Re: [syzbot] WARNING: refcount bug in sys_memfd_secret

[syzbot]

syzbot suspects this issue was fixed by commit:

commit 87066fdd2e30fe9dd531125d95257c118a74617e
Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date:   Sun Oct 24 19:48:33 2021 +0000

    Revert "mm/secretmem: use refcount_t instead of atomic_t"

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11cccf06b00000
start commit:   9c0c4d24ac00 Merge tag 'block-5.15-2021-10-22' of git://gi..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=be398dd7862f4b36
dashboard link: https://syzkaller.appspot.com/bug?extid=b904a1de3ec43711eba5
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=130cabdcb00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=175b91acb00000

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

#syz fix: Revert "mm/secretmem: use refcount_t instead of atomic_t"

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