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leds: el15203000: Annotate struct el15203000 with __counted_by

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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 el15203000.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200955.never.871-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Kees Cook 2023-09-15 13:09:56 -07:00 committed by Lee Jones
parent 679cec1809
commit a29feca113
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/leds-el15203000.c
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@ -80,7 +80,7 @@ struct el15203000 {
struct spi_device *spi;
unsigned long delay;
size_t count;
struct el15203000_led leds[];
struct el15203000_led leds[] __counted_by(count);
};
#define to_el15203000_led(d) container_of(d, struct el15203000_led, ldev)