On 9/15/23 14:10, Kees Cook wrote:
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>
Reviewed-by: Gustavo A. R. Silva <gustavo...@kernel.org>
Thanks
--
Gustavo
---
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[] = {
