From bff5b2c1ca1290ea30587ff2f76171f9e3854872 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Fri, 14 Oct 2011 00:24:50 -0400
Subject: [PATCH] atrac1: validate number of channels

---
 libavcodec/atrac1.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/atrac1.c b/libavcodec/atrac1.c
index 4647e0c351..1ba580cbac 100644
--- a/libavcodec/atrac1.c
+++ b/libavcodec/atrac1.c
@@ -332,6 +332,11 @@ static av_cold int atrac1_decode_init(AVCodecContext *avctx)
 
     avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
 
+    if (avctx->channels < 1 || avctx->channels > AT1_MAX_CHANNELS) {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %d\n",
+               avctx->channels);
+        return AVERROR(EINVAL);
+    }
     q->channels = avctx->channels;
 
     /* Init the mdct transforms */