linux-kernel - Re: [syzbot] [batman?] [mm?] [ext4?] INFO: rcu detected stall in rescuer

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Message-ID: <674cee33.050a0220.48a03.0019.GAE@google.com>
Date: Sun, 01 Dec 2024 15:16:03 -0800
From: syzbot <syzbot+76e180c757e9d589a79d@...kaller.appspotmail.com>
To: a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org, davem@...emloft.net, 
	edumazet@...gle.com, gregkh@...uxfoundation.org, horms@...nel.org, 
	kuba@...nel.org, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, mareklindner@...mailbox.ch, netdev@...r.kernel.org, 
	oneukum@...e.com, pabeni@...hat.com, rafael@...nel.org, 
	stern@...land.harvard.edu, sven@...fation.org, sw@...onwunderlich.de, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [batman?] [mm?] [ext4?] INFO: rcu detected stall in rescuer_thread

syzbot has bisected this issue to:

commit b3e40fc85735b787ce65909619fcd173107113c2
Author: Oliver Neukum <oneukum@...e.com>
Date:   Thu May 2 11:51:40 2024 +0000

    USB: usb_parse_endpoint: ignore reserved bits

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10553d30580000
start commit:   cfaaa7d010d1 Merge tag 'net-6.12-rc8' of git://git.kernel...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12553d30580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14553d30580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d2aeec8c0b2e420c
dashboard link: https://syzkaller.appspot.com/bug?extid=76e180c757e9d589a79d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14486b5f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=112182e8580000

Reported-by: syzbot+76e180c757e9d589a79d@...kaller.appspotmail.com
Fixes: b3e40fc85735 ("USB: usb_parse_endpoint: ignore reserved bits")

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