diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2023-07-11 13:50:16 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:20 -0700 |
| commit | d31155b8f29ce380f7816e54dee161db6d752909 (patch) | |
| tree | f5ff39112ca0b8acf6dfd351842d50f40518aa83 /lib/netdev-notifier-error-inject.c | |
| parent | a363d1224b5add67a7cafab9fdb9f19d569fbe98 (diff) | |
mm: memory-failure: fix race window when trying to get hugetlb folio
page_folio() is fetched before calling get_hwpoison_hugetlb_folio()
without hugetlb_lock being held. So hugetlb page could be demoted before
get_hwpoison_hugetlb_folio() holding hugetlb_lock but after page_folio()
is fetched. So get_hwpoison_hugetlb_folio() will hold unexpected extra
refcnt of hugetlb folio while leaving demoted page un-refcnted.
Link: https://lkml.kernel.org/r/20230711055016.2286677-9-linmiaohe@huawei.com
Fixes: 25182f05ffed ("mm,hwpoison: fix race with hugetlb page allocation")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/netdev-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions