netdev - Re: [Bugme-new] [Bug 33842] New: NULL pointer dereference in ip

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Date:	Wed, 27 Apr 2011 09:41:07 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tomas Carnecky <tom@...ervice.com>
Cc:	Bandan Das <bandan.das@...atus.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [Bugme-new] [Bug 33842] New: NULL pointer dereference in
 ip_fragment

Le mercredi 27 avril 2011 à 09:22 +0200, Tomas Carnecky a écrit :
> On 4/26/11 11:24 PM, Eric Dumazet wrote:
> > Le mardi 26 avril 2011 à 17:19 -0400, Bandan Das a écrit :
> >> Yeah, I just rechecked and this is already in Linus' tree. So, Tomas you can
> >> either try pulling in those changes or you can apply this patch and see
> >> if it makes any difference. Thanks!
> > Better pull Linus tree because there is another patch involved.
> >
> > (commits c65353daf137dd41f3ede3baf62d561fca076228
> > ip: ip_options_compile() resilient to NULL skb route
> 
> Still getting that error (on rc4-00245-g4175242, which includes that 
> commit).
> 

Could you send us a complete trace ?

One way to get one is to use netconsole (provided you have another
machine )

grep NETCONSOLE .config
CONFIG_NETCONSOLE=y

Add on your boot command

netconsole=4444@....168.20.108/eth0,4444@....168.20.112/00:1e:0b:ec:c3:e4

messages sent to host 192.168.20.112 udp port 4444, mac addr 00:1e:0b:ec:c3:e4, on eth0

then on 192.168.20.112 start a netcat listening on udp port 4444 to get
a copy of messages.

netcat -l -u -p 4444

Complete doc on Documentation/networking/netconsole.txt

Thanks !


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