[FFmpeg-devel] [PATCH 2/2] avcodec/binkaudio: Check sample_rate to avoid integer overflow

[Michael Niedermayer]

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 19950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINKAUDIO_DCT_fuzzer-5765514337189888

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 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index 64a08b8608..2df3dc645a 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -106,6 +106,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
         avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
     }
 
+    if (sample_rate >= INT_MAX)
+        return AVERROR_INVALIDDATA;
+
     s->frame_len     = 1 << frame_len_bits;
     s->overlap_len   = s->frame_len / 16;
     s->block_size    = (s->frame_len - s->overlap_len) * s->channels;
-- 
2.17.1