diff -r 59656cd16411 -r b9a6af0ae41a src/server/daemon/config.c
--- a/src/server/daemon/config.c	Mon Apr 06 16:36:25 2015 +0200
+++ b/src/server/daemon/config.c	Fri Oct 16 19:23:49 2015 +0200
@@ -38,6 +38,7 @@
 #include <sys/mman.h>
 
 #include <ucx/string.h>
+#include <ucx/utils.h>
 
 #include "httplistener.h"
 #include "config.h"
@@ -301,14 +302,9 @@
     }
     
     // mime file
-    sstr_t mf = cfg_directivelist_get_str(obj->directives, sstr("MimeFile"));
-    
-    sstr_t base = sstr("config/");
-    sstr_t file;
-    file.length = base.length + mf.length;
-    file.ptr = alloca(file.length + 1);
-    file.ptr[file.length] = 0;
-    file = sstrncat(file, 2, base, mf);
+    sstr_t mf = cfg_directivelist_get_str(obj->directives, sstr("MimeFile"));  
+    sstr_t base = sstr("config/"); 
+    sstr_t file = sstrcat(2, base, mf);
     
     ConfigFile *f = cfgmgr_get_file(file);
     if(f == NULL) {
@@ -323,6 +319,8 @@
         if(cfgmgr_reload_file(f, cfg, NULL)) {
             free(f->file.ptr);
             free(f);
+            
+            free(file.ptr);
             return -1;
         }
         cfgmgr_attach_file(f);
@@ -330,6 +328,7 @@
     
     cfg->mimetypes = f->data;
     
+    free(file.ptr);
     return 0;
 }
 
@@ -606,11 +605,8 @@
     
     // load the object config file
     sstr_t base = sstr("config/");
-    sstr_t file;
-    file.length = base.length + objfile.length + 1;
-    file.ptr = alloca(file.length);
-    file.ptr[file.length] = 0;
-    file = sstrncat(file, 2, base, objfile);
+    sstr_t file = sstrcat(2, base, objfile);
+    file = sstrcat(2, base, objfile);
 
     // the file is managed by the configuration manager
     ConfigFile *f = cfgmgr_get_file(file);
@@ -624,18 +620,19 @@
         if(cfgmgr_reload_file(f, cfg, NULL)) {
             free(f->file.ptr);
             free(f);
+            
+            free(file.ptr);
             return -1;
         }
         cfgmgr_attach_file(f);
     }
     vs->objectfile = sstrdup(file);
     vs->objects = (HTTPObjectConfig*)f->data;
+    free(file.ptr);
+    
     
     // load acl config file
-    file.length = base.length + aclfile.length + 1;
-    file.ptr = alloca(file.length);
-    file.ptr[file.length] = 0;
-    file = sstrncat(file, 2, base, aclfile);
+    file = sstrcat(2, base, aclfile);
     
     ConfigFile *aclf = cfgmgr_get_file(file);
     if(aclf == NULL) {
@@ -648,11 +645,14 @@
         if(cfgmgr_reload_file(aclf, cfg, NULL)) {
             free(aclf->file.ptr);
             free(aclf);
+            
+            free(file.ptr);
             return -1;
         }
         cfgmgr_attach_file(aclf);
     }
     vs->acls = aclf->data;
+    free(file.ptr);
     
     // set the access log for the virtual server
     // TODO: don't use always the default