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drivers/gpio: ite: Validate num_pins to prevent untrusted loop bound

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Added a build assert to limit num_pins to a maximum allowable value to
prevent potential out-of-bounds access or infinite loops.

Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
This commit is contained in:
Tim Lin 2025-02-06 07:09:21 +08:00 committed by Benjamin Cabé
parent db0f20c6fb
commit 608d94b869
1 changed files with 4 additions and 0 deletions
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4
drivers/gpio/gpio_ite_it8xxx2_v2.c
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@ -27,6 +27,8 @@
LOG_MODULE_REGISTER(gpio_it8xxx2, LOG_LEVEL_ERR);
#define ITE_GPIO_MAX_PINS 8
/*
* Structure gpio_ite_cfg is about the setting of GPIO
* this config will be used at initial time
@ -530,6 +532,8 @@ static int gpio_ite_init(const struct device *dev)
}
#define GPIO_ITE_DEV_CFG_DATA(inst) \
BUILD_ASSERT(DT_INST_PROP(inst, ngpios) <= ITE_GPIO_MAX_PINS, \
"The maximum number of pins per port is 8."); \
static struct gpio_ite_data gpio_ite_data_##inst; \
static const struct gpio_ite_cfg gpio_ite_cfg_##inst = { \
.common = {.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(inst)}, \