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 Cc: Pavel Machek <[email protected]> Cc: Lee Jones <[email protected]> Cc: Bjorn Andersson <[email protected]> Cc: "Uwe Kleine-König" <[email protected]> Cc: Douglas Anderson <[email protected]> Cc: Anjelique Melendez <[email protected]> Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> --- drivers/leds/rgb/leds-qcom-lpg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c index df469aaa7e6e..7d93e02a030a 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); }; /** -- 2.34.1
