linux-kernel - Re: [syzbot] [mm?] [ext4?] WARNING in ext4_init_orphan

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Message-ID: <68bf33e3.a70a0220.7a912.02c3.GAE@google.com>
Date: Mon, 08 Sep 2025 12:52:03 -0700
From: syzbot <syzbot+0b92850d68d9b12934f5@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, akpm@...ux-foundation.org, apopple@...dia.com, 
	byungchul@...com, david@...hat.com, gourry@...rry.net, jack@...e.cz, 
	joshua.hahnjy@...il.com, linux-ext4@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, matthew.brost@...el.com, 
	rakie.kim@...com, syzkaller-bugs@...glegroups.com, tytso@....edu, 
	ying.huang@...ux.alibaba.com, ziy@...dia.com
Subject: Re: [syzbot] [mm?] [ext4?] WARNING in ext4_init_orphan_info

syzbot has bisected this issue to:

commit 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37
Author: Jan Kara <jack@...e.cz>
Date:   Mon Aug 16 09:57:06 2021 +0000

    ext4: Speedup ext4 orphan inode handling

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16645562580000
start commit:   76eeb9b8de98 Linux 6.17-rc5
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15645562580000
console output: https://syzkaller.appspot.com/x/log.txt?x=11645562580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=429771c55b615e85
dashboard link: https://syzkaller.appspot.com/bug?extid=0b92850d68d9b12934f5
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=168d2562580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15869562580000

Reported-by: syzbot+0b92850d68d9b12934f5@...kaller.appspotmail.com
Fixes: 02f310fcf47f ("ext4: Speedup ext4 orphan inode handling")

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