gnu: fontconfig: Update to 2.12.1.

* gnu/packages/fontutils.scm (fontconfig): Update to 2.12.1.
(fontconfig/fixed): Remove variable.
* gnu/packages/patches/fontconfig-CVE-2016-5384.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

1 files changed, 0 insertions, 170 deletions

diff --git a/gnu/packages/patches/fontconfig-CVE-2016-5384.patch b/gnu/packages/patches/fontconfig-CVE-2016-5384.patch
deleted file mode 100644
index 617d5afbaf..0000000000
--- a/gnu/packages/patches/fontconfig-CVE-2016-5384.patch
+++ /dev/null
@@ -1,170 +0,0 @@
-Fix CVE-2016-5384 (double-free resulting in arbitrary code execution):
-
-<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5384>
-
-Copied from upstream code repository:
-
-<https://cgit.freedesktop.org/fontconfig/commit/?id=7a4a5bd7897d216f0794ca9dbce0a4a5c9d14940>
-
-From 7a4a5bd7897d216f0794ca9dbce0a4a5c9d14940 Mon Sep 17 00:00:00 2001
-From: Tobias Stoeckmann <tobias@stoeckmann.org>
-Date: Sat, 25 Jun 2016 19:18:53 +0200
-Subject: Properly validate offsets in cache files.
-
-The cache files are insufficiently validated. Even though the magic
-number at the beginning of the file as well as time stamps are checked,
-it is not verified if contained offsets are in legal ranges or are
-even pointers.
-
-The lack of validation allows an attacker to trigger arbitrary free()
-calls, which in turn allows double free attacks and therefore arbitrary
-code execution. Due to the conversion from offsets into pointers through
-macros, this even allows to circumvent ASLR protections.
-
-This attack vector allows privilege escalation when used with setuid
-binaries like fbterm. A user can create ~/.fonts or any other
-system-defined user-private font directory, run fc-cache and adjust
-cache files in ~/.cache/fontconfig. The execution of setuid binaries will
-scan these files and therefore are prone to attacks.
-
-If it's not about code execution, an endless loop can be created by
-letting linked lists become circular linked lists.
-
-This patch verifies that:
-
-- The file is not larger than the maximum addressable space, which
-  basically only affects 32 bit systems. This allows out of boundary
-  access into unallocated memory.
-- Offsets are always positive or zero
-- Offsets do not point outside file boundaries
-- No pointers are allowed in cache files, every "pointer or offset"
-  field must be an offset or NULL
-- Iterating linked lists must not take longer than the amount of elements
-  specified. A violation of this rule can break a possible endless loop.
-
-If one or more of these points are violated, the cache is recreated.
-This is current behaviour.
-
-Even though this patch fixes many issues, the use of mmap() shall be
-forbidden in setuid binaries. It is impossible to guarantee with these
-checks that a malicious user does not change cache files after
-verification. This should be handled in a different patch.
-
-Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
-
-diff --git a/src/fccache.c b/src/fccache.c
-index 71e8f03..02ec301 100644
---- a/src/fccache.c
-+++ b/src/fccache.c
-@@ -27,6 +27,7 @@
- #include <fcntl.h>
- #include <dirent.h>
- #include <string.h>
-+#include <limits.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <assert.h>
-@@ -587,6 +588,82 @@ FcCacheTimeValid (FcConfig *config, FcCache *cache, struct stat *dir_stat)
-     return cache->checksum == (int) dir_stat->st_mtime && fnano;
- }
- 
-+static FcBool
-+FcCacheOffsetsValid (FcCache *cache)
-+{
-+    char		*base = (char *)cache;
-+    char		*end = base + cache->size;
-+    intptr_t		*dirs;
-+    FcFontSet		*fs;
-+    int			 i, j;
-+
-+    if (cache->dir < 0 || cache->dir > cache->size - sizeof (intptr_t) ||
-+        memchr (base + cache->dir, '\0', cache->size - cache->dir) == NULL)
-+        return FcFalse;
-+
-+    if (cache->dirs < 0 || cache->dirs >= cache->size ||
-+        cache->dirs_count < 0 ||
-+        cache->dirs_count > (cache->size - cache->dirs) / sizeof (intptr_t))
-+        return FcFalse;
-+
-+    dirs = FcCacheDirs (cache);
-+    if (dirs)
-+    {
-+        for (i = 0; i < cache->dirs_count; i++)
-+        {
-+            FcChar8	*dir;
-+
-+            if (dirs[i] < 0 ||
-+                dirs[i] > end - (char *) dirs - sizeof (intptr_t))
-+                return FcFalse;
-+
-+            dir = FcOffsetToPtr (dirs, dirs[i], FcChar8);
-+            if (memchr (dir, '\0', end - (char *) dir) == NULL)
-+                return FcFalse;
-+         }
-+    }
-+
-+    if (cache->set < 0 || cache->set > cache->size - sizeof (FcFontSet))
-+        return FcFalse;
-+
-+    fs = FcCacheSet (cache);
-+    if (fs)
-+    {
-+        if (fs->nfont > (end - (char *) fs) / sizeof (FcPattern))
-+            return FcFalse;
-+
-+        if (fs->fonts != 0 && !FcIsEncodedOffset(fs->fonts))
-+            return FcFalse;
-+
-+        for (i = 0; i < fs->nfont; i++)
-+        {
-+            FcPattern		*font = FcFontSetFont (fs, i);
-+            FcPatternElt	*e;
-+            FcValueListPtr	 l;
-+
-+            if ((char *) font < base ||
-+                (char *) font > end - sizeof (FcFontSet) ||
-+                font->elts_offset < 0 ||
-+                font->elts_offset > end - (char *) font ||
-+                font->num > (end - (char *) font - font->elts_offset) / sizeof (FcPatternElt))
-+                return FcFalse;
-+
-+
-+            e = FcPatternElts(font);
-+            if (e->values != 0 && !FcIsEncodedOffset(e->values))
-+                return FcFalse;
-+
-+            for (j = font->num, l = FcPatternEltValues(e); j >= 0 && l; j--, l = FcValueListNext(l))
-+                if (l->next != NULL && !FcIsEncodedOffset(l->next))
-+                    break;
-+            if (j < 0)
-+                return FcFalse;
-+        }
-+    }
-+
-+    return FcTrue;
-+}
-+
- /*
-  * Map a cache file into memory
-  */
-@@ -596,7 +673,8 @@ FcDirCacheMapFd (FcConfig *config, int fd, struct stat *fd_stat, struct stat *di
-     FcCache	*cache;
-     FcBool	allocated = FcFalse;
- 
--    if (fd_stat->st_size < (int) sizeof (FcCache))
-+    if (fd_stat->st_size > INTPTR_MAX ||
-+        fd_stat->st_size < (int) sizeof (FcCache))
- 	return NULL;
-     cache = FcCacheFindByStat (fd_stat);
-     if (cache)
-@@ -652,6 +730,7 @@ FcDirCacheMapFd (FcConfig *config, int fd, struct stat *fd_stat, struct stat *di
-     if (cache->magic != FC_CACHE_MAGIC_MMAP ||
- 	cache->version < FC_CACHE_VERSION_NUMBER ||
- 	cache->size != (intptr_t) fd_stat->st_size ||
-+        !FcCacheOffsetsValid (cache) ||
- 	!FcCacheTimeValid (config, cache, dir_stat) ||
- 	!FcCacheInsert (cache, fd_stat))
-     {
--- 
-cgit v0.10.2
-