linux-kernel - Re: [syzbot] [block?] [usb?] INFO: rcu detected stall in aoecmd

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Date: Sun, 12 May 2024 04:05:03 -0700
From: syzbot <syzbot+1e6e0b916b211bee1bd6@...kaller.appspotmail.com>
To: axboe@...nel.dk, gregkh@...uxfoundation.org, hdanton@...a.com, 
	justin@...aid.com, linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-usb@...r.kernel.org, loberman@...hat.com, marcello.bauer@...ements.com, 
	rafael@...nel.org, stern@...land.harvard.edu, sylv@...v.io, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [block?] [usb?] INFO: rcu detected stall in aoecmd_cfg (2)

syzbot has bisected this issue to:

commit a7f3813e589fd8e2834720829a47b5eb914a9afe
Author: Marcello Sylvester Bauer <sylv@...v.io>
Date:   Thu Apr 11 14:51:28 2024 +0000

    usb: gadget: dummy_hcd: Switch to hrtimer transfer scheduler

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12415cd0980000
start commit:   9221b2819b8a Add linux-next specific files for 20240503
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11415cd0980000
console output: https://syzkaller.appspot.com/x/log.txt?x=16415cd0980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8ab537f51a6a0d98
dashboard link: https://syzkaller.appspot.com/bug?extid=1e6e0b916b211bee1bd6
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15661898980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=161a5d1f180000

Reported-by: syzbot+1e6e0b916b211bee1bd6@...kaller.appspotmail.com
Fixes: a7f3813e589f ("usb: gadget: dummy_hcd: Switch to hrtimer transfer scheduler")

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