syz_open_procfs$namespace(0xffffffffffffffff, &(0x7f0000000000)='ns/mnt\x00') ioctl$BTRFS_IOC_SCRUB_CANCEL(0xffffffffffffffff, 0x941c, 0x0) accept4(0xffffffffffffffff, 0x0, 0x0, 0x0) socket$inet6_udplite(0xa, 0x2, 0x88)