fbdev: mmp: Annotate struct mmphw_ctrl with __counted_by

Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct mmphw_ctrl.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Kees Cook 2023-09-22 10:51:37 -07:00 committed by Helge Deller
parent ce9ecca023
commit 053d7dcd34

View File

@ -1406,7 +1406,7 @@ struct mmphw_ctrl {
/*pathes*/
int path_num;
struct mmphw_path_plat path_plats[];
struct mmphw_path_plat path_plats[] __counted_by(path_num);
};
static inline int overlay_is_vid(struct mmp_overlay *overlay)