linux-kernel - Re: INFO: rcu detected stall in iterate_cleanup

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Message-ID: <00000000000066afb205aac98b9d@google.com>
Date:   Sun, 19 Jul 2020 04:18:07 -0700
From:   syzbot <syzbot+cc8495ea4052b9b79b72@...kaller.appspotmail.com>
To:     Markus.Elfring@....de, davem@...emloft.net, hdanton@...a.com,
        jhs@...atatu.com, jiri@...nulli.us, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, vinicius.gomes@...el.com,
        xiyou.wangcong@...il.com
Subject: Re: INFO: rcu detected stall in iterate_cleanup_work (2)

syzbot has bisected this issue to:

commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@...el.com>
Date:   Sat Sep 29 00:59:43 2018 +0000

    tc: Add support for configuring the taprio scheduler

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=141ed087100000
start commit:   cd77006e Merge tag 'hyperv-fixes-signed' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=121ed087100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7be693511b29b338
dashboard link: https://syzkaller.appspot.com/bug?extid=cc8495ea4052b9b79b72
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12e567e5100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=126ffccd100000

Reported-by: syzbot+cc8495ea4052b9b79b72@...kaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

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