Re: [PATCH] mm: add missing alloc_percpu() NULL check in hotplug init

[Hongfu Li]

On 7/17/26 2:46 PM, Mike Rapoport wrote:
> On Fri, Jul 17, 2026 at 01:29:38PM +0800, Hongfu Li wrote:
> > From: Hongfu Li <lihongfu@xxxxxxxxxx>
> >
> > No NULL check is done for alloc_percpu() when initializing per-CPU
> > nodestats. Allocation failure leads to NULL pointer dereference
> > during later memset.
> >
> > Make function return int, check alloc_percpu() result and return
> > -ENOMEM on error. The caller chain already propagates this error
> > correctly.
> I already applied a fix from Gregory:
>
> https://patch.msgid.link/20260701221613.2818148-1-gourry@xxxxxxxxxx
>
> It'll be unstreamed soon.

Got it, I'll drop this patch as Gregory's fix is already on the way 
upstream.