linux-kernel - Re: [Linux-kernel-mentees] KMSAN: uninit-value in rt2500usb_probe

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Date:   Sat, 26 Sep 2020 08:57:04 +0200
From:   Greg KH <greg@...ah.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Anant Thazhemadam <anant.thazhemadam@...il.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Alexander Potapenko <glider@...gle.com>,
        syzbot <syzbot+35c80b2190255a410f66@...kaller.appspotmail.com>,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [Linux-kernel-mentees] KMSAN: uninit-value in rt2500usb_probe_hw

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@...kaller.appspotmail.com> wrote:
> >
> > Hello,
> >
> > syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> >
> > Reported-and-tested-by: syzbot+35c80b2190255a410f66@...kaller.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