From: Zi Yan <ziy@xxxxxxxxxx>
When dealing with hugetlb pages, struct page is not guaranteed to be
contiguous on SPARSEMEM without VMEMMAP. Use nth_page() to handle it
properly.
Fixes: 38c1ddbde6c6 ("hugetlbfs: improve read HWPOISON hugepage")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
---
fs/hugetlbfs/inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 316c4cebd3f3..60fce26ff937 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -295,7 +295,7 @@ static size_t adjust_range_hwpoison(struct page *page, size_t offset, size_t byt
size_t res = 0;
/* First subpage to start the loop. */
- page += offset / PAGE_SIZE;
+ page = nth_page(page, offset / PAGE_SIZE);
offset %= PAGE_SIZE;
while (1) {
if (is_raw_hwpoison_page_in_hugepage(page))
@@ -309,7 +309,7 @@ static size_t adjust_range_hwpoison(struct page *page, size_t offset, size_t byt
break;
offset += n;
if (offset == PAGE_SIZE) {
- page++;
+ page = nth_page(page, 1);
offset = 0;
}
}
--
2.40.1
