linux-kernel - Re: scsi: sg: assorted memory corruptions

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Message-ID: <1517501859.3417.67.camel@codethink.co.uk>
Date:   Thu, 01 Feb 2018 16:17:39 +0000
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Dmitry Vyukov <dvyukov@...gle.com>,
        Doug Gilbert <dgilbert@...erlog.com>
Cc:     Bart Van Assche <Bart.VanAssche@....com>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "syzkaller@...glegroups.com" <syzkaller@...glegroups.com>
Subject: Re: scsi: sg: assorted memory corruptions

On Thu, 2018-02-01 at 08:04 +0100, Dmitry Vyukov wrote:
> On Thu, Feb 1, 2018 at 7:03 AM, Douglas Gilbert <dgilbert@...erlog.com> wrote:
> > On 2018-01-30 07:22 AM, Dmitry Vyukov wrote:
[...]
> > > [1:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.0.  /dev/sr0   /dev/sg1
> > > 
> > > # readlink /sys/class/scsi_generic/sg0
> > > 
> > > ../../devices/pci0000:00/0000:00:01.1/ata1/host0/target0:0:0/0:0:0:0/scsi_generic/sg0
> > > 
> > > # cat /sys/class/scsi_generic/sg0/device/vendor
> > > ATA
> > 
> > 
> > ^^^^^
> > That subsystem is the culprit IMO, most likely libata.
> > 
> > Until you can show this test failing on something other than an
> > ATA disk, then I will treat this issue as closed.
> 
> Hi Doug,
> 
> Why is bug in ATA not a bug? Is it long unused by everybody? I've got
> it by running qemu with default flags...

If the bug is in libata then it's not on Doug to fix it since he's only
maintaining sg.

Ben.

-- 
Ben Hutchings
Software Developer, Codethink Ltd.