linux-kernel - Re: [PATCH] block: Fix bad range check in bio_sector

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Message-ID: <yq1fw75pt5q.fsf@sermon.lab.mkp.net>
Date:	Wed, 29 Aug 2012 12:19:45 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH] block: Fix bad range check in bio_sector_offset

>>>>> "Jeff" == Jeff Moyer <jmoyer@...hat.com> writes:

>> DM would occasionally end up splitting data integrity-enabled
>> requests incorrectly. The culprit was a bad range check in
>> bio_sector_offset.

Jeff> The patch looks ok to me, but what is the user visible behavior
Jeff> when this happens?

We'd occasionally end up mapping a bad integrity scatterlist and the HBA
would abort the I/O with a protection information error.

-- 
Martin K. Petersen	Oracle Linux Engineering
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