From: Kees Cook Date: Fri, 15 Sep 2023 20:09:39 +0000 (-0700) Subject: leds: aw200xx: Annotate struct aw200xx with __counted_by X-Git-Tag: io_uring-6.7-2023-11-10~18^2~41 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=ff861ca9f2d54a81d10cd3e8d2384fe17c10fdc4;p=linux-block.git leds: aw200xx: Annotate struct aw200xx 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 aw200xx. [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/20230915200938.never.767-kees@kernel.org Signed-off-by: Lee Jones --- diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c index 691a743cc9b0..4d517cace3e7 100644 --- a/drivers/leds/leds-aw200xx.c +++ b/drivers/leds/leds-aw200xx.c @@ -112,7 +112,7 @@ struct aw200xx { struct mutex mutex; u32 num_leds; u32 display_rows; - struct aw200xx_led leds[]; + struct aw200xx_led leds[] __counted_by(num_leds); }; static ssize_t dim_show(struct device *dev, struct device_attribute *devattr,