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matroskademux: Ignore unexpected CodecState

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Because GstMatroskaTrackContext *stream is set up in the first
SimpleBlock or Block, a rogue CodecState otherwise causes a segfault on
derefencing the NULL pointer. Test case:
bug_s5506167_r0.001____gst_matroska_demux_parse_blockgroup_or_simpleblock.webm
This commit is contained in:
Philip Jägenstedt 2010-05-12 14:30:18 +02:00 committed by Sebastian Dröge
parent 9dc7889eea
commit d146971128
1 changed files with 6 additions and 0 deletions
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6
gst/matroska/matroska-demux.c
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@ -4531,6 +4531,12 @@ gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux,
&data_len)) != GST_FLOW_OK) &data_len)) != GST_FLOW_OK)
break; break;
if (G_UNLIKELY (stream == NULL)) {
GST_WARNING_OBJECT (demux,
"Unexpected CodecState subelement - ignoring");
break;
}
g_free (stream->codec_state); g_free (stream->codec_state);
stream->codec_state = data; stream->codec_state = data;
stream->codec_state_size = data_len; stream->codec_state_size = data_len;