Bug#799632: Bug#788708: Bug#799632: iceweasel: SIGSEGV when playing videos via gstreamer

[Sebastian Dröge]

On Sa, 2015-12-05 at 16:28 +0100, Soeren D. Schulze wrote:
> Am 12.11.2015 um 15:02 schrieb Sebastian Dröge:
> > On Do, 2015-11-12 at 14:41 +0100, Soeren D. Schulze wrote:
> > > Hello,
> > > 
> > > the problem does not seem to occur any more with
> > > gstreamer1.0-plugins-bad 1.6.1-1+b1 and iceweasel 38.4.0esr-1.
> > > 
> > > Do you have any specific packages for me to test?
> > 
> > Just a normal jessie installation without installing things from
> > other sources, including sid :) It is definitely fixed since gst-
> > plugins-bad 1.5.X, it's just not clear if the actual bug also
> > exists in jessie or not (and if it doesn't, the fix will also have
> > no effect for people who mix their packages with ones from other
> > sources).
> 
> Hello,
> 
> it is not fixed, alas.  The following SIGSEGV backtrace is with 
> gstreamer1.0-plugins-bad 1.6.1-1+b1 and iceweasel 38.4.0esr-1.  Such 
> crashes are rarer, but they do occur:

Hi,

this is a different bug than the stack corruption related to the faad
plugin though. It looks like broken error handling in iceweasel:
https://github.com/mozilla/gecko-dev/blob/GECKO3840esr_2015102720_RELBRANCH/dom/media/gstreamer/GStreamerReader.cpp#L1464

This line here should check if mapping actually succeeds. Apparently it
doesn't (for whatever reason which might be another bug), as in the
next stack frame all field in frame are 0.


Do you have, by any chance, gstreamer1.0-vaapi installed?
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