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

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Message-ID: <5047AAD9.90106@interlog.com>
Date:	Wed, 05 Sep 2012 15:41:13 -0400
From:	Douglas Gilbert <dgilbert@...erlog.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	Lukas Czerner <lczerner@...hat.com>, linux-scsi@...r.kernel.org,
	JBottomley@...allels.com, tytso@....edu, pbonzini@...hat.com,
	linux-kernel@...r.kernel.org
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@...hat.com> 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@...cle.com>

Acked-by: Douglas Gilbert <dgilbert@...erlog.com>
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