[NETNS][IPV6] proc - protect snmp6 from non-init_net calls

This patchset avoids creation of the /proc entry for snmp6 when
the call is made from a network namespace different from the init_net.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index 5ba7ae849d04..2453f2229ef7 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -220,6 +220,9 @@ int snmp6_register_dev(struct inet6_dev *idev)
         if (!idev || !idev->dev)
                 return -EINVAL;
 
+        if (idev->dev->nd_net != &init_net)
+                return 0;
+
         if (!proc_net_devsnmp6)
                 return -ENOENT;