From fbc05949ef52c8a8d69233eed77f6636dffec280 Mon Sep 17 00:00:00 2001
From: Akira TAGOH <akira@tagoh.org>
Date: Wed, 26 Feb 2020 15:42:21 +0900
Subject: [PATCH] Fix assertion in FcFini()

Due to the unproper initialization of `latest_mtime', the duplicate caches
was still in fcCacheChains with no references. which means no one frees
them. thus, the memory leak was happened.

Fixes https://gitlab.freedesktop.org/fontconfig/fontconfig/issues/227
---
 src/fccache.c | 9 +++++----
 src/fcinit.c  | 4 ++--
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/fccache.c b/src/fccache.c
index 4744a84..035458e 100644
--- a/src/fccache.c
+++ b/src/fccache.c
@@ -365,7 +365,6 @@ FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
     struct stat file_stat, dir_stat;
     FcBool	ret = FcFalse;
     const FcChar8 *sysroot = FcConfigGetSysRoot (config);
-    struct timeval latest_mtime = (struct timeval){ 0 };
 
     if (sysroot)
 	d = FcStrBuildFilename (sysroot, dir, NULL);
@@ -390,6 +389,8 @@ FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
 #ifndef _WIN32
 	FcBool retried = FcFalse;
 #endif
+	struct timeval latest_mtime = (struct timeval){ 0 };
+
 	if (sysroot)
 	    cache_hashed = FcStrBuildFilename (sysroot, cache_dir, cache_base, NULL);
 	else
@@ -1081,12 +1082,12 @@ FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat)
 
     if (!file_stat)
 	file_stat = &my_file_stat;
-    fd = FcDirCacheOpenFile (cache_file, file_stat);
-    if (fd < 0)
-	return NULL;
     config = FcConfigReference (NULL);
     if (!config)
 	return NULL;
+    fd = FcDirCacheOpenFile (cache_file, file_stat);
+    if (fd < 0)
+	return NULL;
     cache = FcDirCacheMapFd (config, fd, file_stat, NULL);
     FcConfigDestroy (config);
     close (fd);
diff --git a/src/fcinit.c b/src/fcinit.c
index 6f82ebd..0e1421e 100644
--- a/src/fcinit.c
+++ b/src/fcinit.c
@@ -199,10 +199,10 @@ void
 FcFini (void)
 {
     FcConfigFini ();
-    FcCacheFini ();
+    FcConfigPathFini ();
     FcDefaultFini ();
     FcObjectFini ();
-    FcConfigPathFini ();
+    FcCacheFini ();
 }
 
 /*
-- 
2.24.1

From 6f6b39780215714386606ca1c5457a7106639ff4 Mon Sep 17 00:00:00 2001
From: Akira TAGOH <akira@tagoh.org>
Date: Mon, 23 Mar 2020 14:03:47 +0900
Subject: [PATCH] Fix assertion in FcCacheFini() again

The previous fix in fbc05949ef52c8a8d69233eed77f6636dffec280 was wrong. reverting.

When reading older caches, FcDirCacheMapHelper() returns FcFalse and
it became the return value from FcDirCacheProcess() too, which is wrong.
Actually one of calls for FcDirCacheMapHelper() should be successfully
finished and closure should have a valid pointer for cache.

Due to this, the proper finalization process wasn't running against
cache in closure.

Fixes https://gitlab.freedesktop.org/fontconfig/fontconfig/issues/227
---
 src/fccache.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/fccache.c b/src/fccache.c
index 035458e..2d398c7 100644
--- a/src/fccache.c
+++ b/src/fccache.c
@@ -365,6 +365,7 @@ FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
     struct stat file_stat, dir_stat;
     FcBool	ret = FcFalse;
     const FcChar8 *sysroot = FcConfigGetSysRoot (config);
+    struct timeval latest_mtime = (struct timeval){ 0 };
 
     if (sysroot)
 	d = FcStrBuildFilename (sysroot, dir, NULL);
@@ -389,7 +390,6 @@ FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
 #ifndef _WIN32
 	FcBool retried = FcFalse;
 #endif
-	struct timeval latest_mtime = (struct timeval){ 0 };
 
 	if (sysroot)
 	    cache_hashed = FcStrBuildFilename (sysroot, cache_dir, cache_base, NULL);
@@ -445,6 +445,8 @@ FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
     }
     FcStrListDone (list);
 
+    if (closure)
+	return !!(*((FcCache **)closure) != NULL);
     return ret;
 }
 
@@ -792,7 +794,18 @@ FcCacheFini (void)
     int		    i;
 
     for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
-	assert (fcCacheChains[i] == NULL);
+    {
+	if (FcDebug() & FC_DBG_CACHE)
+	{
+	    if (fcCacheChains[i] != NULL)
+	    {
+		FcCacheSkip *s = fcCacheChains[i];
+		printf("Fontconfig error: not freed %p (dir: %s, refcount %d)\n", s->cache, FcCacheDir(s->cache), s->ref.count);
+	    }
+	}
+	else
+	    assert (fcCacheChains[i] == NULL);
+    }
     assert (fcCacheMaxLevel == 0);
 
     free_lock ();
-- 
2.24.1