--- linux-gentoo/mm/filemap.c	2022-12-14 00:00:00.000 +0200
+++ linux-gentoo-old/mm/filemap.c	2022-12-06 00:00:00.000 +0200
@@ -1850,22 +1850,24 @@
 static void *mapping_get_entry(struct address_space *mapping, pgoff_t index)
 {
 	XA_STATE(xas, &mapping->i_pages, index);
 	struct folio *folio;
 
 	rcu_read_lock();
 repeat:
 	xas_reset(&xas);
 	folio = xas_load(&xas);
 	if (xas_retry(&xas, folio))
 		goto repeat;
+	if (WARN_ON(xa_is_internal(folio)))
+		goto repeat;
 	/*
 	 * A shadow entry of a recently evicted page, or a swap entry from
 	 * shmem/tmpfs.  Return it without attempting to raise page count.
 	 */
 	if (!folio || xa_is_value(folio))
 		goto out;
 
 	if (!folio_try_get_rcu(folio))
 		goto repeat;
 
 	if (unlikely(folio != xas_reload(&xas))) {