[FFmpeg-devel] [PATCH 1/2] avcodec/speexdec: Check frames_per_packet more completely

[Michael Niedermayer]

Fixes: signed integer overflow: 2105344 * 539033345 cannot be represented in type 'int'
Fixes: out of array write
Fixes: 39956/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEX_fuzzer-4766419250708480

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

diff --git a/libavcodec/speexdec.c b/libavcodec/speexdec.c
index 4c50f54f27b..05f084de2e5 100644
--- a/libavcodec/speexdec.c
+++ b/libavcodec/speexdec.c
@@ -1428,7 +1428,7 @@ static int parse_speex_extradata(AVCodecContext *avctx,
         return AVERROR_INVALIDDATA;
     s->vbr = bytestream_get_le32(&buf);
     s->frames_per_packet = bytestream_get_le32(&buf);
-    if (s->frames_per_packet <= 0)
+    if (s->frames_per_packet <= 0 || s->frames_per_packet >= INT32_MAX / s->frame_size)
         return AVERROR_INVALIDDATA;
     s->extra_headers = bytestream_get_le32(&buf);
 
-- 
2.17.1