unlinkat(0xffffffffffffffff, 0x0, 0x200)
r0 = memfd_create(&(0x7f00000001c0)='}&@\x00', 0x6)
pread64(r0, &(0x7f0000000340)=""/140, 0x8c, 0x0)
ioctl$BTRFS_IOC_WAIT_SYNC(0xffffffffffffffff, 0x40089416, 0x0)