Re: [syzbot] [overlayfs?] WARNING in fast_dput

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+b74150fd2ef40e716ca2@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+b74150fd2ef40e716ca2@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         d6ea5537 Merge tag 'vfs-6.19-rc1.fd_prepare' of gitoli..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
console output: https://syzkaller.appspot.com/x/log.txt?x=16218512580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=859bdb453c94e06c
dashboard link: https://syzkaller.appspot.com/bug?extid=b74150fd2ef40e716ca2
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.