Messages in this thread | | | Date | Fri, 15 Sep 2023 14:47:56 -0600 | Subject | Re: [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 9/15/23 14:11, Kees Cook wrote: > 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>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks -- Gustavo
> --- > 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); > }; > > /**
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