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

[Josh Boyer]

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 at 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