diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 43bb5a6a9924..27ab7bd844ec 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -1509,8 +1509,15 @@ static void z_erofs_fill_bio_vec(struct bio_vec *bvec,
 	DBG_BUGON(z_erofs_is_shortlived_page(bvec->bv_page));
 
 	folio = page_folio(zbv.page);
-	/* For preallocated managed folios, add them to page cache here */
+	/*
+	 * Preallocated folios are added to the managed cache here rather than
+	 * in z_erofs_bind_cache() in order to keep these folios locked in
+	 * increasing (physical) address order.
+	 * Clear folio->private before these folios become visible to others in
+	 * the managed cache to avoid duplicate additions for unaligned extents.
+	 */
 	if (folio->private == Z_EROFS_PREALLOCATED_FOLIO) {
+		folio->private = NULL;
 		tocache = true;
 		goto out_tocache;
 	}
@@ -1546,14 +1553,8 @@ static void z_erofs_fill_bio_vec(struct bio_vec *bvec,
 			}
 			return;
 		}
-		/*
-		 * Already linked with another pcluster, which only appears in
-		 * crafted images by fuzzers for now.  But handle this anyway.
-		 */
-		tocache = false;	/* use temporary short-lived pages */
 	} else {
 		DBG_BUGON(1); /* referenced managed folios can't be truncated */
-		tocache = true;
 	}
 	folio_unlock(folio);
 	folio_put(folio);