When huge_add_to_page_cache() fails, the page is freed directly without
calling restore_reserve_on_error() to restore reserve for newly allocated
pages not in page cache. Fix this by calling restore_reserve_on_error()
when huge_add_to_page_cache fails.
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ff991e5bdf1f..b69d7808f457 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5603,6 +5603,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
if (vma->vm_flags & VM_MAYSHARE) {
int err = huge_add_to_page_cache(page, mapping, idx);
if (err) {
+ restore_reserve_on_error(h, vma, haddr, page);
put_page(page);
if (err == -EEXIST)
goto retry;
--
2.23.0
