Fixes: Timeout
Fixes: 
28551/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6229183210586112

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavformat/mpc8.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c
index 447a8d4fdf..ff7da2ef55 100644
--- a/libavformat/mpc8.c
+++ b/libavformat/mpc8.c
@@ -292,7 +292,7 @@ static int mpc8_read_packet(AVFormatContext *s, AVPacket 
*pkt)
             return AVERROR_EOF;
 
         mpc8_get_chunk_header(s->pb, &tag, &size);
-        if (size < 0)
+        if (size < 0 || size > INT_MAX)
             return -1;
         if(tag == TAG_AUDIOPACKET){
             if ((ret = av_get_packet(s->pb, pkt, size)) < 0)
-- 
2.17.1

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