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vorbisdec: Check bark_map_size.

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This fixes potential divisions by zero and out of array accesses.

Reported-by: Dale Curtis <dalecurtis@chromium.org>
Found-by: inferno@chromium.org
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-11 00:54:12 +01:00
parent 7e5c5fa5fc
commit 2c16bf2de0
1 changed files with 4 additions and 0 deletions
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4
libavcodec/vorbisdec.c
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@ -597,6 +597,10 @@ static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
"Floor 0 amplitude bits is 0.\n");
return AVERROR_INVALIDDATA;
}
if (floor_setup->data.t0.bark_map_size == 0) {
av_log(vc->avccontext, AV_LOG_ERROR, "Floor 0 bark map size is 0.\n");
return AVERROR_INVALIDDATA;
}
floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;