r0 = memfd_create(&(0x7f0000000000)='/proc/thread-self/attr/fscreate\x00', 0x0)
fallocate(r0, 0x0, 0x0, 0x3f)
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000040)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendfile(r1, r0, 0x0, 0x9)