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 atmel_ebi_dev. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Krzysztof Kozlowski <krzysztof.kozlow...@linaro.org> Cc: Nicolas Ferre <nicolas.fe...@microchip.com> Cc: Alexandre Belloni <alexandre.bell...@bootlin.com> Cc: Claudiu Beznea <claudiu.bez...@tuxon.dev> Cc: linux-arm-ker...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/memory/atmel-ebi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memory/atmel-ebi.c b/drivers/memory/atmel-ebi.c index 635966d705cb..ec6100bc94c5 100644 --- a/drivers/memory/atmel-ebi.c +++ b/drivers/memory/atmel-ebi.c @@ -30,7 +30,7 @@ struct atmel_ebi_dev { struct atmel_ebi *ebi; u32 mode; int numcs; - struct atmel_ebi_dev_config configs[]; + struct atmel_ebi_dev_config configs[] __counted_by(numcs); }; struct atmel_ebi_caps { -- 2.34.1
