[FFmpeg-devel] [PATCH 1/5] avcodec/binkaudio: Check sample rate

[Michael Niedermayer]

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
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 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)
-- 
2.23.0