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| author |   Miaohe Lin <linmiaohe@huawei.com> | 2022-04-28 23:16:08 -0700 |
|---|---|---|
| committer |   akpm <akpm@linux-foundation.org> | 2022-04-28 23:16:08 -0700 |
| commit | 4cd614841c06338a087769ee3cfa96718784d1f5 (patch) | |
| tree | ee09e7c06e2513b977739324f12cc9ee7d88f263 /fs/dax.c | |
| parent | mm/migration: fix potential invalid node access for reclaim-based migration (diff) | |
| download | wireguard-linux-4cd614841c06338a087769ee3cfa96718784d1f5.tar.xz wireguard-linux-4cd614841c06338a087769ee3cfa96718784d1f5.zip | |
mm/migration: fix possible do_pages_stat_array racing with memory offline
When follow_page peeks a page, the page could be migrated and then be
offlined while it's still being used by the do_pages_stat_array(). Use
FOLL_GET to hold the page refcnt to fix this potential race.
Link: https://lkml.kernel.org/r/20220318111709.60311-12-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/dax.c')
0 files changed, 0 insertions, 0 deletions