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-rw-r--r--mm/page_table_check.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/page_table_check.c b/mm/page_table_check.c
index 25d8610c0042..0c511330dbc9 100644
--- a/mm/page_table_check.c
+++ b/mm/page_table_check.c
@@ -240,6 +240,8 @@ void __page_table_check_pte_clear_range(struct mm_struct *mm,
pte_t *ptep = pte_offset_map(&pmd, addr);
unsigned long i;
+ if (WARN_ON(!ptep))
+ return;
for (i = 0; i < PTRS_PER_PTE; i++) {
__page_table_check_pte_clear(mm, addr, *ptep);
addr += PAGE_SIZE;