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

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Message-ID: <CACT4Y+ZEJ9_no0uQSXO66iyyUeJLn_zbPBEey62YkuzOEUMP2w@mail.gmail.com>
Date:   Thu, 1 Feb 2018 17:21:12 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org
Cc:     Doug Gilbert <dgilbert@...erlog.com>,
        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, Feb 1, 2018 at 5:17 PM, Ben Hutchings
<ben.hutchings@...ethink.co.uk> wrote:
> 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.


Then I think we need to CC ata maintainers rather than treat it as closed.
+Tejun, linux-ide@, you can see full thread here:
https://groups.google.com/forum/#!topic/syzkaller/9RNr9Gu0MyY