Re: [PATCH] scsi: sg: Prevent potential double frees in sg driver

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To: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Subject: Re: [PATCH] scsi: sg: Prevent potential double frees in sg driver
From: Christoph Hellwig <hch@xxxxxx>
Date: Sat, 5 Aug 2017 13:37:47 +0200
Cc: hare@xxxxxxx, jthumshirn@xxxxxxx, hch@xxxxxx, salyzyn@xxxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx, Robb Glasser <rglasser@xxxxxxxxxx>, Doug Gilbert <dgilbert@xxxxxxxxxxxx>, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20170803190248.51537-1-ndesaulniers@google.com>
User-agent: Mutt/1.5.17 (2007-11-01)

This looks correct and safe to me, but I wonder if anyone relies
on multi-threaded /dev/sg write usage, which would be completely
serialized with this.

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References:
- [PATCH] scsi: sg: Prevent potential double frees in sg driver
  - From: Nick Desaulniers

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