[PATCH net-next 2/4] ipv6: route: make rtm_getroute not assume rtnl is locked

[Florian Westphal]

__dev_get_by_index assumes RTNL is held, use _rcu version instead.

Signed-off-by: Florian Westphal <f...@strlen.de>
---
 net/ipv6/route.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 035762fed07d..ec694fdb8cc5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3616,8 +3616,11 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, 
struct nlmsghdr *nlh,
                struct net_device *dev;
                int flags = 0;
 
-               dev = __dev_get_by_index(net, iif);
+               rcu_read_lock();
+
+               dev = dev_get_by_index_rcu(net, iif);
                if (!dev) {
+                       rcu_read_unlock();
                        err = -ENODEV;
                        goto errout;
                }
@@ -3629,6 +3632,8 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, 
struct nlmsghdr *nlh,
 
                if (!fibmatch)
                        dst = ip6_route_input_lookup(net, dev, &fl6, flags);
+
+               rcu_read_unlock();
        } else {
                fl6.flowi6_oif = oif;
 
-- 
2.13.0