Commit ff861ca9 authored by Kees Cook's avatar Kees Cook Committed by Lee Jones
Browse files

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: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200938.never.767-kees@kernel.org


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent a09af055

drivers/leds/leds-aw200xx.c

+1 −1
Original line number Diff line number Diff line
@@ -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,