openwrt/toolchain/glibc/patches/2.15/050-all_glibc-2.14-leak-revert-crash.patch

partially revert commit 4bff6e0175ed195871f4e01cc4c4c33274b8f6e3 - caused segmentation faults in dlopen

References:
http://comments.gmane.org/gmane.comp.lib.glibc.user/1227
http://sourceware.org/ml/libc-alpha/2011-06/msg00006.html

diff --git a/libc/elf/dl-close.c b/libc/elf/dl-close.c
index 4b17bf8..733cc1b 100644
--- a/libc/elf/dl-close.c
+++ b/libc/elf/dl-close.c
@@ -119,17 +119,8 @@ _dl_close_worker (struct link_map *map)
   if (map->l_direct_opencount > 0 || map->l_type != lt_loaded
       || dl_close_state != not_pending)
     {
-      if (map->l_direct_opencount == 0)
-	{
-	  if (map->l_type == lt_loaded)
-	    dl_close_state = rerun;
-	  else if (map->l_type == lt_library)
-	    {
-	      struct link_map **oldp = map->l_initfini;
-	      map->l_initfini = map->l_orig_initfini;
-	      _dl_scope_free (oldp);
-	    }
-	}
+      if (map->l_direct_opencount == 0 && map->l_type == lt_loaded)
+	dl_close_state = rerun;
 
       /* There are still references to this object.  Do nothing more.  */
       if (__builtin_expect (GLRO_dl_debug_mask & DL_DEBUG_FILES, 0))
diff --git a/libc/elf/dl-deps.c b/libc/elf/dl-deps.c
index 51cb2fa..eddcbf0 100644
--- a/libc/elf/dl-deps.c
+++ b/libc/elf/dl-deps.c
@@ -489,6 +489,7 @@ _dl_map_object_deps (struct link_map *map,
 		  nneeded * sizeof needed[0]);
 	  atomic_write_barrier ();
 	  l->l_initfini = l_initfini;
+	  l->l_free_initfini = 1;
 	}
 
       /* If we have no auxiliary objects just go on to the next map.  */
@@ -689,6 +690,7 @@ Filters not supported with LD_TRACE_PRELINKING"));
   l_initfini[nlist] = NULL;
   atomic_write_barrier ();
   map->l_initfini = l_initfini;
+  map->l_free_initfini = 1;
   if (l_reldeps != NULL)
     {
       atomic_write_barrier ();
@@ -697,7 +699,7 @@ Filters not supported with LD_TRACE_PRELINKING"));
       _dl_scope_free (old_l_reldeps);
     }
   if (old_l_initfini != NULL)
-      map->l_orig_initfini = old_l_initfini;
+    _dl_scope_free (old_l_initfini);
 
   if (errno_reason)
     _dl_signal_error (errno_reason == -1 ? 0 : errno_reason, objname,
diff --git a/libc/elf/dl-libc.c b/libc/elf/dl-libc.c
index f44fa10..7563093 100644
--- a/libc/elf/dl-libc.c
+++ b/libc/elf/dl-libc.c
@@ -284,6 +284,10 @@ libc_freeres_fn (free_mem)
 	      if (! old->dont_free)
 		free (old);
 	    }
+
+	  /* Free the initfini dependency list.  */
+	  if (l->l_free_initfini)
+	    free (l->l_initfini);
 	}
 
       if (__builtin_expect (GL(dl_ns)[ns]._ns_global_scope_alloc, 0) != 0
diff --git a/libc/elf/rtld.c b/libc/elf/rtld.c
index b93a01f..2fc83ce 100644
--- a/libc/elf/rtld.c
+++ b/libc/elf/rtld.c
@@ -2277,6 +2277,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
 	      lnp->dont_free = 1;
 	      lnp = lnp->next;
 	    }
+	  l->l_free_initfini = 0;
 
 	  if (l != &GL(dl_rtld_map))
 	    _dl_relocate_object (l, l->l_scope, GLRO(dl_lazy) ? RTLD_LAZY : 0,
diff --git a/libc/include/link.h b/libc/include/link.h
index e877104..b1b4065 100644
--- a/libc/include/link.h
+++ b/libc/include/link.h
@@ -192,6 +192,9 @@ struct link_map
 						 during LD_TRACE_PRELINKING=1
 						 contains any DT_SYMBOLIC
 						 libraries.  */
+    unsigned int l_free_initfini:1; /* Nonzero if l_initfini can be
+				       freed, ie. not allocated with
+				       the dummy malloc in ld.so.  */
 
     /* Collected information about own RPATH directories.  */
     struct r_search_path_struct l_rpath_dirs;
@@ -240,9 +243,6 @@ struct link_map
 
     /* List of object in order of the init and fini calls.  */
     struct link_map **l_initfini;
-    /* The init and fini list generated at startup, saved when the
-       object is also loaded dynamically.  */
-    struct link_map **l_orig_initfini;
 
     /* List of the dependencies introduced through symbol binding.  */
     struct link_map_reldeps