[FFmpeg-cvslog] avformat/vividas: Check sample_rate

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Nov 10 22:36:25 2020 +0100| [b1bced5433adcf5ad743d929c788b66af9efaf24] | committer: Michael Niedermayer

avformat/vividas: Check sample_rate

Fixes: Assertion c > 0 failed at libavutil/mathematics.c
Fixes: 27001/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5726041328582656
Fixes: 27453/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5716060384526336

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b1bced5433adcf5ad743d929c788b66af9efaf24
---

 libavformat/vividas.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/vividas.c b/libavformat/vividas.c
index 4adc125439..96e0631b06 100644
--- a/libavformat/vividas.c
+++ b/libavformat/vividas.c
@@ -373,6 +373,8 @@ static int track_header(VividasDemuxContext *viv, AVFormatContext *s,  uint8_t *
         avio_rl16(pb); //codec_subid
         st->codecpar->channels = avio_rl16(pb); // channels
         st->codecpar->sample_rate = avio_rl32(pb); // sample_rate
+        if (st->codecpar->sample_rate <= 0)
+            return AVERROR_INVALIDDATA;
         avio_seek(pb, 10, SEEK_CUR); // data_1
         q = avio_r8(pb);
         avio_seek(pb, q, SEEK_CUR); // data_2