[PATCH v2 05/20] randstruct: Whitelist struct security_hook_heads cast

[Kees Cook]

The LSM initialization routines walk security_hook_heads as an array
of struct list_head instead of via names to avoid a ton of needless
source. Whitelist this to avoid the false positive warning from the
plugin:

security/security.c: In function âsecurity_initâ:
security/security.c:59:20: note: found mismatched op0 struct pointer types: âstruct list_headâ and âstruct security_hook_headsâ

  struct list_head *list = (struct list_head *) &security_hook_heads;
                    ^

Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: James Morris <james.l.morris@xxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
 scripts/gcc-plugins/randomize_layout_plugin.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c
index bccbec2af0e4..e126ac7874af 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -43,6 +43,8 @@ struct whitelist_entry {
 };
 
 static const struct whitelist_entry whitelist[] = {
+	/* walk struct security_hook_heads as an array of struct list_head */
+	{ "security/security.c", "list_head", "security_hook_heads" },
 	{ }
 };
 
-- 
2.7.4