gnu: php: Fix test failure.

* gnu/packages/php.scm (php)[inputs]: Use gd-for-php.
(gd-for-php): New private variable.
* gnu/packages/patches/gd-CVE-2018-5711.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu/local.mk

@@ -681,6 +681,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/gcc-6-source-date-epoch-2.patch		\
   %D%/packages/patches/gcr-disable-failing-tests.patch		\
   %D%/packages/patches/gcr-fix-collection-tests-to-work-with-gpg-21.patch	\
+  %D%/packages/patches/gd-CVE-2018-5711.patch			\
   %D%/packages/patches/gd-fix-tests-on-i686.patch		\
   %D%/packages/patches/gd-freetype-test-failure.patch		\
   %D%/packages/patches/gegl-CVE-2012-4433.patch			\

gnu/packages/patches/gd-CVE-2018-5711.patch

@@ -0,0 +1,61 @@
+This patch is adapted from commit a11f47475e6443b7f32d21f2271f28f417e2ac04 and
+fixes CVE-2018-5711.
+
+From a11f47475e6443b7f32d21f2271f28f417e2ac04 Mon Sep 17 00:00:00 2001
+From: "Christoph M. Becker" <cmbecker69@gmx.de>
+Date: Wed, 29 Nov 2017 19:37:38 +0100
+Subject: [PATCH] Fix #420: Potential infinite loop in gdImageCreateFromGifCtx
+
+Due to a signedness confusion in `GetCode_` a corrupt GIF file can
+trigger an infinite loop.  Furthermore we make sure that a GIF without
+any palette entries is treated as invalid *after* open palette entries
+have been removed.
+
+CVE-2018-5711
+
+See also https://bugs.php.net/bug.php?id=75571.
+---
+ src/gd_gif_in.c             |  12 ++++++------
+ 1 file changed, 38 insertions(+), 6 deletions(-)
+
+diff --git a/src/gd_gif_in.c b/src/gd_gif_in.c
+index daf26e7..0a8bd71 100644
+--- a/src/gd_gif_in.c
++++ b/src/gd_gif_in.c
+@@ -335,11 +335,6 @@ terminated:
+ 		return 0;
+ 	}
+ 
+-	if(!im->colorsTotal) {
+-		gdImageDestroy(im);
+-		return 0;
+-	}
+-
+ 	/* Check for open colors at the end, so
+ 	 * we can reduce colorsTotal and ultimately
+ 	 * BitsPerPixel */
+@@ -351,6 +346,11 @@ terminated:
+ 		}
+ 	}
+ 
++	if(!im->colorsTotal) {
++		gdImageDestroy(im);
++		return 0;
++	}
++
+ 	return im;
+ }
+ 
+@@ -447,7 +447,7 @@ static int
+ GetCode_(gdIOCtx *fd, CODE_STATIC_DATA *scd, int code_size, int flag, int *ZeroDataBlockP)
+ {
+ 	int i, j, ret;
+-	unsigned char count;
++	int count;
+ 
+ 	if(flag) {
+ 		scd->curbit = 0;
+
+-- 
+2.13.6
+

gnu/packages/php.scm

@@ -50,6 +50,15 @@
   #:use-module (guix build-system gnu)
   #:use-module ((guix licenses) #:prefix license:))
 
+(define gd-for-php
+  (package
+    (inherit gd)
+    (source (origin
+             (inherit (package-source gd))
+             (patches (search-patches "gd-fix-tests-on-i686.patch"
+                                      "gd-freetype-test-failure.patch"
+                                      "gd-CVE-2018-5711.patch"))))))
+
 (define-public php
   (package
     (name "php")
@@ -278,11 +287,7 @@
                          "ext/mbstring/tests/mb_ereg_variation3.phpt"
                          "ext/mbstring/tests/mb_ereg_replace_variation1.phpt"
                          "ext/mbstring/tests/bug72994.phpt"
-                         "ext/ldap/tests/ldap_set_option_error.phpt"
-                         
-                         ;; XXX: This is CVE-2018-5711. There is no fix yet in libgd.
-                         ;; See https://github.com/libgd/libgd/issues/420
-                         "ext/gd/tests/bug75571.phpt"))
+                         "ext/ldap/tests/ldap_set_option_error.phpt"))
 
              ;; Skip tests requiring network access.
              (setenv "SKIP_ONLINE_TESTS" "1")
@@ -299,7 +304,7 @@
        ("curl" ,curl)
        ("cyrus-sasl" ,cyrus-sasl)
        ("freetype" ,freetype)
-       ("gd" ,gd)
+       ("gd" ,gd-for-php)
        ("gdbm" ,gdbm)
        ("glibc" ,glibc)
        ("gmp" ,gmp)