Fixes: Timeout
Fixes: 
52566/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOBICLIP_fuzzer-4913160050311168

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavcodec/mobiclip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/mobiclip.c b/libavcodec/mobiclip.c
index aca462428c..c3b2383dbc 100644
--- a/libavcodec/mobiclip.c
+++ b/libavcodec/mobiclip.c
@@ -1216,6 +1216,9 @@ static int mobiclip_decode(AVCodecContext *avctx, AVFrame 
*rframe,
     AVFrame *frame = s->pic[s->current_pic];
     int ret;
 
+    if (avctx->height/16 * (avctx->width/16) * 2 > 8LL*FFALIGN(pkt->size, 2))
+        return AVERROR_INVALIDDATA;
+
     av_fast_padded_malloc(&s->bitstream, &s->bitstream_size,
                           pkt->size);
 
-- 
2.17.1

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