Re: [PATCH v2 1/2] gpio: cdev: check for NULL labels when sanitizing them for irqs

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Thu, Apr 4, 2024 at 11:33 AM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> We need to take into account that a line's consumer label may be NULL
> and not try to kstrdup() it in that case but rather pass the NULL
> pointer up the stack to the interrupt request function.
>
> To that end: let make_irq_label() return NULL as a valid return value
> and use ERR_PTR() instead to signal an allocation failure to callers.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: b34490879baa ("gpio: cdev: sanitize the label before requesting the interrupt")
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> Closes: https://lore.kernel.org/lkml/20240402093534.212283-1-naresh.kamboju@xxxxxxxxxx/
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---

Tested-by: Anders Roxell <anders.roxell@xxxxxxxxxx>