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 gpio_leds_priv. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Pavel Machek <pa...@ucw.cz> Cc: Lee Jones <l...@kernel.org> Cc: linux-l...@vger.kernel.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/leds/leds-gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 7bfe40a6bfdd..a6597f0f3eb4 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -142,7 +142,7 @@ static int create_gpio_led(const struct gpio_led *template, struct gpio_leds_priv { int num_leds; - struct gpio_led_data leds[]; + struct gpio_led_data leds[] __counted_by(num_leds); }; static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev) -- 2.34.1
