On Mon, Jan 04, 2016 at 11:24:14AM -0700, Mathieu Poirier wrote:
> On 20 December 2015 at 08:29, Rabin Vincent <rabin@rab.in> wrote:
> > This patch introduces a use-after-free/double kfree() if the sink is
> > disabled after the source.
> >
> > With this command sequence:
> >
> > # echo 1 > /sys/bus/coresight/devices/54162000.etb/enable_sink
> > # echo 1 > /sys/bus/coresight/devices/5414c000.ptm/enable_source
> > ...
> > # echo 0 > /sys/bus/coresight/devices/54162000.etb/enable_sink
> > # echo 0 > /sys/bus/coresight/devices/5414c000.ptm/enable_source
> 
> Can you send me the full suite of commands to get to this result? I
> simply can't trigger the trace you are collecting on your side.  I
> have the following SLUB debugging settings - can you double check
> yours as well?

The command sequence is exactly as mentioned above.  The kernel is
v4.4rc-8 + all your patches from this thread + the OMAP coresight patch
I mentioned earlier.

The .config and the entire log is attached.  There seems to be also a
lockdep warning for the second command which I missed earlier.