diff --git a/mm/gup.c b/mm/gup.c
index f809361227e7..cc4fa18783ce 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -3527,6 +3527,20 @@ long memfd_pin_folios(struct file *memfd, loff_t start, loff_t end,
 					goto err;
 				}
 
+				/*
+				 * fallocate() can leave folios in the
+				 * page cache that were never cleared.
+				 */
+				if (!folio_test_uptodate(folio)) {
+					folio_lock(folio);
+					if (!folio_test_uptodate(folio)) {
+						folio_zero_range(folio, 0, folio_size(folio));
+						flush_dcache_folio(folio);
+						folio_mark_uptodate(folio);
+					}
+					folio_unlock(folio);
+				}
+
 				if (nr_folios == 0)
 					*offset = offset_in_folio(folio, start);