r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
r1 = dup(r0)
r2 = dup(r1)
recvmmsg$unix(r2, &(0x7f0000000340)=[{{0x0, 0x0, 0x0}}], 0x1, 0x100, 0x0)