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Date: Thu, 4 Oct 2007 10:10:10 +0300
From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: "Kamalesh Babulal" <kamalesh@linux.vnet.ibm.com>
Subject: Re: [Bug] 2.6.23-rc9 - kernel BUG at mm/slab.c:592!
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       samba-technical@lists.samba.org,
       "Balbir Singh" <balbir@linux.vnet.ibm.com>
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Hi Kamalesh,

On 10/4/07, Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> wrote:
> Kernel bug hit, while running fsstress over the CIFS mounted partition on
> the ppc64 machine
>
> cpu 0x0: Vector: 700 (Program Check) at [c000000106ec75f0]
>
>     pc: c0000000000d69cc: .kmem_cache_free+0xac/0x154
>
>     lr: c0000000000b05f0: .mempool_free_slab+0x1c/0x30
>
>     sp: c000000106ec7870
>
>    msr: 8000000000029032
>
>   current = 0xc000000007cf64c0
>
>   paca    = 0xc0000000007ecf00
>
>     pid   = 8210, comm = fsstress
>
> kernel BUG at mm/slab.c:592!

Looks like someone passed a non-slab pointer to
mempool_free()/kmem_cache_free() so it's likely that the problem is in
cifs, not mm.

                                             Pekka