On 05/18/2011 03:06 AM, Mark Huijgen wrote:
> Hi Larry,
>
> I tried the new rtlwifi/rtl8192se driver you recently added to wireless testing
> via compat-wireless-2011-05-16 on ubuntu 11.04.
>
> It loads fine and scanning works also. However as soon as I connect to an AP the
> kernel locks up and the system reboots.
> I tried ubuntu's linux crashdump tool to obtain the vmcore, but it seems to be
> broken (https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/710733).
>
> I was able to capture the crash output with my mobile phone's camera, quality is
> not great, but its readable.
>
> Its a kernel NULL pointer dereference in by the looks of it an IRQ handler.
>
> Kernel used is stock ubuntu 2.6.38-8-generic-pae, but I get a similar crash on
> older maverick kernel too (2.6.35-22-generic-pae).
>
> I hope this info is usefull enough to find the cause. If there is anything I can
> do to obtain more info let me know. Also happy to test any patches etc.
Mark,
This problem has to do with backporting of some rcu-handling code to
compat-wireless, and is affecting a number of drivers. See the thread at
http://marc.info/?l=linux-wireless&m=130570674417145&w=2 for some details. I
added the linux-wireless mailing list to the Cc.
I'll let you know when a fix is available.
Larry