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 mt6360_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: Matthias Brugger <matthias....@gmail.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delre...@collabora.com> Cc: Gene Chen <gene_c...@richtek.com> Cc: Jacek Anaszewski <jacek.anaszew...@gmail.com> Cc: Andy Shevchenko <andriy.shevche...@linux.intel.com> Cc: linux-l...@vger.kernel.org Cc: linux-arm-ker...@lists.infradead.org Cc: linux-media...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/leds/flash/leds-mt6360.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/leds/flash/leds-mt6360.c b/drivers/leds/flash/leds-mt6360.c index 1af6c5898343..b70dc689b33f 100644 --- a/drivers/leds/flash/leds-mt6360.c +++ b/drivers/leds/flash/leds-mt6360.c @@ -91,7 +91,7 @@ struct mt6360_priv { unsigned int fled_torch_used; unsigned int leds_active; unsigned int leds_count; - struct mt6360_led leds[]; + struct mt6360_led leds[] __counted_by(leds_count); }; static int mt6360_mc_brightness_set(struct led_classdev *lcdev, -- 2.34.1
