[ath9k-devel] modprobe ath9k == BUG: unable to handle kernel NULL pointer dereference at 000001dc

[Joseph Cheek <joseph@cheek.com>]

ok.  I just got a repro on 2.6.27.11 with compat-wireless-2008-12-31. 
it appears to occur when i bring down the interface, rmmod ath9k, and
then modprobe ath9k while I am trying to rsync from or to the box.  I
bounce the interface like this often when I lose transmission for
several seconds at a time.  most of the time it recovers ok, but
sometimes it doesn't.

i'll try git tip on monday.

Thanks!

Joseph

Luis R. Rodriguez wrote:
> On Thu, Jan 22, 2009 at 11:19:00AM -0800, Joseph Cheek wrote:
>   
>> I just got a repro of this on 2.6.27.12 with compat-wireless
>> 2009-01-19.  i'm going back to 2.6.27.11 with compat-wireless 2008-12-31
>> to see if it is more stable (I never got the bug on that one).
>>
>> here are the config_debug options i had on for this last strace.  please
>> let me know what other options you would like me to turn on so i can
>> make the trace more useful.
>>
>> thanks!
>>
>> Joseph Cheek
>>
>> CONFIG_DEBUG_KERNEL=y
>> CONFIG_DEBUG_PREEMPT=y
>> CONFIG_DEBUG_BUGVERBOSE=y
>> CONFIG_DEBUG_INFO=y
>> CONFIG_DEBUG_MEMORY_INIT=y
>> CONFIG_DEBUG_PAGEALLOC=y
>>     
>
> These are good, CONFIG_DEBUG_INFO=y is what I was looking for too.
> Not sure why you don't get what I expect. Try using ksymoops then,
> or you can also just recompile using wireless-testing kernel directly:
>
> http://wireless.kernel.org/en/developers/Documentation/git-guide
>
> This has the latest RC kernel + all the wireless stuff we have queued up
> for 2.6.30 (what compat-wireless picks up).
>
>   Luis
>
>