linux-kernel - Re: [PATCH v2] scsi: sg: don't return bogus Sg

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Date:   Thu, 11 May 2017 23:15:34 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Johannes Thumshirn <jthumshirn@...e.de>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        James Bottomley <jejb@...ux.vnet.ibm.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Linux SCSI Mailinglist <linux-scsi@...r.kernel.org>,
        Hannes Reinecke <hare@...e.de>, Christoph Hellwig <hch@....de>,
        Doug Gilbert <dgilbert@...erlog.com>
Subject: Re: [PATCH v2] scsi: sg: don't return bogus Sg_requests


Johannes,

> If the list search in sg_get_rq_mark() fails to find a valid request,
> we return a bogus element. This then can later lead to a GPF in
> sg_remove_scat().
>
> So don't return bogus Sg_requests in sg_get_rq_mark() but NULL in case
> the list search doesn't find a valid request.

Applied to 4.12/scsi-fixes, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering