[FFmpeg-devel] [PATCH 4/4] avcodec/speedhq: Check buf_size to be big enough for DC

[Michael Niedermayer]

Fixes: Timeout
Fixes: 51919/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEDHQ_fuzzer-6023716480090112

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

diff --git a/libavcodec/speedhq.c b/libavcodec/speedhq.c
index 6dbba02776a..04ba4dd19c5 100644
--- a/libavcodec/speedhq.c
+++ b/libavcodec/speedhq.c
@@ -500,6 +500,8 @@ static int speedhq_decode_frame(AVCodecContext *avctx, AVFrame *frame,
 
     if (buf_size < 4 || avctx->width < 8 || avctx->width % 8 != 0)
         return AVERROR_INVALIDDATA;
+    if (buf_size < avctx->width*avctx->height / 64 / 4)
+        return AVERROR_INVALIDDATA;
 
     quality = buf[0];
     if (quality >= 100) {
-- 
2.17.1