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matroskadec: fix NULL pointer dereference in webm_dash_manifest_read_header

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The code assumes that s->streams[0] is valid.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit ff100c9dd9)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun
2016-11-08 00:42:23 +01:00
parent 1e4979f780
commit fa24e3780b
1 changed files with 5 additions and 0 deletions
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libavformat/matroskadec.c
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@@ -3772,6 +3772,11 @@ static int webm_dash_manifest_read_header(AVFormatContext *s)
av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
return -1;
}
if (!s->nb_streams) {
matroska_read_close(s);
av_log(s, AV_LOG_ERROR, "No streams found\n");
return AVERROR_INVALIDDATA;
}
if (!matroska->is_live) {
buf = av_asprintf("%g", matroska->duration);