syzbot suspects this issue was fixed by commit:

commit 97f044f690bac2b094bfb7fb2d177ef946c85880
Author: Miklos Szeredi [off-list ref]
Date:   Fri Oct 22 15:03:02 2021 +0000

    fuse: don't increment nlink in link()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10563ac9b00000
start commit:   1da38549dd64 Merge tag 'nfsd-5.15-3' of git://git.kernel.o..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=e2ffb281e6323643
dashboard link: https://syzkaller.appspot.com/bug?extid=1c8034b9f0e640f9ba45
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11f16d57300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15758d57300000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fuse: don't increment nlink in link()

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