Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36234 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752914AbeBWScg (ORCPT ); Fri, 23 Feb 2018 13:32:36 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nogah Frankel , "David S. Miller" , Sasha Levin Subject: [PATCH 3.18 46/58] net_sched: red: Avoid devision by zero Date: Fri, 23 Feb 2018 19:26:45 +0100 Message-Id: <20180223170214.013846882@linuxfoundation.org> In-Reply-To: <20180223170206.724655284@linuxfoundation.org> References: <20180223170206.724655284@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nogah Frankel [ Upstream commit 5c472203421ab4f928aa1ae9e1dbcfdd80324148 ] Do not allow delta value to be zero since it is used as a divisor. Fixes: 8af2a218de38 ("sch_red: Adaptative RED AQM") Signed-off-by: Nogah Frankel Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- include/net/red.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/net/red.h +++ b/include/net/red.h @@ -178,7 +178,7 @@ static inline void red_set_parms(struct p->qth_max = qth_max << Wlog; p->Wlog = Wlog; p->Plog = Plog; - if (delta < 0) + if (delta <= 0) delta = 1; p->qth_delta = delta; if (!max_P) {