gnu: libvpx: Add fix for CVE-2016-2818.

* gnu/packages/patches/libvpx-CVE-2016-2818.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/video.scm (libvpx)[source]: Add patch.

gnu/local.mk

@@ -606,6 +606,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libtiff-oob-write-in-nextdecode.patch	\
   %D%/packages/patches/libtool-skip-tests2.patch		\
   %D%/packages/patches/libunwind-CVE-2015-3239.patch		\
+  %D%/packages/patches/libvpx-CVE-2016-2818.patch		\
   %D%/packages/patches/libwmf-CAN-2004-0941.patch		\
   %D%/packages/patches/libwmf-CVE-2006-3376.patch		\
   %D%/packages/patches/libwmf-CVE-2007-0455.patch		\

gnu/packages/patches/libvpx-CVE-2016-2818.patch

@@ -0,0 +1,36 @@
+Patch contents copied from Mozilla esr45 changeset 312077:7ebfe49f001c
+
+  changeset:   312077:7ebfe49f001c
+  user:        Randell Jesup <rjesup@jesup.org>
+  Date:        Fri Apr 15 23:11:01 2016 -0400
+  summary:     Bug 1263384: validate input frames against configured resolution in vp8 r=rillian, a=ritu,lizzard
+
+  MozReview-Commit-ID: BxDCnJe0mzs
+
+--- libvpx-1.5.0/vp8/vp8_cx_iface.c.orig	2015-11-09 17:12:38.000000000 -0500
++++ libvpx-1.5.0/vp8/vp8_cx_iface.c	2016-06-08 08:48:46.037213092 -0400
+@@ -925,11 +925,19 @@
+         {
+             res = image2yuvconfig(img, &sd);
+ 
+-            if (vp8_receive_raw_frame(ctx->cpi, ctx->next_frame_flag | lib_flags,
+-                                      &sd, dst_time_stamp, dst_end_time_stamp))
+-            {
+-                VP8_COMP *cpi = (VP8_COMP *)ctx->cpi;
+-                res = update_error_state(ctx, &cpi->common.error);
++            if (sd.y_width != ctx->cfg.g_w || sd.y_height != ctx->cfg.g_h) {
++                /* from vp8_encoder.h for g_w/g_h:
++                   "Note that the frames passed as input to the encoder must have this resolution"
++                */
++                ctx->base.err_detail = "Invalid input frame resolution";
++                res = VPX_CODEC_INVALID_PARAM;
++            } else {
++                if (vp8_receive_raw_frame(ctx->cpi, ctx->next_frame_flag | lib_flags,
++                                          &sd, dst_time_stamp, dst_end_time_stamp))
++                {
++                    VP8_COMP *cpi = (VP8_COMP *)ctx->cpi;
++                    res = update_error_state(ctx, &cpi->common.error);
++                }
+             }
+ 
+             /* reset for next frame */

gnu/packages/video.scm

@@ -839,7 +839,8 @@ projects while introducing many more.")
                                   name "-" version ".tar.bz2"))
               (sha256
                (base32
-                "15v7qw0ydyxn08ksb6lxn1l51pxgpwgshdwd3275yrr5hs86fv9h"))))
+                "15v7qw0ydyxn08ksb6lxn1l51pxgpwgshdwd3275yrr5hs86fv9h"))
+              (patches (search-patches "libvpx-CVE-2016-2818.patch"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases