[FFmpeg-devel] [PATCH 2/2] Check for out of bound bands limit in mpc v8 decoder.
fenrir at elivagar.org
fenrir at elivagar.org
Sun Sep 25 13:43:38 CEST 2011
From: Laurent Aimar <fenrir at videolan.org>
---
libavcodec/mpc8.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/libavcodec/mpc8.c b/libavcodec/mpc8.c
index cae7244..436d7ba 100644
--- a/libavcodec/mpc8.c
+++ b/libavcodec/mpc8.c
@@ -127,6 +127,8 @@ static av_cold int mpc8_decode_init(AVCodecContext * avctx)
skip_bits(&gb, 3);//sample rate
c->maxbands = get_bits(&gb, 5) + 1;
+ if (c->maxbands >= BANDS)
+ return AVERROR_INVALIDDATA;
channels = get_bits(&gb, 4) + 1;
if (channels > 2) {
av_log_missing_feature(avctx, "Multichannel MPC SV8", 1);
@@ -260,6 +262,8 @@ static int mpc8_decode_frame(AVCodecContext * avctx,
maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2);
if(maxband > 32) maxband -= 33;
}
+ if(maxband > c->maxbands)
+ return AVERROR_INVALIDDATA;
c->last_max_band = maxband;
/* read subband indexes */
--
1.7.2.5
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