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