-
由 Rik van Riel 提交于
mainline inclusion from mainline-v6.1-rc2 commit 12df140f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6EVPO Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=12df140f0bdfae5dcfc81800970dd7f6f632e00c -------------------------------- The h->*_huge_pages counters are protected by the hugetlb_lock, but alloc_huge_page has a corner case where it can decrement the counter outside of the lock. This could lead to a corrupted value of h->resv_huge_pages, which we have observed on our systems. Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a potential race. Link: https://lkml.kernel.org/r/20221017202505.0e6a4fcd@imladris.surriel.com Fixes: a88c7695 ("mm: hugetlb: fix hugepage memory leak caused by wrong reserve count") Signed-off-by: NRik van Riel <riel@surriel.com> Reviewed-by: NMike Kravetz <mike.kravetz@oracle.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Glen McCready <gkmccready@meta.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: <stable@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NZhang Peng <zhangpeng362@huawei.com> Reviewed-by: Ntong tiangen <tongtiangen@huawei.com> Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>
90da40b5