Index: glibc-2.11.1/malloc/malloc.c
===================================================================
--- glibc-2.11.1.orig/malloc/malloc.c	2010-01-18 18:01:41.000000000 +0100
+++ glibc-2.11.1/malloc/malloc.c	2010-02-23 13:47:59.000000000 +0100
@@ -3933,9 +3933,10 @@ public_vALLOc(size_t bytes)
   if(!p) {
     /* Maybe the failure is due to running out of mmapped areas. */
     if(ar_ptr != &main_arena) {
-      (void)mutex_lock(&main_arena.mutex);
-      p = _int_memalign(&main_arena, pagesz, bytes);
-      (void)mutex_unlock(&main_arena.mutex);
+      ar_ptr = &main_arena;
+      (void)mutex_lock(&ar_ptr->mutex);
+      p = _int_memalign(ar_ptr, pagesz, bytes);
+      (void)mutex_unlock(&ar_ptr->mutex);
     } else {
 #if USE_ARENAS
       /* ... or sbrk() has failed and there is still a chance to mmap() */
@@ -3978,9 +3979,10 @@ public_pVALLOc(size_t bytes)
   if(!p) {
     /* Maybe the failure is due to running out of mmapped areas. */
     if(ar_ptr != &main_arena) {
-      (void)mutex_lock(&main_arena.mutex);
-      p = _int_memalign(&main_arena, pagesz, rounded_bytes);
-      (void)mutex_unlock(&main_arena.mutex);
+      ar_ptr = &main_arena;
+      (void)mutex_lock(&ar_ptr->mutex);
+      p = _int_memalign(ar_ptr, pagesz, rounded_bytes);
+      (void)mutex_unlock(&ar_ptr->mutex);
     } else {
 #if USE_ARENAS
       /* ... or sbrk() has failed and there is still a chance to mmap() */