[FFmpeg-cvslog] avformat/vividas: Check number of audio channels

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 26 11:50:28 2020 +0100| [66deab3a2609aa9462709c82be5d4efbb6af2a08] | committer: Michael Niedermayer

avformat/vividas: Check number of audio channels

Fixes: division by 0
Fixes: 28597/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5752201490333696

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=66deab3a2609aa9462709c82be5d4efbb6af2a08
---

 libavformat/vividas.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/vividas.c b/libavformat/vividas.c
index 96e0631b06..d745770dc4 100644
--- a/libavformat/vividas.c
+++ b/libavformat/vividas.c
@@ -373,7 +373,7 @@ 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)
+        if (st->codecpar->sample_rate <= 0 || st->codecpar->channels <= 0)
             return AVERROR_INVALIDDATA;
         avio_seek(pb, 10, SEEK_CUR); // data_1
         q = avio_r8(pb);