From 4e145f1dcdcbe19e8f8e98940dab04e9332a8b5b Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 3 Jul 2022 00:34:08 +0200
Subject: [PATCH] avcodec/mss4: Check image size with av_image_check_size2()

Fixes: Timeout
Fixes: 48418/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MTS2_fuzzer-4834851466903552

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/mss4.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/mss4.c b/libavcodec/mss4.c
index d446e78d97..53b7910097 100644
--- a/libavcodec/mss4.c
+++ b/libavcodec/mss4.c
@@ -26,6 +26,7 @@
  */
 
 #include "libavutil/thread.h"
+#include "libavutil/imgutils.h"
 
 #include "avcodec.h"
 #include "bytestream.h"
@@ -477,6 +478,9 @@ static int mss4_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
                width, height);
         return AVERROR_INVALIDDATA;
     }
+    if (av_image_check_size2(width, height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0)
+        return AVERROR_INVALIDDATA;
+
     if (quality < 1 || quality > 100) {
         av_log(avctx, AV_LOG_ERROR, "Invalid quality setting %d\n", quality);
         return AVERROR_INVALIDDATA;