* [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by
@ 2023-09-15 20:11 Kees Cook
2023-09-15 20:47 ` Gustavo A. R. Silva
2023-09-20 13:42 ` (subset) " Lee Jones
0 siblings, 2 replies; 3+ messages in thread
From: Kees Cook @ 2023-09-15 20:11 UTC (permalink / raw)
To: Pavel Machek
Cc: Kees Cook, Lee Jones, Bjorn Andersson, Uwe Kleine-König,
Douglas Anderson, Anjelique Melendez, linux-leds,
Nathan Chancellor, Nick Desaulniers, Tom Rix, Neil Armstrong,
Luca Weiss, Lu Hongfei, Dmitry Baryshkov, linux-kernel, llvm,
linux-hardening
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
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by
2023-09-15 20:11 [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by Kees Cook
@ 2023-09-15 20:47 ` Gustavo A. R. Silva
2023-09-20 13:42 ` (subset) " Lee Jones
1 sibling, 0 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2023-09-15 20:47 UTC (permalink / raw)
To: Kees Cook, Pavel Machek
Cc: Lee Jones, Bjorn Andersson, Uwe Kleine-König,
Douglas Anderson, Anjelique Melendez, linux-leds,
Nathan Chancellor, Nick Desaulniers, Tom Rix, Neil Armstrong,
Luca Weiss, Lu Hongfei, Dmitry Baryshkov, linux-kernel, llvm,
linux-hardening
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);
> };
>
> /**
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: (subset) [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by
2023-09-15 20:11 [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by Kees Cook
2023-09-15 20:47 ` Gustavo A. R. Silva
@ 2023-09-20 13:42 ` Lee Jones
1 sibling, 0 replies; 3+ messages in thread
From: Lee Jones @ 2023-09-20 13:42 UTC (permalink / raw)
To: Pavel Machek, Kees Cook
Cc: Lee Jones, Bjorn Andersson, Uwe Kleine-König,
Douglas Anderson, Anjelique Melendez, linux-leds,
Nathan Chancellor, Nick Desaulniers, Tom Rix, Neil Armstrong,
Luca Weiss, Lu Hongfei, Dmitry Baryshkov, linux-kernel, llvm,
linux-hardening
On Fri, 15 Sep 2023 13:11:00 -0700, 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.
>
> [...]
Applied, thanks!
[1/1] leds: qcom-lpg: Annotate struct lpg_led with __counted_by
commit: 3a2a14ad346d60da60aef0a2afc1fb256a56c83c
--
Lee Jones [李琼斯]
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2023-09-15 20:11 [PATCH] leds: qcom-lpg: Annotate struct lpg_led with __counted_by Kees Cook
2023-09-15 20:47 ` Gustavo A. R. Silva
2023-09-20 13:42 ` (subset) " Lee Jones
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