linux-kernel - Re: KMSAN: uninit-value in rt2500usb_probe

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Message-ID: <CACT4Y+aBTN3HzDWADsvD053T=qszSu5wGTCijM-kj9xZXDHTyg@mail.gmail.com>
Date:   Sat, 26 Sep 2020 08:53:07 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Anant Thazhemadam <anant.thazhemadam@...il.com>
Cc:     Alexander Potapenko <glider@...gle.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        syzbot <syzbot+35c80b2190255a410f66@...kaller.appspotmail.com>,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: KMSAN: uninit-value in rt2500usb_probe_hw

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/