From 20395189cd30d743eaaec0678373e0a9743b1c6b Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Wed, 14 Aug 2013 18:35:22 -0700
Subject: vp9_dx_iface: check for NULL/0-size input

avoids a crash caused by issue #585

Change-Id: I301595ee0227699b0da6f0dad6d870dd546e94ef
---
 vp9/vp9_dx_iface.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vp9/vp9_dx_iface.c b/vp9/vp9_dx_iface.c
index 05029b92e..66a3c2b93 100644
--- a/vp9/vp9_dx_iface.c
+++ b/vp9/vp9_dx_iface.c
@@ -368,6 +368,8 @@ static vpx_codec_err_t vp9_decode(vpx_codec_alg_priv_t  *ctx,
   uint32_t sizes[8];
   int frames_this_pts, frame_count = 0;
 
+  if (data == NULL || data_sz == 0) return VPX_CODEC_INVALID_PARAM;
+
   parse_superframe_index(data, data_sz, sizes, &frames_this_pts);
 
   do {
-- 
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