Fixes: out of array read
Fixes: 
25453/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOBICLIP_fuzzer-5163575973511168

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 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mobiclip.c b/libavcodec/mobiclip.c
index 3ede370bef..08a35218cc 100644
--- a/libavcodec/mobiclip.c
+++ b/libavcodec/mobiclip.c
@@ -1306,7 +1306,7 @@ static int mobiclip_decode(AVCodecContext *avctx, void 
*data,
                         (uint16_t *)pkt->data,
                         (pkt->size + 1) >> 1);
 
-    ret = init_get_bits8(gb, s->bitstream, s->bitstream_size);
+    ret = init_get_bits8(gb, s->bitstream, FFALIGN(pkt->size, 2));
     if (ret < 0)
         return ret;
 
-- 
2.17.1

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