From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
On Mon, 10 Feb 2025 11:51:54 +0100, Bartosz Golaszewski wrote:
> We've had instances of drivers returning invalid values from gpio_chip
> calbacks. In several cases these return values would be propagated to
> user-space and confuse programs that only expect 0 or negative errnos
> from ioctl()s. Let's sanitize the return values of callbacks and make
> sure we don't allow anyone see invalid ones.
>
> The first patch checks the return values of get_direction() in kernel
> where needed and is a backportable fix.
>
> [...]
Queued this one for fixes. The rest will be picked up next week once this
is upstream.
[1/8] gpiolib: check the return value of gpio_chip::get_direction()
commit: 9d846b1aebbe488f245f1aa463802ff9c34cc078
Best regards,
--
Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
