mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/diracdec: Tighter checks on CODEBLOCKS_X/Y
Fixes very long but finite loop Fixes: asan_heap-oob_107866c_42_041.drc Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -1004,8 +1004,8 @@ static int dirac_unpack_idwt_params(DiracContext *s)
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/* Codeblock parameters (core syntax only) */
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if (get_bits1(gb)) {
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for (i = 0; i <= s->wavelet_depth; i++) {
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CHECKEDREAD(s->codeblock[i].width , tmp < 1, "codeblock width invalid\n")
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CHECKEDREAD(s->codeblock[i].height, tmp < 1, "codeblock height invalid\n")
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CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
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CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
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}
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CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
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