[Linux-kernel-mentees] KMSAN: uninit-value in rt2500usb_probe_hw

Anant Thazhemadam anant.thazhemadam at gmail.com
Wed Sep 30 16:20:57 UTC 2020

On 30/09/20 9:46 pm, Dmitry Vyukov wrote:
> On Wed, Sep 30, 2020 at 5:57 PM Anant Thazhemadam
> <anant.thazhemadam at gmail.com> wrote:
>> On 26/09/20 12:27 pm, Greg KH wrote:
>>> On Sat, Sep 26, 2020 at 08:53:07AM +0200, Dmitry Vyukov via Linux-kernel-mentees wrote:
>>>> On Sat, Sep 26, 2020 at 5:25 AM syzbot
>>>> <syzbot+35c80b2190255a410f66 at syzkaller.appspotmail.com> wrote:
>>>>> Hello,
>>>>> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
>>>>> Reported-and-tested-by: syzbot+35c80b2190255a410f66 at syzkaller.appspotmail.com
>>>>> Tested on:
>>>>> commit:         c5a13b33 kmsan: clang-format core
>>>>> git tree:       https://github.com/google/kmsan.git master
>>>>> kernel config:  https://syzkaller.appspot.com/x/.config?x=41fca8ac7f9e770a
>>>>> dashboard link: https://syzkaller.appspot.com/bug?extid=35c80b2190255a410f66
>>>>> compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
>>>>> Note: testing is done by a robot and is best-effort only.
>>>> Hi Anant,
>>>> I see you are testing lots of USB bugs. USB subsystem is currently
>>>> broken, testing of any USB bugs will give false "no crash" results,
>>>> see:
>>>> https://lore.kernel.org/linux-kernel-mentees/CACT4Y+YmbmrH9gCCnCzP-FYa-dKxx9qhKZ+RQxi1f-+Hoj1SUg@mail.gmail.com/
>>> Fixes for this USB problem are in my tree now and should show up in
>>> linux-next on Monday.
>>> thanks,
>>> greg k-h
>> Is there any chance you could identify the commit that fixes this bug?
>> It would help us close the bug for good. :)
> I think Greg meant the fix for the general USB brokenness, not a fix
> for this syzbot bug. This bug is not fixed to the best of syzbot
> knowledge.

Ah, okay. My bad. I was wondering why the bug wasn't closed already
if there was already a fix. Thank you for clearing that up :)


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