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Add a check to vp6_parse_coeff_huffman to ensure it does not overread the input buffer.

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Originally committed as revision 19349 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-07-05 16:01:51 +00:00
parent 7576516a7e
commit ad92108694
1 changed files with 2 additions and 0 deletions
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2
libavcodec/vp6.c
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@ -372,6 +372,8 @@ static void vp6_parse_coeff_huffman(VP56Context *s)
if (coeff_idx) if (coeff_idx)
break; break;
} else { } else {
if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
return;
coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3); coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
if (coeff == 0) { if (coeff == 0) {
if (coeff_idx) { if (coeff_idx) {