r0 = socket$nl_generic(0x10, 0x3, 0x10) sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000640)={0x0, 0x0, &(0x7f0000000600)={&(0x7f00000005c0)={0x14}, 0x14}}, 0x0) syz_genetlink_get_family_id$gtp(&(0x7f0000000900), r0)