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

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Date:   Mon, 01 Nov 2021 01:54:12 -0700
From:   syzbot <syzbot+bb950e68b400ab4f65f8@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, bigeasy@...utronix.de,
        fweisbec@...il.com, linux-kernel@...r.kernel.org, mingo@...nel.org,
        peterz@...radead.org, pmladek@...e.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        valentin.schneider@....com
Subject: Re: [syzbot] INFO: rcu detected stall in snd_seq_write (2)

syzbot has bisected this issue to:

commit 1a7243ca4074beed97b68d7235a6e34862fc2cd6
Author: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Date:   Tue Nov 10 11:38:47 2020 +0000

    kthread: Move prio/affinite change into the newly created thread

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10b30e6ab00000
start commit:   bdcc9f6a5682 Add linux-next specific files for 20211029
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12b30e6ab00000
console output: https://syzkaller.appspot.com/x/log.txt?x=14b30e6ab00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4b504bcb4c507265
dashboard link: https://syzkaller.appspot.com/bug?extid=bb950e68b400ab4f65f8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16e913bab00000

Reported-by: syzbot+bb950e68b400ab4f65f8@...kaller.appspotmail.com
Fixes: 1a7243ca4074 ("kthread: Move prio/affinite change into the newly created thread")

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