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Avoid a deadlock when decoding wma.

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Fixes ticket #2925.
(cherry picked from commit ec8a4841f7e81040f9a2757f23e70dff5e6b33a4)
This commit is contained in:
Carl Eugen Hoyos 2013-09-02 08:32:24 +02:00
parent d3ef17740d
commit a5ef62ede1
1 changed files with 4 additions and 0 deletions
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4
libavcodec/wmadec.c
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@ -529,6 +529,10 @@ static int wma_decode_block(WMACodecContext *s)
coef escape coding */
total_gain = 1;
for(;;) {
if (get_bits_left(&s->gb) < 7) {
av_log(s->avctx, AV_LOG_ERROR, "total_gain overread\n");
return AVERROR_INVALIDDATA;
}
a = get_bits(&s->gb, 7);
total_gain += a;
if (a != 127)