Re: [PATCH v3 0/4] Fix multiple race condition vulnerabilities in dvb-core and device driver

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Hi Lee,

Em Thu, 9 Mar 2023 17:17:14 +0000
Lee Jones <lee@xxxxxxxxxx> escreveu:

> > > Still nothing heard from the author or any maintainer.  
> >
> > We're currently lacking a sub-maintainer for dvb. Changes at the
> > DVB mutexes have been problematic and require tests on some
> > devices, specially on those with multiple frontends.
> >
> > I'll try to find some time to review and test those patches.  
> 
> Thank you Mauro, I fully appreciate the struggles and the effort.

It took more time than I originally anticipated, as I had to setup
a way to test it here with some DVB-T devices, but I reviewed the
code and tested it.

I'm placing the patches I picked at this series:

	https://lore.kernel.org/lkml/53558de2b5c4f4ee6bfcfbe34e27071c2d0073d5.1684000646.git.mchehab@xxxxxxxxxx/T/#t

They seemed to work fine. I tested using two devices:

	USB ID 2013:0246 PCTV Systems PCTV 74E
	USB ID 2040:5200 Hauppauge NovaT 500Stick

The second one has two DVB-T independent devices on it.

I did some tests of removing and re-inserting them with the
devices closed and with the device opened and streamed. I didn't
find any regressions. I didn't try to use kmemleak or KASAN to
detect UAF conditions, though.

Regards,
Mauro



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