From: Kees Cook Date: Fri, 15 Sep 2023 20:09:56 +0000 (-0700) Subject: leds: el15203000: Annotate struct el15203000 with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a29feca113687cc691fe9f0f23652fafbafddc90;p=linux.git leds: el15203000: Annotate struct el15203000 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 el15203000. [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/20230915200955.never.871-kees@kernel.org Signed-off-by: Lee Jones --- diff --git a/drivers/leds/leds-el15203000.c b/drivers/leds/leds-el15203000.c index 7e7b617bcd56e..d40194a3029f5 100644 --- a/drivers/leds/leds-el15203000.c +++ b/drivers/leds/leds-el15203000.c @@ -80,7 +80,7 @@ struct el15203000 { struct spi_device *spi; unsigned long delay; size_t count; - struct el15203000_led leds[]; + struct el15203000_led leds[] __counted_by(count); }; #define to_el15203000_led(d) container_of(d, struct el15203000_led, ldev)