From 1426291eb84c23eb0467c857397db8a76e77a003 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 21 Mar 2013 15:45:59 +0100
Subject: [PATCH] sonicdec: check decorrelation

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/sonic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index fe9f01f0be..ae7ca4c2b9 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -801,6 +801,10 @@ static av_cold int sonic_decode_init(AVCodecContext *avctx)
     if (!s->lossless)
         skip_bits(&gb, 3); // XXX FIXME
     s->decorrelation = get_bits(&gb, 2);
+    if (s->decorrelation != 3 && s->channels != 2) {
+        av_log(avctx, AV_LOG_ERROR, "invalid decorrelation %d\n", s->decorrelation);
+        return AVERROR_INVALIDDATA;
+    }
 
     s->downsampling = get_bits(&gb, 2);
     if (!s->downsampling) {