Re: [PATCH] scsi_debug: Fix off-by-one bug when unmapping region

[Lukáš Czerner]

On Wed, 5 Sep 2012, Douglas Gilbert wrote:

> Date: Wed, 05 Sep 2012 15:41:13 -0400
> From: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
> To: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> Cc: Lukas Czerner <lczerner@xxxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx,
>     JBottomley@xxxxxxxxxxxxx, tytso@xxxxxxx, pbonzini@xxxxxxxxxx,
>     linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] scsi_debug: Fix off-by-one bug when unmapping region
> 
> On 12-08-17 12:11 PM, Martin K. Petersen wrote:
> > > > > > > "Lukas" == Lukas Czerner <lczerner@xxxxxxxxxx> writes:
> > 
> > Lukas> Currently it is possible to unmap one more block than user
> > Lukas> requested to due to the off-by-one error in unmap_region(). This
> > Lukas> is probably due to the fact that the end variable despite its
> > Lukas> name actually points to the last block to unmap + 1. However in
> > Lukas> the condition it is handled as the last block of the region to
> > Lukas> unmap.
> > 
> > Acked-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> 
> Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>

James, could you please pick this one ?

Thanks!
-Lukas
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