Comment 14 for bug 57091

I think this may have introduced a regression. While using aMule on my amd64 Jaunty desktop, there is a point at which the screen freezes and X stops responding to input (the mouse pointer moves, but it does not interact with anything). Ctrl-Shift-F1-6 won't drop me to a TTY. I believe the hang affects X exclusively, since the system continues logging and SysRq keys work fine.

All four times that this has happened I get this line repeatedly in /var/log/messages:

May 18 22:34:27 tinymme kernel: [ 9389.660132] possible SYN flooding on port 34443. Sending cookies.

at a rate of one per minute. These messages start at the same time as X hangs. Port 34443 is the TCP port I configured for use by aMule.

Two issues here:
 - SYN flood protection may be being mis-triggered by legitimate network load
 - the protection itself seems to be causing a problem with X (directly or indirectly)

I wouldn't think this is an interaction between the kernel and X if it weren't for the fact that I've had multiple instances of the problem with the same log entries, but I may as well be missing something (even though other log files are clean). Should I open a new bug report with this?