--- common/lib/modules/fglrx/build_mod/2.6.x/Makefile
+++ common/lib/modules/fglrx/build_mod/2.6.x/Makefile
@@ -67,6 +67,7 @@ EXTRA_CFLAGS    += \
                 -DFGL_LINUX253P1_VMA_API \
                 -DPAGE_ATTR_FIX=$(PAGE_ATTR_FIX) \
 
+	EXTRA_CFLAGS +=-DARCH_COMPAT_ALLOC_USER_SPACE
 ifeq ($(KERNELRELEASE),)
 # on first call from remote location we get into this path
 # whilst on second call all is managed by the embedding kernel makefile
--- common/lib/modules/fglrx/build_mod/kcl_ioctl.c
+++ common/lib/modules/fglrx/build_mod/kcl_ioctl.c
@@ -193,7 +193,19 @@
  */
 void* ATI_API_CALL KCL_IOCTL_AllocUserSpace32(long size)
 {
-    return compat_alloc_user_space(size);
+  void __user *ptr;
+  
+  /* If len occupies more than half of the entire compat space... */
+  if (unlikely(((unsigned long) size) > (((compat_uptr_t)~0) >> 1)))
+    return NULL;
+  
+  ptr = arch_compat_alloc_user_space(size);
+  
+  
+  if (unlikely(!access_ok(VERIFY_WRITE, ptr, size)))
+    return NULL;
+  
+  return ptr;
 }
 
 #endif // __x86_64__