From 4865d66b76f7bb85b837bcadb9f9d7b7337f137a Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Mon, 11 Jan 2016 18:58:08 +0100
Subject: [PATCH] avcodec/wavpackenc: Check the number of channels

They are stored in a byte, thus more than 255 is not possible

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 59c915a403af32c4ff5126625b0cc7e38f4beff9)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/wavpackenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/wavpackenc.c b/libavcodec/wavpackenc.c
index ecc4a2eea2..2d98e53b95 100644
--- a/libavcodec/wavpackenc.c
+++ b/libavcodec/wavpackenc.c
@@ -128,6 +128,11 @@ static av_cold int wavpack_encode_init(AVCodecContext *avctx)
 
     s->avctx = avctx;
 
+    if (avctx->channels > 255) {
+        av_log(avctx, AV_LOG_ERROR, "Too many channels\n", avctx->channels);
+        return AVERROR(EINVAL);
+    }
+
     if (!avctx->frame_size) {
         int block_samples;
         if (!(avctx->sample_rate & 1))