From: Kees Cook Date: Fri, 15 Sep 2023 20:10:10 +0000 (-0700) Subject: leds: lm3697: Annotate struct lm3697 with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bcbadbb29cb6aa6f51505514ae635fd467ebca43;p=linux.git leds: lm3697: Annotate struct lm3697 with __counted_by 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 Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230915201010.never.399-kees@kernel.org Signed-off-by: Lee Jones --- diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c index cfb8ac220db6d..380d17a58fe93 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[] = {