Re: [syzbot] [overlayfs?] KASAN: invalid-free in ovl_copy_up_one

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+477d8d8901756d1cbba1@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         8e9b46c4 ovl: do not encode lower fh with upper sb_wri..
git tree:       https://github.com/amir73il/linux.git ovl_want_write
console output: https://syzkaller.appspot.com/x/log.txt?x=10d10ffa680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bb54ecdfa197f132
dashboard link: https://syzkaller.appspot.com/bug?extid=477d8d8901756d1cbba1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

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