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:         7d0a66e4 Linux 6.18
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10b5c192580000
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.