Re: [PATCH 1/4] genirq/irq_sim: dispose of remaining mappings before removing the domain

[Bartosz Golaszewski]

On Sat, Aug 12, 2023 at 9:45 PM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> If the device providing simulated interrupts is unbound (real life
> example: gpio-sim is disabled with users that didn't free their irqs)
> and removes the simulated domain while interrupts are still requested,
> we will hit memory issues when they are eventually freed and the
> mappings destroyed in the process.
>
> Specifically we'll access freed memory in __irq_domain_deactivate_irq().
>
> Dispose of all mappings before removing the simulator domain.
>
> Fixes: b19af510e67e ("genirq/irq_sim: Add a simple interrupt simulator framework")
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---

Please disregard this patch. I realized that it should be up to the
owner of the domain to dispose of mappings. Just like core GPIO does
for the domains it controls.

I will send the rest separately once they're reworked.

Bart