Update code comment to clarify that the only element whose layout is
not randomized is a proper C99 flexible-array member. This update is
complementary to commit 1ee60356c2dc ("gcc-plugins: randstruct: Only
warn about true flexible arrays")

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 scripts/gcc-plugins/randomize_layout_plugin.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c
index 910bd21d08f4..746ff2d272f2 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -339,8 +339,7 @@ static int relayout_struct(tree type)
 
 	/*
 	 * enforce that we don't randomize the layout of the last
-	 * element of a struct if it's a 0 or 1-length array
-	 * or a proper flexible array
+	 * element of a struct if it's a proper flexible array
 	 */
 	if (is_flexible_array(newtree[num_fields - 1])) {
 		has_flexarray = true;
-- 
2.34.1

On Sat, 25 Nov 2023 15:49:12 -0600, Gustavo A. R. Silva wrote:
> Update code comment to clarify that the only element whose layout is
> not randomized is a proper C99 flexible-array member. This update is
> complementary to commit 1ee60356c2dc ("gcc-plugins: randstruct: Only
> warn about true flexible arrays")
> 
> 

Applied to for-linus/hardening, thanks!

[1/1] gcc-plugins: randstruct: Update code comment in relayout_struct()
      https://git.kernel.org/kees/c/d71f22365a9c

Take care,

-- 
Kees Cook