Re: PowerPC kernel linux-2.6.29.6 crashes at mm/slab.c for ipsec application

On Thu, Aug 06, 2009 at 06:46:26PM +0530, srikanth krishnakar wrote:

Hi all,

Here is kernel bug for linux-2.6.29.6 for PowerPC (ppc440) target, while
running ipsec application it is observed that kernel oops'es oftenly as show
below :

root@powerpc:~# ./ipsec
------------[ cut here ]------------
kernel BUG at mm/slab.c:3002!
Oops: Exception in kernel mode, sig: 5 [#1]
PREEMPT LTT NESTING LEVEL : 0

LTT?

Any Clue or any bugs found in mm/slab.c for linux-2.6.29.6 while
running IPSEC applications ?

Do you have CONFIG_PREEMPT set?  The oops output seems to think so.  Also,
seeing the LTT makes me wonder if you have added custom patches to your kernel?

Do you have a simple testcase that could be run to recreate this?  If so,
could you provide it somewhere and perhaps your .config?

josh