diff -urN libvpx-1.5.0-orig/vp8/vp8_dx_iface.c libvpx-1.5.0/vp8/vp8_dx_iface.c
--- libvpx-1.5.0-orig/vp8/vp8_dx_iface.c	2015-11-10 07:12:38 +0900
+++ libvpx-1.5.0/vp8/vp8_dx_iface.c	2015-12-23 23:58:21 +0900
@@ -67,10 +67,13 @@
     FRAGMENT_DATA           fragments;
 };
 
-static void vp8_init_ctx(vpx_codec_ctx_t *ctx)
+static int vp8_init_ctx(vpx_codec_ctx_t *ctx)
 {
     vpx_codec_alg_priv_t *priv =
         (vpx_codec_alg_priv_t *)vpx_calloc(1, sizeof(*priv));
+    if (!priv) {
+        return 0;
+    }
 
     ctx->priv = (vpx_codec_priv_t *)priv;
     ctx->priv->init_flags = ctx->init_flags;
@@ -85,6 +88,8 @@
         priv->cfg = *ctx->config.dec;
         ctx->config.dec = &priv->cfg;
     }
+
+    return 1;
 }
 
 static vpx_codec_err_t vp8_init(vpx_codec_ctx_t *ctx,
@@ -103,7 +108,9 @@
      * information becomes known.
      */
     if (!ctx->priv) {
-      vp8_init_ctx(ctx);
+      if (!vp8_init_ctx(ctx)) {
+         return VPX_CODEC_MEM_ERROR;
+      }
       priv = (vpx_codec_alg_priv_t *)ctx->priv;
 
       /* initialize number of fragments to zero */
@@ -379,7 +386,9 @@
        }
 
        res = vp8_create_decoder_instances(&ctx->yv12_frame_buffers, &oxcf);
-       ctx->decoder_init = 1;
+       if (!res) {
+         ctx->decoder_init = 1;
+       }
     }
 
     /* Set these even if already initialized.  The caller may have changed the