From 22f893e1c9f9387f0a021f775757130fa48e0180 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Wed, 23 Feb 2011 13:11:05 -0500
Subject: vmdaudio: validate block type

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
---
 libavcodec/vmdav.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libavcodec')

diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c
index a528d91190..b338da3904 100644
--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -518,6 +518,10 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
         return buf_size;
 
     block_type = buf[6];
+    if (block_type < BLOCK_TYPE_AUDIO || block_type > BLOCK_TYPE_SILENCE) {
+        av_log(avctx, AV_LOG_ERROR, "unknown block type: %d\n", block_type);
+        return AVERROR(EINVAL);
+    }
 
     if (block_type == BLOCK_TYPE_AUDIO) {
         /* the chunk contains audio */
-- 
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