This is a note to let you know that I've just added the patch titled

netfilter: ipvs: Fix inappropriate output of procfs

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: netfilter-ipvs-fix-inappropriate-output-of-procfs.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Dec 18 14:47:43 CET 2017

From: KUWAZAWA Takuya albatross0@gmail.com Date: Sun, 15 Oct 2017 20:54:10 +0900 Subject: netfilter: ipvs: Fix inappropriate output of procfs

From: KUWAZAWA Takuya albatross0@gmail.com

[ Upstream commit c5504f724c86ee925e7ffb80aa342cfd57959b13 ]

Information about ipvs in different network namespace can be seen via procfs.

How to reproduce:

# ip netns add ns01 # ip netns add ns02 # ip netns exec ns01 ip a add dev lo 127.0.0.1/8 # ip netns exec ns02 ip a add dev lo 127.0.0.1/8 # ip netns exec ns01 ipvsadm -A -t 10.1.1.1:80 # ip netns exec ns02 ipvsadm -A -t 10.1.1.2:80

The ipvsadm displays information about its own network namespace only.

# ip netns exec ns01 ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.1.1.1:80 wlc

# ip netns exec ns02 ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.1.1.2:80 wlc

But I can see information about other network namespace via procfs.

# ip netns exec ns01 cat /proc/net/ip_vs IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 0A010101:0050 wlc TCP 0A010102:0050 wlc

# ip netns exec ns02 cat /proc/net/ip_vs IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 0A010102:0050 wlc

Signed-off-by: KUWAZAWA Takuya albatross0@gmail.com Acked-by: Julian Anastasov ja@ssi.bg Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/ipvs/ip_vs_ctl.c | 4 ++++ 1 file changed, 4 insertions(+)

--- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -1999,12 +1999,16 @@ static int ip_vs_info_seq_show(struct se seq_puts(seq, " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); } else { + struct net *net = seq_file_net(seq); + struct netns_ipvs *ipvs = net_ipvs(net); const struct ip_vs_service *svc = v; const struct ip_vs_iter *iter = seq->private; const struct ip_vs_dest *dest; struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler); char *sched_name = sched ? sched->name : "none";

+ if (svc->ipvs != ipvs) + return 0; if (iter->table == ip_vs_svc_table) { #ifdef CONFIG_IP_VS_IPV6 if (svc->af == AF_INET6)

Patches currently in stable-queue which might be from albatross0@gmail.com are

queue-4.4/netfilter-ipvs-fix-inappropriate-output-of-procfs.patch