r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
mmap(&(0x7f0000002000/0x3000)=nil, 0x3000, 0x0, 0x12, r0, 0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000300)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
writev(r1, &(0x7f0000000440)=[{0x0}, {&(0x7f0000002e40)='m', 0x1}], 0x2)