[PATCH 03/18] gpio: mockup: verify the number of GPIO chips requested

Bartosz Golaszewski
2017-11-27T11:00:46Z

The number of supported mockup chips is limited. Check this limit when
parsing the module parameters.

Also: make sure that each chip is described with a pair.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
---
drivers/gpio/gpio-mockup.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index b70f3b0c30b1..0a269cbe197c 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -330,7 +330,9 @@ static int __init gpio_mockup_init(void)
{
int err;

- if (gpio_mockup_params_nr < 2 || (gpio_mockup_params_nr % 2))
+ if ((gpio_mockup_params_nr < 2) ||
+ (gpio_mockup_params_nr % 2) ||
+ (gpio_mockup_params_nr > GPIO_MOCKUP_MAX_RANGES))
return -EINVAL;

gpio_mockup_dbg_dir = debugfs_create_dir("gpio-mockup-event", NULL);
--
2.15.0