linux-kernel - Re: [syzbot] INFO: rcu detected stall in hub

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Date:   Sat, 30 Jul 2022 03:27:10 -0700
From:   syzbot <syzbot+ec5f884c4a135aa0dbb9@...kaller.appspotmail.com>
To:     andreyknvl@...gle.com, balbi@...nel.org,
        benjamin.tissoires@...hat.com, fweisbec@...il.com,
        gregkh@...uxfoundation.org, jikos@...nel.org,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, mingo@...nel.org,
        quic_mrana@...cinc.com, rafael@...nel.org,
        stern@...land.harvard.edu, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de
Subject: Re: [syzbot] INFO: rcu detected stall in hub_event

syzbot has bisected this issue to:

commit 859bdc359567f5fa8e8dc780d7b5e53ea43d9ce9
Author: Mayank Rana <quic_mrana@...cinc.com>
Date:   Wed May 18 18:12:52 2022 +0000

    usb: dwc3: core: Add error log when core soft reset failed

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=144812f2080000
start commit:   6e2c0490769e Merge tag 'drm-fixes-2022-07-29' of git://ano..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=164812f2080000
console output: https://syzkaller.appspot.com/x/log.txt?x=124812f2080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=26034e6fe0075dad
dashboard link: https://syzkaller.appspot.com/bug?extid=ec5f884c4a135aa0dbb9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=119bc436080000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16c3c0f2080000

Reported-by: syzbot+ec5f884c4a135aa0dbb9@...kaller.appspotmail.com
Fixes: 859bdc359567 ("usb: dwc3: core: Add error log when core soft reset failed")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection