socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg(r0, &(0x7f0000000fc0)={0x0, 0x0, &(0x7f00000052c0)=[{&(0x7f0000000000)='\x00', 0x1}, {&(0x7f0000000480)='4', 0x1}], 0x2}, 0x40011)
recvmsg(r1, &(0x7f0000000200)={0x0, 0x0, 0x0}, 0x12101)
recvmmsg(r1, &(0x7f00000008c0)=[{{0x0, 0x0, &(0x7f0000000300)=[{&(0x7f00000000c0)=""/252, 0xfc}], 0x1}}, {{0x0, 0x0, 0x0}}], 0x2, 0x40, 0x0)