From 8d77d12a2be10e8564599ccbfcdd804ff432d885 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Sun, 11 Sep 2011 12:40:40 -0400
Subject: dpcm: check to make sure channels is 1 or 2.

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

(limited to 'libavcodec/dpcm.c')

diff --git a/libavcodec/dpcm.c b/libavcodec/dpcm.c
index cb128affed..fc38abdb7a 100644
--- a/libavcodec/dpcm.c
+++ b/libavcodec/dpcm.c
@@ -117,6 +117,11 @@ static av_cold int dpcm_decode_init(AVCodecContext *avctx)
     int i;
     short square;
 
+    if (avctx->channels < 1 || avctx->channels > 2) {
+        av_log(avctx, AV_LOG_INFO, "invalid number of channels\n");
+        return AVERROR(EINVAL);
+    }
+
     s->channels = avctx->channels;
     s->sample[0] = s->sample[1] = 0;
 
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