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avcodec/pixlet: check out of bounds pfx value 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-12-23 09:41:06 +01:00
parent 41de965e31
commit 51ed1a7dd4
1 changed files with 2 additions and 0 deletions
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2
libavcodec/pixlet.c
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@ -267,6 +267,8 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i
escape = av_mod_uintp2(16383, pfx);
cnt1 = get_unary(b, 0, 8);
if (cnt1 < 8) {
if (pfx < 1 || pfx > 25)
return AVERROR_INVALIDDATA;
value = show_bits(b, pfx);
if (value > 1) {
skip_bits(b, pfx);