From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754294Ab3BLUf5 (ORCPT ); Tue, 12 Feb 2013 15:35:57 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:53496 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753769Ab3BLUfx (ORCPT ); Tue, 12 Feb 2013 15:35:53 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, nitin padalia , Eric Dumazet , "David S. Miller" , Cong Wang , Eric Dumazet Subject: [ 17/61] net: prevent setting ttl=0 via IP_TTL Date: Tue, 12 Feb 2013 12:34:37 -0800 Message-Id: <20130212203420.642102909@linuxfoundation.org> X-Mailer: git-send-email 1.8.1.rc1.5.g7e0651a In-Reply-To: <20130212203417.890993903@linuxfoundation.org> References: <20130212203417.890993903@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cong Wang [ Upstream commit c9be4a5c49cf51cc70a993f004c5bb30067a65ce ] A regression is introduced by the following commit: commit 4d52cfbef6266092d535237ba5a4b981458ab171 Author: Eric Dumazet Date: Tue Jun 2 00:42:16 2009 -0700 net: ipv4/ip_sockglue.c cleanups Pure cleanups but it is not a pure cleanup... - if (val != -1 && (val < 1 || val>255)) + if (val != -1 && (val < 0 || val > 255)) Since there is no reason provided to allow ttl=0, change it back. Reported-by: nitin padalia Cc: nitin padalia Cc: Eric Dumazet Cc: David S. Miller Signed-off-by: Cong Wang Acked-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/ip_sockglue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -590,7 +590,7 @@ static int do_ip_setsockopt(struct sock case IP_TTL: if (optlen < 1) goto e_inval; - if (val != -1 && (val < 0 || val > 255)) + if (val != -1 && (val < 1 || val > 255)) goto e_inval; inet->uc_ttl = val; break;