Comment 19 for bug 652775

It appears that this may have solved the problem. I haven't experienced the crash or connection dropping yet.

(In reply to comment #10)
> It can be configured in /etc/modprobe.d
>
> echo "options iwlwifi swcrypto=1" >> /etc/modprobe.d/iwlwifi.conf
>
> Until now, it will be used every time iwlwifi module is used, so make it take a
> effect, you need to restart module:
>
> modprobe -r iwlwifi
> modprobe iwlwifi