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leds: mt6360: Annotate struct mt6360_priv 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 mt6360_priv.

[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>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230915201020.never.433-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Kees Cook 2023-09-15 13:10:20 -07:00 committed by Lee Jones
parent 6061302092
commit 476301c15d
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/flash/leds-mt6360.c
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@ -91,7 +91,7 @@ struct mt6360_priv {
unsigned int fled_torch_used;
unsigned int leds_active;
unsigned int leds_count;
struct mt6360_led leds[];
struct mt6360_led leds[] __counted_by(leds_count);
};
static int mt6360_mc_brightness_set(struct led_classdev *lcdev,