Re: [PATCH] scsi: sg: only check for dxfer_len greater than 256M

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To: Johannes Thumshirn <jthumshirn@xxxxxxx>
Subject: Re: [PATCH] scsi: sg: only check for dxfer_len greater than 256M
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Thu, 27 Jul 2017 08:51:56 -0400
Cc: "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, Jason L Tibbitts III <tibbs@xxxxxxxxxxx>, Doug Gilbert <dgilbert@xxxxxxxxxxxx>, Linux Kernel Mailinglist <linux-kernel@xxxxxxxxxxxxxxx>, Linux SCSI Mailinglist <linux-scsi@xxxxxxxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, stable@xxxxxxxxxxxxxxx
In-reply-to: <20170727071126.4717-1-jthumshirn@suse.de> (Johannes Thumshirn's message of "Thu, 27 Jul 2017 09:11:26 +0200")
Organization: Oracle Corporation
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Johannes,

> Don't make any assumptions on the sg_io_hdr_t::dxfer_direction or the
> sg_io_hdr_t::dxferp in order to determine if it is a valid
> request. The only way we can check for bad requests is by checking if
> the length exceeds 256M.

Applied to 4.13/scsi-fixes. Thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

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  - From: Johannes Thumshirn

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