diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-07-09 17:26:29 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-03 12:05:17 +0200 |
| commit | 9fd5096c56894358af91ac00b3a2e9ddff73990a (patch) | |
| tree | 62601df96121d43e731dab5bf3a78b000e322020 | |
| parent | e786be4338eda590985fd3df707bedb836919d44 (diff) | |
hugetlb: fix memoryleak in hugetlb_mcopy_atomic_pte
commit da9a298f5fad0dc615079a340da42928bc5b138e upstream.
When alloc_huge_page fails, *pagep is set to NULL without put_page first.
So the hugepage indicated by *pagep is leaked.
Link: https://lkml.kernel.org/r/20220709092629.54291-1-linmiaohe@huawei.com
Fixes: 8cc5fcbb5be8 ("mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | mm/hugetlb.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 410bbb0aee32..859cfcaecddb 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5822,6 +5822,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, page = alloc_huge_page(dst_vma, dst_addr, 0); if (IS_ERR(page)) { + put_page(*pagep); ret = -ENOMEM; *pagep = NULL; goto out; |