avcodec/mpeg4videodec: Clear partitioned frame in decode_studio_vop_header()
partitioned_frame is also set/cleared in decode_vop_header()
Fixes: out of array read
Fixes: 9789/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5638681627983872
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 074187d599
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
@@ -3056,6 +3056,7 @@ static int decode_studio_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
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if (get_bits_left(gb) <= 32)
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if (get_bits_left(gb) <= 32)
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return 0;
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return 0;
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s->partitioned_frame = 0;
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s->decode_mb = mpeg4_decode_studio_mb;
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s->decode_mb = mpeg4_decode_studio_mb;
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decode_smpte_tc(ctx, gb);
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decode_smpte_tc(ctx, gb);
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