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-rw-r--r--mm/hugetlb.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c0327380718..bd031a4c738 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2515,22 +2515,19 @@ retry:
hugepage_add_new_anon_rmap(page, vma, address);
}
} else {
+ /*
+ * If memory error occurs between mmap() and fault, some process
+ * don't have hwpoisoned swap entry for errored virtual address.
+ * So we need to block hugepage fault by PG_hwpoison bit check.
+ */
+ if (unlikely(PageHWPoison(page))) {
+ ret = VM_FAULT_HWPOISON;
+ goto backout_unlocked;
+ }
page_dup_rmap(page);
}
/*
- * Since memory error handler replaces pte into hwpoison swap entry
- * at the time of error handling, a process which reserved but not have
- * the mapping to the error hugepage does not have hwpoison swap entry.
- * So we need to block accesses from such a process by checking
- * PG_hwpoison bit here.
- */
- if (unlikely(PageHWPoison(page))) {
- ret = VM_FAULT_HWPOISON;
- goto backout_unlocked;
- }
-
- /*
* If we are going to COW a private mapping later, we examine the
* pending reservations for this page now. This will ensure that
* any allocations necessary to record that reservation occur outside