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 uniphier_pinctrl_reg_region. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Linus Walleij <linus.wall...@linaro.org> Cc: Kunihiko Hayashi <hayashi.kunih...@socionext.com> Cc: Masami Hiramatsu <mhira...@kernel.org> Cc: linux-g...@vger.kernel.org Cc: linux-arm-ker...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c index 18d3a4f69e63..fbd0fcdb42c8 100644 --- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c @@ -31,7 +31,7 @@ struct uniphier_pinctrl_reg_region { struct list_head node; unsigned int base; unsigned int nregs; - u32 vals[]; + u32 vals[] __counted_by(nregs); }; struct uniphier_pinctrl_priv { -- 2.34.1
