linux-kernel - Re: [syzbot] [kernfs?] possible deadlock in kernfs_iop

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Message-ID: <687cf00f.a70a0220.693ce.00c1.GAE@google.com>
Date: Sun, 20 Jul 2025 06:33:03 -0700
From: syzbot <syzbot+4bb2305559463e8f6a2a@...kaller.appspotmail.com>
To: axboe@...nel.dk, gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, 
	ming.lei@...hat.com, syzkaller-bugs@...glegroups.com, 
	thomas.hellstrom@...ux.intel.com, tj@...nel.org
Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_iop_getattr

syzbot has bisected this issue to:

commit ffa1e7ada456087c2402b37cd6b2863ced29aff0
Author: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
Date:   Tue Mar 18 09:55:48 2025 +0000

    block: Make request_queue lockdep splats show up earlier

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12d9a38c580000
start commit:   bf61759db409 Merge tag 'sched_ext-for-6.16-rc6-fixes' of g..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11d9a38c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=16d9a38c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=415e83411fefd73f
dashboard link: https://syzkaller.appspot.com/bug?extid=4bb2305559463e8f6a2a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1242b7d4580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12b6238c580000

Reported-by: syzbot+4bb2305559463e8f6a2a@...kaller.appspotmail.com
Fixes: ffa1e7ada456 ("block: Make request_queue lockdep splats show up earlier")

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