TCP early demux.

Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>

:040000 040000 96ade77f304a89c1886fbaa125b03d1f5699e418 485a021044b8f52ae8562e4e90d8f6536863f5e7 M include

:040000 040000 1ebd6792af2014ad11979216b9a56504a28d5782 7a53fc9e7fb219c4cacb1bbb3b6867f30790dfd1 M net




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