Re: [PATCH] sched/ext: fix cpumask leak in scx_init() error path

[Tejun Heo]

On Thu, Apr 09, 2026 at 01:23:12AM +0800, KobaK wrote:
> From: Koba Ko <kobak@xxxxxxxxxx>
> 
> In scx_init(), two cpumask allocations are combined with || short-circuit
> evaluation. If the first alloc_cpumask_var (scx_bypass_lb_donee_cpumask)
> succeeds but the second (scx_bypass_lb_resched_cpumask) fails, the first
> cpumask is leaked.

This is an initcall. It runs once and failure is a kernel bug triggering a
WARN. It won't fail and error handling is meaningless here. Once you fail
one of these, the system is not in a good state as later code paths assume
that these succeeded during boot. Not freeing is the least of our problems.

Thanks.

-- 
tejun