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avformat/segafilm: Check that there is a stream 

Fixes: assertion failure
Fixes: 26472/clusterfuzz-testcase-minimized-ffmpeg_dem_SEGAFILM_fuzzer-5759751591559168

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-22 00:37:25 +02:00
parent 6fb2bdd1d0
commit c0d7fd269b
1 changed files with 3 additions and 0 deletions
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3
libavformat/segafilm.c
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@ -144,6 +144,9 @@ static int film_read_header(AVFormatContext *s)
film->video_type = AV_CODEC_ID_NONE;
}
if (!film->video_type && !film->audio_type)
return AVERROR_INVALIDDATA;
/* initialize the decoder streams */
if (film->video_type) {
st = avformat_new_stream(s, NULL);