Re: [syzbot] [fs?] general protection fault in __umount_mnt

[syzbot]

Hello,

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

Reported-by: syzbot+e4470cc28308f2081ec8@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+e4470cc28308f2081ec8@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         14594a14 mount: always duplicate mount
git tree:       https://github.com/brauner/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=17e5aa06580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d485346661badf84
dashboard link: https://syzkaller.appspot.com/bug?extid=e4470cc28308f2081ec8
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

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