linux-kernel - Re: [PATCH 1/1] scsi: fnic: fix use after free

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Message-ID: <yq1a79a524b.fsf@oracle.com>
Date:   Tue, 05 Nov 2019 00:22:12 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Pan Bian <bianpan2016@....com>
Cc:     Satish Kharat <satishkh@...co.com>,
        Sesidhar Baddela <sebaddel@...co.com>,
        Karan Tilak Kumar <kartilak@...co.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] scsi: fnic: fix use after free


Pan,

> The memory chunk io_req is released by mempool_free. Accessing
> io_req->start_time will result in a use after free bug. The variable
> start_time is a backup of the timestamp. So, use start_time here to
> avoid use after free.

Applied to 5.5/scsi-queue, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering