On Fri, 2010-04-16 at 14:31 +0200, Jan Kiszka wrote:
> Gilles Chanteperdrix wrote:
> > GIT version control wrote:
> >> Module: xenomai-jki
> >> Branch: for-upstream
> >> Commit: 55ebde80258b5b6c3d29d37b5f30a3199faf0881
> >> URL:    
> >> http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=55ebde80258b5b6c3d29d37b5f30a3199faf0881
> >>
> >> Author: Wolfgang Mauerer <wolfgang.maue...@siemens.com>
> >> Date:   Tue Mar 30 11:13:33 2010 +0200
> >>
> >> RTDM: Fix potential NULL pointer dereference
> >>
> >> The rework in 95278926edc559d4 misses the case that context can be NULL,
> >> which can (and has) triggered a kernel oops. Take care of this case.
> >>
> >> Signed-off-by: Wolfgang Mauerer <wolfgang.maue...@siemens.com>
> >> Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
> > 
> > I still think that fix is a useles waste of time. Let us merge
> > Philippe's patches instead.
> 
> Please accept that Philippe's patch is orthogonal to this bug.
> 
> And it didn't work as-is. I'll post a rework which has the same benefit
> (avoiding to poll on pending context references) - once it is tested.

You mean that your current implementation, does poll, right? Because
mine does not, that was the point of it, also to solve races in
cross-context management IIRC. That patch dates back to the 2.5 -rc
cycle, when I needed it to have a decent behavior while working on the
RTIPC stuff. It should not be that difficult to forward port it to
-head, I guess. Let me know if I can help.

> 
> Jan
> 


-- 
Philippe.



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