linux-kernel - Re: [syzbot] [usb] INFO: rcu detected stall in newfstatat (3)

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Date: Thu, 07 Mar 2024 01:22:01 -0800
From: syzbot <syzbot+96127c74434e19e4609d@...kaller.appspotmail.com>
To: brauner@...nel.org, davem@...emloft.net, edumazet@...gle.com, 
	gregkh@...uxfoundation.org, jack@...e.cz, jiri@...dia.com, jmorris@...ei.org, 
	kuba@...nel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-media@...r.kernel.org, linux-security-module@...r.kernel.org, 
	linux-usb@...r.kernel.org, mchehab@...nel.org, netdev@...r.kernel.org, 
	oneukum@...e.com, pabeni@...hat.com, paul@...l-moore.com, 
	penguin-kernel@...ove.sakura.ne.jp, sean@...s.org, serge@...lyn.com, 
	stern@...land.harvard.edu, syzkaller-bugs@...glegroups.com, 
	takedakn@...data.co.jp, tomoyo-dev-en-owner@...ts.osdn.me, 
	tomoyo-dev-en@...ts.osdn.me, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [usb] INFO: rcu detected stall in newfstatat (3)

syzbot has bisected this issue to:

commit c2368b19807affd7621f7c4638cd2e17fec13021
Author: Jiri Pirko <jiri@...dia.com>
Date:   Fri Jul 29 07:10:35 2022 +0000

    net: devlink: introduce "unregistering" mark and use it during devlinks iteration

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14dc6736180000
start commit:   29cd507cbec2 Merge tag 'integrity-v6.8-fix' of git://git.k..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16dc6736180000
console output: https://syzkaller.appspot.com/x/log.txt?x=12dc6736180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=70429b75d4a1a401
dashboard link: https://syzkaller.appspot.com/bug?extid=96127c74434e19e4609d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11767d61180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15f691a6180000

Reported-by: syzbot+96127c74434e19e4609d@...kaller.appspotmail.com
Fixes: c2368b19807a ("net: devlink: introduce "unregistering" mark and use it during devlinks iteration")

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