1 files changed, 4 insertions, 3 deletions

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 575f9bd51ccd..b007f8af6e1f 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -206,10 +206,11 @@ static void ip_expire(unsigned long arg)
                 struct sk_buff *head = qp->q.fragments;
 
                 /* Send an ICMP "Fragment Reassembly Timeout" message. */
-                if ((head->dev = dev_get_by_index(net, qp->iif)) != NULL) {
+                rcu_read_lock();
+                head->dev = dev_get_by_index_rcu(net, qp->iif);
+                if (head->dev)
                         icmp_send(head, ICMP_TIME_EXCEEDED, ICMP_EXC_FRAGTIME, 0);
-                        dev_put(head->dev);
-                }
+                rcu_read_unlock();
         }
 out:
         spin_unlock(&qp->q.lock);