I have been working on a WPA cracking rig using nvidia Gforce 9800GTX+ cards and have been struggling with the same error for a few months now.
I am feeding Crunch into pyrit (r265) into cowpatty and I'm getting about 3000 passwords a second. This will run for either minutes or days and then die with a "fread success error". dmesg says it is something along the lines of a "segment fault...python2.5...error [4,6,7]".
I have tried to run pyrit using "/usr/bin/python2.6 /usr/bin/pyrit...." as well as "/python3/" and they won't even try and run. I have also tried installing the latest pyrit using "/usr/bin/pything2.6 setup.py" and that won't run either.
I am almost positive it is a pyrit issue because I have run crunch into cowpatty and it ran without issue for almost a week. I have also done plenty of other trouble shooting but it would take too long for me to type it all up and nobody wants to read about that much failure.
Any input is appreciated.