From: gnezdo <gnezdo@openbsd.org>
Date: Fri, 23 Jun 2023 04:36:49 +0000 (+0000)
Subject: Avoid division by 0 in m_pool_used
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=6d14abdcc245478e552a68f46f222fe4f7d3c847;p=openbsd

Avoid division by 0 in m_pool_used

OK dlg@

Reported-by: syzbot+a377d5cd833c2343429a@syzkaller.appspotmail.com
---

diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index 440a1ec5ecb..ba59f13a954 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uipc_mbuf.c,v 1.286 2023/05/16 20:09:27 mvs Exp $	*/
+/*	$OpenBSD: uipc_mbuf.c,v 1.287 2023/06/23 04:36:49 gnezdo Exp $	*/
 /*	$NetBSD: uipc_mbuf.c,v 1.15.4.1 1996/06/13 17:11:44 cgd Exp $	*/
 
 /*
@@ -214,7 +214,7 @@ nmbclust_update(long newval)
 {
 	int i;
 
-	if (newval < 0 || newval > LONG_MAX / MCLBYTES)
+	if (newval <= 0 || newval > LONG_MAX / MCLBYTES)
 		return ERANGE;
 	/* update the global mbuf memory limit */
 	nmbclust = newval;