linux-kernel - Re: [syzbot] [fs?] [mm?] INFO: rcu detected stall in sys

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Message-ID: <67877426.050a0220.20d369.0009.GAE@google.com>
Date: Wed, 15 Jan 2025 00:39:02 -0800
From: syzbot <syzbot+23e14ec82f3c8692eaa9@...kaller.appspotmail.com>
To: anna-maria@...utronix.de, davem@...emloft.net, frederic@...nel.org, 
	gregkh@...uxfoundation.org, jhs@...atatu.com, jiri@...nulli.us, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, linux-usb@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org, 
	vinicius.gomes@...el.com, xiyou.wangcong@...il.com
Subject: Re: [syzbot] [fs?] [mm?] INFO: rcu detected stall in sys_readlink (5)

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=124487c4580000
start commit:   7dc8f809b87d Merge tag 'linux-can-next-for-6.14-20250110' ..
git tree:       net-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=114487c4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=164487c4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=28dc37e0ec0dfc41
dashboard link: https://syzkaller.appspot.com/bug?extid=23e14ec82f3c8692eaa9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1634f218580000

Reported-by: syzbot+23e14ec82f3c8692eaa9@...kaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

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