From: Bartosz Golaszewski bartosz.golaszewski@linaro.org
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,