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leds: cr0014114: Annotate struct cr0014114 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 cr0014114.

[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/20230915200948.never.728-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Kees Cook 2023-09-15 13:09:48 -07:00 committed by Lee Jones
parent ff861ca9f2
commit 679cec1809
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/leds-cr0014114.c
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@ -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)