socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000300)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
writev(r0, &(0x7f0000000440)=[{0x0}, {0x0}, {&(0x7f0000002e40)='m', 0x1}], 0x3)