Comment 25 for bug 592745

I can confirm that:

* powertop crashes my system every time, within about five seconds of starting, just when it starts displaying the first page of info;

* the crash only occurs if the r8192se_pci driver is loaded; the machine seems stable if I rmmod that driver;

* it doesn't seem to be fixed in 2.6.32.59+drm33.24, which is the latest kernel in git for lucid, and presumably the next kernel that will go into lucid-updates.

The panic backtrace also seems to implicate wireless (iwpriv specifically):

Aug 7 20:53:42 classmate kernel: [ 254.849157] r8191se_wx_get_firm_version(): Just Support 92SE tmp
Aug 7 20:53:42 classmate kernel: [ 254.849413] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: c04c6410
Aug 7 20:53:42 classmate kernel: [ 254.849420]
Aug 7 20:53:42 classmate kernel: [ 254.849810] Pid: 2289, comm: iwpriv Tainted: G A 2.6.32.59+drm33.24-cw-custom-dsdt-120731-1 #1
Aug 7 20:53:42 classmate kernel: [ 254.850120] Call Trace:
Aug 7 20:53:42 classmate kernel: [ 254.855314] [<c05873d6>] ? printk+0x1d/0x1f
Aug 7 20:53:42 classmate kernel: [ 254.861481] [<c0587311>] panic+0x47/0xef
Aug 7 20:53:42 classmate kernel: [ 254.866459] [<c014a3ce>] __stack_chk_fail+0x1e/0x20
Aug 7 20:53:42 classmate kernel: [ 254.871734] [<c04c6410>] ? dev_ioctl+0x510/0x520
Aug 7 20:53:42 classmate kernel: [ 254.876686] [<c04c6410>] dev_ioctl+0x510/0x520

renaming iwpriv out of the way also seems to avoid the crash.

Running "iwpriv wlan0 adhoc_peer_list" also seems to provoke the crash, without running powertop. So does "iwpriv -a", which makes this appear to be a duplicate of #585938, as suggested on that bug. I'm currently building a new kernel with the patch linked from that bug (http://people.canonical.com/~apw/lp585938-lucid/).