netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr()

ipv6_dev_get_saddr() blindly de-references dst_dev to get the network
namespace, but some callers might pass NULL.  Change callers to pass a
namespace pointer instead.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 8f1e0543b3c4..08e4cbbe3f04 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -52,12 +52,14 @@ static struct dst_entry *xfrm6_dst_lookup(int tos, xfrm_address_t *saddr,
 static int xfrm6_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
 {
         struct dst_entry *dst;
+        struct net_device *dev;
 
         dst = xfrm6_dst_lookup(0, NULL, daddr);
         if (IS_ERR(dst))
                 return -EHOSTUNREACH;
 
-        ipv6_dev_get_saddr(ip6_dst_idev(dst)->dev,
+        dev = ip6_dst_idev(dst)->dev;
+        ipv6_dev_get_saddr(dev_net(dev), dev,
                            (struct in6_addr *)&daddr->a6, 0,
                            (struct in6_addr *)&saddr->a6);
         dst_release(dst);