Re: [PATCH v4l-utils] libdvbv5: leaks and double free in dvb_fe_open_fname()

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Em Fri, 26 Apr 2019 18:08:22 +0200
Gregor Jasny <gjasny@xxxxxxxxxxxxxx> escreveu:

> Hello,
> 
> On Fri, 26 Apr 2019, 17:42 Mauro Carvalho Chehab, <
> mchehab+samsung@xxxxxxxxxx> wrote:  
> 
> > Gregor,
> >
> > This patch messed with all branches since stable-1.12. I applied the revert
> > patch already on all affected stable branches.
> >
> > We should probably release a new fix for them soon.
> >
> > Sorry for not looking this earlier.. I got some vacations earlier
> > this month.
> >  
> 
> I also got a report in Debian:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927341
> 
> I'm wondering if we could improve code quality by doing some automated
> testing. 

That's my dream as well.

> Is there a dummy dvb driver like vivi available?

Unfortunately, we don't have a full dummy dvb driver. There are some
dummy DVB frontend drivers, but they're really dummy do-nothing
drivers. We would need to add more stuff there for them to work, and
then add a virtual DVB driver on the top of it.

Doable, but requires someone with time for coding that.

To be fair, a DVB dummy driver is a lot easier than a V4L2 one, as
the DVB core already handles most of the stuff. The most complex
part would likely to use the vivid image generator converting it
into some video stream supported by DVB apps (the best would be
to encode it as MPEG-2 - as all apps support). We could use, on
a first version, some previously encoded video - or - even easier
- to just stream empty frames.

Thanks,
Mauro



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