__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