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avcodec/cbs_h266_syntax_template: Check tile_y

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Fixes: invalid state leading to out of array access
Fixes: 490615782/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VVC_fuzzer-4711353817563136

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-03-14 00:50:17 +01:00
parent e33573813d
commit 12303cd922
1 changed files with 2 additions and 0 deletions
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libavcodec/cbs_h266_syntax_template.c
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@@ -1971,6 +1971,8 @@ static int FUNC(pps) (CodedBitstreamContext *ctx, RWContext *rw,
current->slice_top_left_tile_idx[i] = tile_idx;
tile_x = tile_idx % current->num_tile_columns;
tile_y = tile_idx / current->num_tile_columns;
if (tile_y >= current->num_tile_rows)
return AVERROR_INVALIDDATA;
if (tile_x != current->num_tile_columns - 1) {
ues(pps_slice_width_in_tiles_minus1[i],
0, current->num_tile_columns - 1 - tile_x, 1, i);