linux-kernel - Re: [syzbot] [cgroups?] possible deadlock in task_rq

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Message-ID: <000000000000b91f33061fefcfbb@google.com>
Date: Sun, 18 Aug 2024 00:05:02 -0700
From: syzbot <syzbot+ca14b36a46a8c541b509@...kaller.appspotmail.com>
To: bristot@...nel.org, cgroups@...r.kernel.org, hannes@...xchg.org, 
	hdanton@...a.com, juri.lelli@...hat.com, linux-kernel@...r.kernel.org, 
	lizefan.x@...edance.com, mkoutny@...e.com, peterz@...radead.org, 
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org, 
	vincent.guittot@...aro.org, vineeth@...byteword.org
Subject: Re: [syzbot] [cgroups?] possible deadlock in task_rq_lock

syzbot has bisected this issue to:

commit 5f6bd380c7bdbe10f7b4e8ddcceed60ce0714c6d
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Mon May 27 12:06:55 2024 +0000

    sched/rt: Remove default bandwidth control

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11a668dd980000
start commit:   367b5c3d53e5 Add linux-next specific files for 20240816
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=13a668dd980000
console output: https://syzkaller.appspot.com/x/log.txt?x=15a668dd980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=61ba6f3b22ee5467
dashboard link: https://syzkaller.appspot.com/bug?extid=ca14b36a46a8c541b509
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13d6dbf3980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=142413c5980000

Reported-by: syzbot+ca14b36a46a8c541b509@...kaller.appspotmail.com
Fixes: 5f6bd380c7bd ("sched/rt: Remove default bandwidth control")

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