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Groups > comp.os.linux.development.system > #519

Re: Kernel crash - unable to handle kernel NULL pointer dereference

From Tim Roberts <timr@probo.com>
Newsgroups comp.os.linux.development.system
Subject Re: Kernel crash - unable to handle kernel NULL pointer dereference
Date 2013-07-20 13:17 -0700
Organization Providenza & Boekelheide, Inc.
Message-ID <6vrlu8dco9lj8cqqn7e8r6inv7vs4h16ig@4ax.com> (permalink)
References <91edc811-105f-40c0-a561-bf80babafc96@googlegroups.com>

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sayeedamir72@gmail.com wrote:

>I implemented an echo server(in c++) that mainly forks and execs multiple iperf commands(linux) and I am getting a kernel crash. I'm pretty new to kernel programming and don't really know how to read the kernel crash log and was hoping someone would help me. The echo server crashes so randomly that it is hard to pinpoint where it is crashing. Most of the time it works for about 2 hours(about 20-30 iperf commands) then the kernel freezes and crashes and needs a reboot. I caught the crash once and it seemed to crash in the middle of an iperf command.
>
>Here is the version of linux I am running.
>    Linux 5NetSim08 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:36:48 UTC 2010 i686 GNU/Linux

Are you sure?  The log says:

>[ 1883.089141] Pid: 0, comm: swapper/0 Not tainted 3.5.0-25-generic #39~precise1-Ubuntu    /i945GSEx-QS R2.00 May.24.2010

3.5.0-25 is a hell of a long ways from 2.6.35-22.  Are you running another
kernel as a user-mode process?
-- 
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.

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Kernel crash - unable to handle kernel NULL pointer dereference sayeedamir72@gmail.com - 2013-07-17 05:18 -0700
  Re: Kernel crash - unable to handle kernel NULL pointer dereference Jorgen Grahn <grahn+nntp@snipabacken.se> - 2013-07-17 14:36 +0000
  Re: Kernel crash - unable to handle kernel NULL pointer dereference Tim Roberts <timr@probo.com> - 2013-07-20 13:17 -0700

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