linux-kernel - Re: [PATCH 2/2 v2] ATA: piix, fix pointer deref on suspend

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Message-ID: <4941793D.1000707@gmail.com>
Date:	Thu, 11 Dec 2008 21:34:05 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	jeff@...zik.org, linux-kernel@...r.kernel.org, jgarzik@...hat.com,
	a_romanescu@...oo.co.uk, tj@...nel.org, alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH 2/2 v2] ATA: piix, fix pointer deref on suspend

Andrew Morton napsal(a):
> On Tue,  9 Dec 2008 21:52:28 +0100
> Jiri Slaby <jirislaby@...il.com> wrote:
> 
>> Commit
>> ata_piix: add borked Tecra M4 to broken suspend list
>> introduced DMI variables checking, but they can be null, so that
>> we possibly dereference null.
>>
>> Check if they are null and avoid checks in that case.
>>
>> Solves:
>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
>> IP: [<ffffffff8043da97>] piix_pci_device_suspend+0x117/0x230
> 
> This already got fixed, the nasty way.
> 
> I queued "DMI: add dmi_match".  We can later switch the piix nastyfix
> over to the nicefix as a cleanup.

Oooops, I didn't Cced you to the last version, sorry for that.
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