r0 = socket$unix(0x1, 0x5, 0x0)
recvmmsg$unix(r0, &(0x7f0000002fc0)=[{{0x0, 0x0, &(0x7f0000001ac0)=[{0x0}, {0x0}], 0x2}}], 0x1, 0x0, &(0x7f0000003040)={0x0, 0x3938700})