linux-kernel - Re: kmalloc zero size changes break i386

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Message-ID: <Pine.LNX.4.64.0707201009580.1209@sbz-30.cs.Helsinki.FI>
Date:	Fri, 20 Jul 2007 10:12:48 +0300 (EEST)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	Roland Dreier <rdreier@...co.com>
cc:	Andi Kleen <ak@...e.de>, Christoph Lameter <clameter@....com>,
	torvalds@...l.org, linux-kernel@...r.kernel.org,
	"Michael S. Tsirkin" <mst@....mellanox.co.il>
Subject: Re: kmalloc zero size changes break i386

Hi Roland,

On Thu, 19 Jul 2007, Roland Dreier wrote:
> [ 1350.668590] Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
> [ 1350.674068]  [<ffffffff8027b373>] __kmalloc+0x51/0xaf

There's some heavy-duty function inlining going on in__kmalloc so could 
you please work out the exact location of the oops as described in 
Documentation/BUG-HUNTING (look for the "use GDB to translate" part).

And to double-check, this is SLAB with CONFIG_DEBUG_SLAB enabled? Do you 
see this with SLUB?

				Pekka
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