From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Chen Subject: [PATCH net-next 5/8] ipv6: Check return of dev_set_allmulti Date: Fri, 20 Jun 2008 08:55:23 +0800 Message-ID: <485AFFFB.5040901@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: YOSHIFUJI Hideaki , NETDEV , Patrick McHardy To: "David S. Miller" Return-path: Received: from cn.fujitsu.com ([222.73.24.84]:49402 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754670AbYFTA7X (ORCPT ); Thu, 19 Jun 2008 20:59:23 -0400 Sender: netdev-owner@vger.kernel.org List-ID: allmulti might overflow. Commit: "netdevice: Fix promiscuity and allmulti overflow" in net-next makes dev_set_promiscuity/allmulti return error number if overflow happened. Here, we check the positive increment for allmulti to get error return. Signed-off-by: Wang Chen --- net/ipv6/ip6mr.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 1479618..7a97566 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -603,6 +603,7 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock) int vifi = vifc->mif6c_mifi; struct mif_device *v = &vif6_table[vifi]; struct net_device *dev; + int err; /* Is vif busy ? */ if (MIF_EXISTS(vifi)) @@ -632,7 +633,10 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock) return -EINVAL; } - dev_set_allmulti(dev, 1); + /* Check whether allmulti overflow */ + err = dev_set_allmulti(dev, 1); + if (err) + return err; /* * Fill in the VIF structures -- 1.5.3.4