mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/ffv1dec: Check for 0 quant tables
Fixes assertion failure
Fixes: 07ec1fc3c1cbf2d3edcd7d9b52ca156c/asan_heap-oob_13624c5_491_ecd4720a03e697ba750b235690656c8f.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5745cf799a
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@ -533,7 +533,7 @@ static int read_extra_header(FFV1Context *f)
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f->quant_table_count = get_symbol(c, state, 0);
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f->quant_table_count = get_symbol(c, state, 0);
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if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
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if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count)
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return AVERROR_INVALIDDATA;
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return AVERROR_INVALIDDATA;
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for (i = 0; i < f->quant_table_count; i++) {
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for (i = 0; i < f->quant_table_count; i++) {
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