Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by | Date | Fri, 15 Sep 2023 13:11:00 -0700 |
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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 <pavel@ucw.cz> Cc: Lee Jones <lee@kernel.org> Cc: Bjorn Andersson <quic_bjorande@quicinc.com> Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> Cc: Douglas Anderson <dianders@chromium.org> Cc: Anjelique Melendez <quic_amelende@quicinc.com> Cc: linux-leds@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- 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
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