r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$BATADV_CMD_GET_BLA_BACKBONE(r0, &(0x7f0000001100)={0x0, 0x0, &(0x7f00000010c0)={&(0x7f0000001040)={0x14}, 0xfffffdef}}, 0x0)