From: Kees Cook Date: Fri, 15 Sep 2023 20:11:00 +0000 (-0700) Subject: leds: qcom-lpg: Annotate struct lpg_led with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0847c33bafe5b58f2f223153c007c1e185f84f48;p=linux.git leds: qcom-lpg: Annotate struct lpg_led 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 lpg_led. [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/20230915201059.never.086-kees@kernel.org Signed-off-by: Lee Jones --- diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c index df469aaa7e6e7..7d93e02a030a2 100644 --- a/drivers/leds/rgb/leds-qcom-lpg.c +++ b/drivers/leds/rgb/leds-qcom-lpg.c @@ -173,7 +173,7 @@ struct lpg_led { struct led_classdev_mc mcdev; unsigned int num_channels; - struct lpg_channel *channels[]; + struct lpg_channel *channels[] __counted_by(num_channels); }; /**