gnu: raptor2: Fix heap overflow bug.

* gnu/packages/patches/raptor2-heap-overflow.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/rdf.scm (raptor2): Use it.

gnu/local.mk

@@ -966,6 +966,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/qtscript-disable-tests.patch		\
   %D%/packages/patches/quickswitch-fix-dmenu-check.patch	\
   %D%/packages/patches/rapicorn-isnan.patch			\
+  %D%/packages/patches/raptor2-heap-overflow.patch		\
   %D%/packages/patches/ratpoison-shell.patch			\
   %D%/packages/patches/rcs-5.9.4-noreturn.patch			\
   %D%/packages/patches/readline-link-ncurses.patch		\

gnu/packages/patches/raptor2-heap-overflow.patch

@@ -0,0 +1,51 @@
+This patch addresses two heap overflow bugs in raptor2:
+
+http://seclists.org/oss-sec/2017/q2/424
+
+Patch copied from libreoffice:
+
+https://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1
+
+From 590681e546cd9aa18d57dc2ea1858cb734a3863f Mon Sep 17 00:00:00 2001
+From: Dave Beckett <dave@dajobe.org>
+Date: Sun, 16 Apr 2017 23:15:12 +0100
+Subject: [PATCH] Calcualte max nspace declarations correctly for XML writer
+
+(raptor_xml_writer_start_element_common): Calculate max including for
+each attribute a potential name and value.
+
+Fixes Issues #0000617 http://bugs.librdf.org/mantis/view.php?id=617
+and #0000618 http://bugs.librdf.org/mantis/view.php?id=618
+---
+ src/raptor_xml_writer.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/src/raptor_xml_writer.c b/src/raptor_xml_writer.c
+index 693b946..0d3a36a 100644
+--- a/src/raptor_xml_writer.c
++++ b/src/raptor_xml_writer.c
+@@ -181,9 +181,10 @@ raptor_xml_writer_start_element_common(raptor_xml_writer* xml_writer,
+   size_t nspace_declarations_count = 0;  
+   unsigned int i;
+ 
+-  /* max is 1 per element and 1 for each attribute + size of declared */
+   if(nstack) {
+-    int nspace_max_count = element->attribute_count+1;
++    int nspace_max_count = element->attribute_count * 2; /* attr and value */
++    if(element->name->nspace)
++      nspace_max_count++;
+     if(element->declared_nspaces)
+       nspace_max_count += raptor_sequence_size(element->declared_nspaces);
+     if(element->xml_language)
+@@ -237,7 +238,7 @@ raptor_xml_writer_start_element_common(raptor_xml_writer* xml_writer,
+         }
+       }
+ 
+-      /* Add the attribute + value */
++      /* Add the attribute's value */
+       nspace_declarations[nspace_declarations_count].declaration=
+         raptor_qname_format_as_xml(element->attributes[i],
+                                    &nspace_declarations[nspace_declarations_count].length);
+-- 
+2.9.3
+

gnu/packages/rdf.scm

@@ -53,6 +53,8 @@
              (method url-fetch)
              (uri (string-append "http://download.librdf.org/source/" name
                                  "-" version ".tar.gz"))
+             (patches
+              (search-patches "raptor2-heap-overflow.patch"))
              (sha256
               (base32
                "1vc02im4mpc28zxzgli68k6j0dakh0k3s389bm436yvqajxg19xd"))))