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avcodec/cbs_h266_syntax_template: Check tile_y 

Fixes: out of array access
Fixes: 67021/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4883576579489792

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 57f252b2d1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-03-21 02:15:16 +01:00
parent 24367ad563
commit a2ceca5cf6
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1 changed files with 2 additions and 0 deletions
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libavcodec/cbs_h266_syntax_template.c
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@ -2072,6 +2072,8 @@ static int FUNC(pps) (CodedBitstreamContext *ctx, RWContext *rw,
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;
ctu_x = 0, ctu_y = 0;
for (j = 0; j < tile_x; j++) {