kernel panic in monitor mode (bug?)

[Lubomir Gelo]

On Tue, Jul 08, 2003 at 09:56:05PM +0200, Samuel B. wrote:
> Hi,
> i've found a bug in hostap driver, that produces kernel panic when
> putting wifi card (z-com xi626) in monitor mode.
>
> I google'd a bit and found
> (http://sisyphus.iocaine.com/pipermail/hostap/2003-May/002758.html)
> that
> problem might be somewhere in skb_put() call
> in the driver (i don't have direct access to servers, so i couldn't
> read the 'real' reason for the kernel panic).
> I've tried to fix by just blindly increase allocated buffer (+100
> bytes)
> in every dev_alloc_skb() calls in file hostap_hw.c file. After using
> this
> 'fixed' drivers problem did not apear again...
>
> Unfortunately i couldn't locate where exactly the bug is, since all
> the
> waveboxes i currently have are production servers and restarting them
> very
> often is not a good idea :)
>
> Wavebox config:
>    - at least 2 cards Z-Com xi626
>    - linux-2.4.20 patched with wolk4.1-4.3 (i don't have vanila
>    kernels so
> i couldn't test it there) - wolk includes wireless extension version
> 16
>    - wireless tools v26
>    - latest cvs snapshot of hostap drivers


Problem is in prism2_rx in hostap_hw. I've sent description with patch
to list on Jun 17, and to Jouni directly on Jun 29 but received no reply.

LG