Re: [PATCH 06/16] mm/page_alloc: fix freeing static percpu memory

[Oscar Salvador]

On Fri, Sep 09, 2022 at 05:24:41PM +0800, Miaohe Lin wrote:
> The size of struct per_cpu_zonestat can be 0 on !SMP && !NUMA. In that
> case, zone->per_cpu_zonestats will always equal to boot_zonestats. But
> in zone_pcp_reset(), zone->per_cpu_zonestats is freed via free_percpu()
> directly without checking against boot_zonestats first. boot_zonestats
> will be released by free_percpu() unexpectedly.
> 
> Fixes: 28f836b6777b ("mm/page_alloc: split per cpu page lists and zone stats")
> Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>

Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>


-- 
Oscar Salvador
SUSE Labs