r0 = syz_open_procfs$userns(0xffffffffffffffff, &(0x7f0000002280))
r1 = fcntl$dupfd(r0, 0x0, r0)
mount_setattr(0xffffffffffffff9c, 0x0, 0x0, &(0x7f0000000100)={0x100004, 0x0, 0x0, {r1}}, 0x20)