mac80211, iwlwifi and packet injection

["Robert Führicht" <the_master_of_disaster@gmx.at>]

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Hi,

I wanted to try out packet injection with my ipw3945 card, and was
thrilled that there are patches by Andy Green for mac80211 that should
make everything that is needed for this possible.

So I patched 2.6.23-rc3 with wireless-git's everything branch, but when
attemting to inject, Andy's packetspammer (and aireplay -9
from aircrack-ng 1.0-dev) hung.

After reporting this to him and several mails I switched on debugging
flags, and modprobed iwl3945 with 'debug=0x43fff', ifconfig then oopsed:

modprobe iwl3945 debug=0x43fff
iwconfig wlan0 mode monitor
ifconfig wlan0 up
--- OOPS --- (see attachment)

When omitting the debug parameter, ifconfig succeeds but the injection
tools then hang. SysRq lets me reboot the system, as you can see in the
syslog excerpt I provided.

I attached the .config I am using, the system in question is a Dell
Inspiron 9400, running Gentoo Linux. Before attempting any of this, all
unused processes were killed, leaving only udev, metalog and vixie-cron.
And yes, I know it says the kernel is tainted, because of the nvidia
module. Say so and I'll try again without it, but quite frankly, I
don't think that makes a difference...

uname -a:
Linux doppelhertz 2.6.23-rc3 #2 SMP PREEMPT Wed Aug 29 03:06:47 CEST
2007 x86_64 Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz GenuineIntel
GNU/Linux

Thanks in advance for your help,
Robert

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