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leds: qcom-lpg: Annotate struct lpg_led 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 lpg_led.

[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/20230915201059.never.086-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Kees Cook 2023-09-15 13:11:00 -07:00 committed by Lee Jones
parent bcbadbb29c
commit 0847c33baf
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/rgb/leds-qcom-lpg.c
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@ -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);
};
/**