t created the page but is yet to
+		 * initialize it. We can drop the page reference and
+		 * try to get the page with lock in both cases to avoid
+		 * concurrency.
+		 */
 		if (page)
-			/*
-			 * drop the page reference and try
-			 * to get the page with lock. If we
-			 * are not uptodate that implies
-			 * somebody just created the page but
-			 * is yet to initialize the same. So
-			 * wait for it to initialize.
-			 */
 			put_page(page);
 		page = find_or_create_page(inode->i_mapping, pnum, gfp);
 		if (page) {
@@ -1274,7 +1275,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
 	poff = block % blocks_per_page;
 
 	page = find_get_page_flags(inode->i_mapping, pnum, FGP_ACCESSED);
-	if (page == NULL || !PageUptodate(page)) {
+	if (page == NULL || !PageUptodate(page) || PageLocked(page)) {
 		if (page)
 			put_page(page);
 		page = find_or_create_page(inode->i_mapping, pnum, gfp);
-- 
2.51.0[PATCH 5.10.y] ext4: fix e4b bitmap inconsistency reportsSasha Levin <sashal@kernel.org> undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined undefined—