Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten | KernelTrap

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten

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From: Evgeniy Polyakov <johnpol@...>

To: Ingo Molnar <mingo@...>

Cc: <linux-kernel@...>, <netdev@...>, Pekka Enberg <penberg@...>, Vegard Nossum <vegard.nossum@...>, Rafael J. Wysocki <rjw@...>

Subject: Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten

Date: Friday, July 18, 2008 - 1:46 am

Hi Ingo.

On Thu, Jul 17, 2008 at 11:42:22PM +0200, Ingo Molnar (mingo@elte.hu) wrote:
quoted text> Pid: 5098, comm: gdm-binary Not tainted 2.6.26-tip #3094
>  [<c0186f99>] print_trailer+0xa9/0xf0
>  [<c018707b>] check_bytes_and_report+0x9b/0xc0
>  [<c01874ae>] check_object+0x19e/0x1e0
>  [<c0187ef1>] __slab_alloc+0x371/0x4e0
>  [<c0188552>] kmem_cache_alloc+0xb2/0xc0
>  [<c06732dc>] ? __alloc_skb+0x2c/0x110

Out of curiosity, why does it scream at allocation time?
Does SLUB have a debug check at freeing time? If so, how does it work
and why didn't it caught use after free there?

-- 
	Evgeniy Polyakov
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Messages in current thread:

[bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwr..., Ingo Molnar, (Thu Jul 17, 5:42 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka J Enberg, (Fri Jul 18, 5:00 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Christoph Lameter, (Fri Jul 18, 9:55 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Fri Jul 18, 5:11 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 5:41 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka Enberg, (Mon Jul 21, 5:52 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Mon Jul 21, 6:06 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Christoph Lameter, (Mon Jul 21, 12:22 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Mon Jul 21, 3:57 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 4:05 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Mon Jul 21, 4:22 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 6:50 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Mon Jul 21, 7:25 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 7:55 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 3:21 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Mon Jul 21, 5:24 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Mon Jul 21, 7:33 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Tue Jul 22, 3:50 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Tue Jul 22, 9:34 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Wed Jul 23, 6:31 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Jeff Kirsher, (Wed Jul 23, 6:40 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Mon Jul 21, 8:57 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 10:01 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Mon Jul 21, 7:03 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Christoph Lameter, (Mon Jul 21, 12:19 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Mon Jul 21, 4:23 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Mon Jul 21, 7:13 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka Enberg, (Fri Jul 18, 5:16 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Christoph Lameter, (Fri Jul 18, 9:54 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Fri Jul 18, 1:46 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka Enberg, (Fri Jul 18, 5:02 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Fri Jul 18, 6:16 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka Enberg, (Fri Jul 18, 10:44 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Evgeniy Polyakov, (Fri Jul 18, 12:07 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Christoph Lameter, (Fri Jul 18, 10:48 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Fri Jul 18, 5:09 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Pekka Enberg, (Fri Jul 18, 5:15 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Thu Jul 17, 7:27 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 7:56 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Mon Jul 21, 7:41 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Thu Jul 17, 7:15 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Thu Jul 17, 10:03 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Fri Jul 18, 3:03 am)

Re: [bug] Attempt to release alive inet socket f6fac040, Ingo Molnar, (Fri Jul 18, 3:10 pm)

Re: [bug] Attempt to release alive inet socket f6fac040, Ingo Molnar, (Fri Jul 18, 3:55 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Fri Jul 18, 5:05 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Fri Jul 18, 3:12 am)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 7:52 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Thu Jul 17, 10:13 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Thu Jul 17, 8:05 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 8:16 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 8:01 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Vegard Nossum, (Thu Jul 17, 7:35 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Thu Jul 17, 5:45 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 6:06 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., Ingo Molnar, (Thu Jul 17, 6:43 pm)

Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison ov..., David Miller, (Thu Jul 17, 6:09 pm)

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