From 1848a0f239118b59444dfb1457fb472d997ff274 Mon Sep 17 00:00:00 2001
From: Mirko Vogt <mirko@openwrt.org>
Date: Mon, 24 Jun 2013 14:51:22 +0000
Subject: [PATCH] add patch for eglibc version 2.15
This patch partially reverts an (e)glibc commit
which fixed a memory leak, however introduced lookup
errors in dlopen() with resulting segmentation faults
in certain scenarios.
References:
- http://comments.gmane.org/gmane.comp.lib.glibc.user/1227
- http://sourceware.org/ml/libc-alpha/2011-06/msg00006.html
SVN-Revision: 37029
---
...050-all_glibc-2.14-leak-revert-crash.patch | 110 ++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 toolchain/eglibc/patches/2.15/050-all_glibc-2.14-leak-revert-crash.patch
diff --git a/toolchain/eglibc/patches/2.15/050-all_glibc-2.14-leak-revert-crash.patch b/toolchain/eglibc/patches/2.15/050-all_glibc-2.14-leak-revert-crash.patch
new file mode 100644
index 0000000000..d1e19aa448
--- /dev/null
+++ b/toolchain/eglibc/patches/2.15/050-all_glibc-2.14-leak-revert-crash.patch
@@ -0,0 +1,110 @@
+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
--
GitLab