Re: [PATCH] arm64: amu: Delay allocating cpumask for AMU FIE support

[Sudeep Holla]

On Fri, Jan 31, 2025 at 03:58:42PM +0000, Beata Michalska wrote:
> For the time being, the amu_fie_cpus cpumask is being exclusively used
> by the AMU-related internals of FIE support and is guaranteed to be
> valid on every access currently made. Still the mask is not being
> invalidated on one of the error handling code paths, which leaves
> a soft spot with theoretical risk of UAF for CPUMASK_OFFSTACK cases.
> To make things sound, delay allocating said cpumask
> (for CPUMASK_OFFSTACK) avoiding otherwise nasty sanitising case failing
> to register the cpufreq policy notifications.
>

I thought I had provided my tag, sorry for that. FWIW,

Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>

-- 
Regards,
Sudeep