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avcodec/vvc/ctu: Check ff_vvc_num_signalled_palette_entries

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Fixes: index 107 out of bounds for type 'uint16_t const[63]'
Fixes: 421336912/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VVC_fuzzer-6436225806565376

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2025-06-20 02:02:04 +02:00
parent 9d1e4feece
commit eb52251c0a
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1 changed files with 1 additions and 1 deletions
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libavcodec/vvc/ctu.c
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@ -1889,7 +1889,7 @@ static int palette_signaled(VVCLocalContext *lc, const bool local_dual_tree,
const int size = nb_predicted + nb_signaled;
const bool dual_tree_luma = local_dual_tree && cu->tree_type == DUAL_TREE_LUMA;
if (size > max_entries)
if (size > max_entries || nb_signaled < 0)
return AVERROR_INVALIDDATA;
for (int c = start; c < end; c++) {