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avcodec/cbs_h265_syntax_template: Limit sps_num_palette_predictor_initializer_minus1 to 127

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Fixes: index 128 out of bounds for type 'uint16_t [128]'
Fixes: 38651/clusterfuzz-testcase-minimized-ffmpeg_BSF_HEVC_METADATA_fuzzer-6296416058736640

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-09-19 22:35:36 +02:00
parent 467c6a9146
commit 85413a5ae6
1 changed files with 1 additions and 1 deletions
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libavcodec/cbs_h265_syntax_template.c
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@ -728,7 +728,7 @@ static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
flag(sps_palette_predictor_initializer_present_flag);
if (current->sps_palette_predictor_initializer_present_flag) {
ue(sps_num_palette_predictor_initializer_minus1, 0, 128);
ue(sps_num_palette_predictor_initializer_minus1, 0, 127);
for (comp = 0; comp < (current->chroma_format_idc ? 3 : 1); comp++) {
int bit_depth = comp == 0 ? current->bit_depth_luma_minus8 + 8
: current->bit_depth_chroma_minus8 + 8;