* [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by
@ 2023-09-15 20:09 Kees Cook
2023-09-15 20:46 ` Gustavo A. R. Silva
2023-09-20 13:36 ` (subset) " Lee Jones
0 siblings, 2 replies; 3+ messages in thread
From: Kees Cook @ 2023-09-15 20:09 UTC (permalink / raw)
To: Pavel Machek
Cc: Kees Cook, Lee Jones, linux-leds, Nathan Chancellor,
Nick Desaulniers, Tom Rix, 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 cr0014114.
[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: linux-leds@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/leds/leds-cr0014114.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/leds/leds-cr0014114.c b/drivers/leds/leds-cr0014114.c
index b33bca397ea6..c9914fc51f20 100644
--- a/drivers/leds/leds-cr0014114.c
+++ b/drivers/leds/leds-cr0014114.c
@@ -56,7 +56,7 @@ struct cr0014114 {
struct spi_device *spi;
u8 *buf;
unsigned long delay;
- struct cr0014114_led leds[];
+ struct cr0014114_led leds[] __counted_by(count);
};
static void cr0014114_calc_crc(u8 *buf, const size_t len)
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by
2023-09-15 20:09 [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by Kees Cook
@ 2023-09-15 20:46 ` Gustavo A. R. Silva
2023-09-20 13:36 ` (subset) " Lee Jones
1 sibling, 0 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2023-09-15 20:46 UTC (permalink / raw)
To: Kees Cook, Pavel Machek
Cc: Lee Jones, linux-leds, Nathan Chancellor, Nick Desaulniers,
Tom Rix, linux-kernel, llvm, linux-hardening
On 9/15/23 14:09, 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 cr0014114.
>
> [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: 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/leds-cr0014114.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/leds/leds-cr0014114.c b/drivers/leds/leds-cr0014114.c
> index b33bca397ea6..c9914fc51f20 100644
> --- a/drivers/leds/leds-cr0014114.c
> +++ b/drivers/leds/leds-cr0014114.c
> @@ -56,7 +56,7 @@ struct cr0014114 {
> struct spi_device *spi;
> u8 *buf;
> unsigned long delay;
> - struct cr0014114_led leds[];
> + struct cr0014114_led leds[] __counted_by(count);
> };
>
> static void cr0014114_calc_crc(u8 *buf, const size_t len)
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: (subset) [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by
2023-09-15 20:09 [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by Kees Cook
2023-09-15 20:46 ` Gustavo A. R. Silva
@ 2023-09-20 13:36 ` Lee Jones
1 sibling, 0 replies; 3+ messages in thread
From: Lee Jones @ 2023-09-20 13:36 UTC (permalink / raw)
To: Pavel Machek, Kees Cook
Cc: Lee Jones, linux-leds, Nathan Chancellor, Nick Desaulniers,
Tom Rix, linux-kernel, llvm, linux-hardening
On Fri, 15 Sep 2023 13:09:48 -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 cr0014114.
>
> [...]
Applied, thanks!
[1/1] leds: cr0014114: Annotate struct cr0014114 with __counted_by
commit: dfd75548c30c4a27bcc4c81aed0287d2e8b62add
--
Lee Jones [李琼斯]
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-09-20 13:36 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-09-15 20:09 [PATCH] leds: cr0014114: Annotate struct cr0014114 with __counted_by Kees Cook
2023-09-15 20:46 ` Gustavo A. R. Silva
2023-09-20 13:36 ` (subset) " Lee Jones
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).