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qdm2: Check data block size for bytes to bits overflow.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

CC: libav-stable@libav.org
This commit is contained in:
Alex Converse
2012-01-25 15:27:11 -08:00
parent 62271c4c9a
commit dac56d9ce0
1 changed files with 4 additions and 0 deletions
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4
libavcodec/qdm2.c
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@@ -1819,6 +1819,10 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
extradata += 4;
s->checksum_size = AV_RB32(extradata);
if (s->checksum_size >= 1U << 28) {
av_log(avctx, AV_LOG_ERROR, "data block size too large (%u)\n", s->checksum_size);
return AVERROR_INVALIDDATA;
}
s->fft_order = av_log2(s->fft_size) + 1;
s->fft_frame_size = 2 * s->fft_size; // complex has two floats