When I moved to another room in the office, my laptop started getting this kernel panic. So far, this means that I can't use the wireless network. I can work around this by either blacklisting the iwl4965 module or by turning the wireless card off with the hardware rfkill switch.
Maybe related: this laptop gets "ACPI: EC: non-query interrupt received, switching to interrupt mode" during boot.
I will report this panic to both the debian bug tracker and the linux-wireless list, let's see how they resolve it.