If the name of a machine (as set with the -name argument) has a length longer than 1024, (RFB) VNC clients will not receive a correct RFB ServerInit message.
The return value of snprintf is used as the value for the name-length field in the ServerInit message.
This is problematic for names that were truncated to 1024, as the length will now be bigger than the actual name.
I think a quick fix would be to simply report min(size,1024) to the client...
If the name of a machine (as set with the -name argument) has a length longer than 1024, (RFB) VNC clients will not receive a correct RFB ServerInit message.
I suspect this is the problem:
https:/ /github. com/qemu/ qemu/blob/ master/ ui/vnc. c#L2463
The return value of snprintf is used as the value for the name-length field in the ServerInit message.
This is problematic for names that were truncated to 1024, as the length will now be bigger than the actual name.
I think a quick fix would be to simply report min(size,1024) to the client...