linux-ext4 - Re: [syzbot] [ext4?] WARNING in __find_get

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Message-ID: <67618c16.050a0220.37aaf.019c.GAE@google.com>
Date: Tue, 17 Dec 2024 06:35:02 -0800
From: syzbot <syzbot+3c9f079f8fb1d7d331be@...kaller.appspotmail.com>
To: Yuezhang.Mo@...y.com, brauner@...nel.org, daniel.palmer@...y.com, 
	hirofumi@...l.parknet.co.jp, jack@...e.com, jack@...e.cz, 
	linkinjeon@...nel.org, linux-ext4@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	sj1557.seo@...sung.com, syzkaller-bugs@...glegroups.com, tytso@....edu, 
	viro@...iv.linux.org.uk, wataru.aoyama@...y.com, yuezhang.mo@...y.com
Subject: Re: [syzbot] [ext4?] WARNING in __find_get_block (2)

syzbot has bisected this issue to:

commit 8a3f5711ad74db9881b289a6e34d7f3b700df720
Author: Yuezhang Mo <Yuezhang.Mo@...y.com>
Date:   Thu Sep 12 08:57:06 2024 +0000

    exfat: reduce FAT chain traversal

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=156b5730580000
start commit:   f44d154d6e3d Merge tag 'soc-fixes-6.13' of git://git.kerne..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=176b5730580000
console output: https://syzkaller.appspot.com/x/log.txt?x=136b5730580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1234f097ee657d8b
dashboard link: https://syzkaller.appspot.com/bug?extid=3c9f079f8fb1d7d331be
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15e302df980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1265b4f8580000

Reported-by: syzbot+3c9f079f8fb1d7d331be@...kaller.appspotmail.com
Fixes: 8a3f5711ad74 ("exfat: reduce FAT chain traversal")

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