===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/rsync/io.c,v
retrieving revision 1.20
retrieving revision 1.21
diff -u -r1.20 -r1.21
--- src/usr.bin/rsync/io.c	2021/06/30 13:10:04	1.20
+++ src/usr.bin/rsync/io.c	2021/12/28 11:59:48	1.21
@@ -1,4 +1,4 @@
-/*	$OpenBSD: io.c,v 1.20 2021/06/30 13:10:04 claudio Exp $ */
+/*	$OpenBSD: io.c,v 1.21 2021/12/28 11:59:48 claudio Exp $ */
 /*
  * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -143,7 +143,7 @@
 	}
 
 	while (sz > 0) {
-		wsz = sz & 0xFFFFFF;
+		wsz = (sz < 0xFFFFFF) ? sz : 0xFFFFFF;
 		tag = (7 << 24) + wsz;
 		tagbuf = htole32(tag);
 		if (!io_write_blocking(fd, &tagbuf, sizeof(tagbuf))) {