Re: [PATCH v3] gpio: cdev: sanitize the label before requesting the interrupt

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Mon, Mar 25, 2024 at 10:02 AM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> When an interrupt is requested, a procfs directory is created under
> "/proc/irq/<irqnum>/<label>" where <label> is the string passed to one of
> the request_irq() variants.
>
> What follows is that the string must not contain the "/" character or
> the procfs mkdir operation will fail. We don't have such constraints for
> GPIO consumer labels which are used verbatim as interrupt labels for
> GPIO irqs. We must therefore sanitize the consumer string before
> requesting the interrupt.
>
> Let's replace all "/" with ":".
>
> Cc: stable@xxxxxxxxxxxxxxx
> Reported-by: Stefan Wahren <wahrenst@xxxxxxx>
> Closes: https://lore.kernel.org/linux-gpio/39fe95cb-aa83-4b8b-8cab-63947a726754@xxxxxxx/
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

Good work on this one!
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Yours,
Linus Walleij