[FFmpeg-cvslog] avcodec/binkaudio: Check sample rate

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Oct 11 00:40:07 2019 +0200| [2fca09bce49c7de590560d9517fd2414b6c0c14f] | committer: Michael Niedermayer

avcodec/binkaudio: Check sample rate

Fixes: signed integer overflow: 1092624416 * 2 cannot be represented in type 'int'
Fixes: 18045/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINKAUDIO_RDFT_fuzzer-5718519492116480

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Reviewed-by: Peter Ross <pross at xvid.org>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2fca09bce49c7de590560d9517fd2414b6c0c14f
---

 libavcodec/binkaudio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index 96cf968c66..2384ebf312 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -95,6 +95,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
     if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT) {
         // audio is already interleaved for the RDFT format variant
         avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
+        if (sample_rate > INT_MAX / avctx->channels)
+            return AVERROR_INVALIDDATA;
         sample_rate  *= avctx->channels;
         s->channels = 1;
         if (!s->version_b)