CVE-2024-36946 phonet: fix rtm_phonet_notify() skb allocation

In the Linux kernel, the following vulnerability has been resolved: phonet: fix rtmphonetnotify skb allocation fillroute stores three components in the skb: - struct rtmsg - RTADST u8 - RTAOIF u32 Therefore, rtmphonetnotify should use NLMSGALIGNsizeofstruct rtmsg + nlatotalsize1 + nlatotalsize4...