This code calls folio_put() on an error pointer which will lead to a
crash. Check for both error pointers and NULL pointers before calling
folio_put().
Fixes: 38a55db9877c ("filemap: Handle error return from __filemap_get_folio()")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
---
mm/filemap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 657bcd887fdb..cd26617d8987 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3420,7 +3420,7 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
* re-find the vma and come back and find our hopefully still populated
* page.
*/
- if (!IS_ERR(folio))
+ if (!IS_ERR_OR_NULL(folio))
folio_put(folio);
if (mapping_locked)
filemap_invalidate_unlock_shared(mapping);
--
2.25.1
