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 lm3697. [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-lm3697.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c index cfb8ac220db6..380d17a58fe9 100644 --- a/drivers/leds/leds-lm3697.c +++ b/drivers/leds/leds-lm3697.c @@ -89,7 +89,7 @@ struct lm3697 { int bank_cfg; int num_banks; - struct lm3697_led leds[]; + struct lm3697_led leds[] __counted_by(num_banks); }; static const struct reg_default lm3697_reg_defs[] = { -- 2.34.1
