netdev - Re: INFO: rcu detected stall in netlink

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Message-ID: <00000000000091792505ab278f0a@google.com>
Date:   Thu, 23 Jul 2020 20:28:04 -0700
From:   syzbot <syzbot+0fb70e87d8e0ac278fe9@...kaller.appspotmail.com>
To:     a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        davem@...emloft.net, jhs@...atatu.com, jiri@...nulli.us,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        mareklindner@...mailbox.ch, mingo@...hat.com,
        netdev@...r.kernel.org, rostedt@...dmis.org, sven@...fation.org,
        sw@...onwunderlich.de, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, vinicius.gomes@...el.com,
        xiyou.wangcong@...il.com
Subject: Re: INFO: rcu detected stall in netlink_sendmsg (4)

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=16d46e1b100000
start commit:   7cc2a8ea Merge tag 'block-5.8-2020-07-01' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d46e1b100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7be693511b29b338
dashboard link: https://syzkaller.appspot.com/bug?extid=0fb70e87d8e0ac278fe9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1023588f100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1647a88f100000

Reported-by: syzbot+0fb70e87d8e0ac278fe9@...kaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

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