diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-09-16 15:22:47 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-03 14:03:29 -0700 |
| commit | 022e7fa0f73d7c90cf3d6bea3d4e4cc5df1e1087 (patch) | |
| tree | 7ae255503bb0820614baa09c0a86a82d78bcd368 /include/linux/mmzone.h | |
| parent | 5749fcc5f04cef4091dea0c2ba6b5c5f5e05a549 (diff) | |
mm/page_alloc: fix freeing static percpu memory
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.
Link: https://lkml.kernel.org/r/20220916072257.9639-7-linmiaohe@huawei.com
Fixes: 28f836b6777b ("mm/page_alloc: split per cpu page lists and zone stats")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mmzone.h')
0 files changed, 0 insertions, 0 deletions