Dear Sirs,

Commit : the max length of udp msg is (0xFFFF - sizeof(struct udphdr) - 
sizeof(struct iphdr). return -EMSGSIZE in udp_sendmsg.
Patch : as the attached file

____________________________________________________________
| IP header |  UDP header | udp data ........                             |
|___________|______________|_________________________________|
|--> Total Length : 
0xffff                                                       <--|


If length of "data" is between (0xFFFF - sizeof(struct udphdr) - 
sizeof(struct iphdr) and 0xFFFF, sendto will fail because of ip_make_skb.
Should kernel return -EMSGSIZE as soon as possible ?


-- 
Zhenwei Pi
Rather than love ,than money ,than faith,than fame,than fairness,give me truth.