[FFmpeg-devel] [PATCH 1/3] avcodec/mpeg12dec: Check input size

[Michael Niedermayer]

Fixes: Timeout
Fixes: 53599/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IPU_fuzzer-4950102511058944

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/mpeg12dec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 914516bbd9..c93368e255 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -2969,6 +2969,9 @@ static int ipu_decode_frame(AVCodecContext *avctx, AVFrame *frame,
     GetBitContext *gb = &m->gb;
     int ret;
 
+    if (avpkt->size*8LL < (avctx->width+15)/16 * ((avctx->height+15)/16) * 2 * 7)
+        return AVERROR_INVALIDDATA;
+
     ret = ff_get_buffer(avctx, frame, 0);
     if (ret < 0)
         return ret;
-- 
2.17.1