Re: [PATCH 1/1] ATA: piix, fix pointer deref on suspend

[Tejun Heo]

Jiri Slaby wrote:
> Hi,
> 
> I've found this issue in the mmotm 2008-12-02-17-08.
> 
> --
> 
> 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
> 
> Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
> Cc: Jeff Garzik <jgarzik@xxxxxxxxxx>
> Cc: Alexandru Romanescu <a_romanescu@xxxxxxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>

Thanks.

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

-- 
tejun
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