Merge tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / route.c

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 24fd4c596643117faeca700748956ebe27541652..82cf2a722b2310803ec603f60d59cdf819481a4a 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -934,12 +934,14 @@ static u32 __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu)
        if (mtu < ip_rt_min_pmtu)
                mtu = ip_rt_min_pmtu;
 
+       rcu_read_lock();
        if (fib_lookup(dev_net(rt->dst.dev), fl4, &res) == 0) {
                struct fib_nh *nh = &FIB_RES_NH(res);
 
                update_or_create_fnhe(nh, fl4->daddr, 0, mtu,
                                      jiffies + ip_rt_mtu_expires);
        }
+       rcu_read_unlock();
        return mtu;
 }