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

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Message-ID: <67a79eb3.050a0220.3d72c.002b.GAE@google.com>
Date: Sat, 08 Feb 2025 10:13:07 -0800
From: syzbot <syzbot+2cca5ef7e5ed862c0799@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, brauner@...nel.org, jack@...e.cz, 
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mjguzik@...il.com, 
	syzkaller-bugs@...glegroups.com, tytso@....edu, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [ext4?] WARNING in inode_set_cached_link

syzbot has bisected this issue to:

commit 6408a56623761f969537b421d99f045a4cc955b9
Author: Mateusz Guzik <mjguzik@...il.com>
Date:   Tue Feb 4 21:32:07 2025 +0000

    vfs: sanity check the length passed to inode_set_cached_link()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=152ffca4580000
start commit:   808eb958781e Add linux-next specific files for 20250206
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=172ffca4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=132ffca4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=88b25e5d30d576e4
dashboard link: https://syzkaller.appspot.com/bug?extid=2cca5ef7e5ed862c0799
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=161241b0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16ee80e4580000

Reported-by: syzbot+2cca5ef7e5ed862c0799@...kaller.appspotmail.com
Fixes: 6408a5662376 ("vfs: sanity check the length passed to inode_set_cached_link()")

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