linux-kernel - Re: [dm-devel] [PATCH v3 01/26] block: Fix a buffer overrun in bio_integrity

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Message-ID: <yq1wqz833sr.fsf@sermon.lab.mkp.net>
Date:	Tue, 02 Oct 2012 18:30:28 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, linux-bcache@...r.kernel.org,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com, axboe@...nel.dk,
	"Martin K. Petersen" <martin.petersen@...cle.com>, tj@...nel.org
Subject: Re: [dm-devel] [PATCH v3 01/26] block: Fix a buffer overrun in bio_integrity_split()

>>>>> "Kent" == Kent Overstreet <koverstreet@...gle.com> writes:

>> > + *bp->bip1.bip_vec = bip->bip_vec[0];
>> > + *bp->bip2.bip_vec = bip->bip_vec[0];
>> 
>> I think this is horrible.

Yep.


>> Why not introduce bvec pointer in bip (like bio), to cover the case
>> when bvec are not inline.

Kent> That's... exactly what the next patch in the series does.

I'm perfectly ok with a patch that introduces the pointer and fixes the
bio_pair case. As long as that's all it does.

-- 
Martin K. Petersen	Oracle Linux Engineering
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