linux-kernel - [PATCH 4.9 16/39] ipv6: allow PMTU exceptions to local routes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180624152353.831006673@linuxfoundation.org>
Date:   Sun, 24 Jun 2018 23:24:03 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Martin KaFai Lau <kafai@...com>,
        Julian Anastasov <ja@....bg>, David Ahern <dsahern@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 16/39] ipv6: allow PMTU exceptions to local routes

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Julian Anastasov <ja@....bg>

[ Upstream commit 0975764684487bf3f7a47eef009e750ea41bd514 ]

IPVS setups with local client and remote tunnel server need
to create exception for the local virtual IP. What we do is to
change PMTU from 64KB (on "lo") to 1460 in the common case.

Suggested-by: Martin KaFai Lau <kafai@...com>
Fixes: 45e4fd26683c ("ipv6: Only create RTF_CACHE routes after encountering pmtu exception")
Fixes: 7343ff31ebf0 ("ipv6: Don't create clones of host routes.")
Signed-off-by: Julian Anastasov <ja@....bg>
Acked-by: David Ahern <dsahern@...il.com>
Acked-by: Martin KaFai Lau <kafai@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv6/route.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1373,9 +1373,6 @@ static void __ip6_rt_update_pmtu(struct
 {
 	struct rt6_info *rt6 = (struct rt6_info *)dst;
 
-	if (rt6->rt6i_flags & RTF_LOCAL)
-		return;
-
 	if (dst_metric_locked(dst, RTAX_MTU))
 		return;