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

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Message-ID: <20170805113747.GE16313@lst.de>
Date:   Sat, 5 Aug 2017 13:37:47 +0200
From:   Christoph Hellwig <hch@....de>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     hare@...e.de, jthumshirn@...e.de, hch@....de, salyzyn@...gle.com,
        gregkh@...uxfoundation.org, Robb Glasser <rglasser@...gle.com>,
        Doug Gilbert <dgilbert@...erlog.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: sg: Prevent potential double frees in sg driver

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.