diff options
Diffstat (limited to 'net/packet/af_packet.c')
| -rw-r--r-- | net/packet/af_packet.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 8e6f3a734ba0..e75d2932475a 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -4561,7 +4561,11 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, spin_lock(&po->bind_lock); WRITE_ONCE(po->num, num); - if (was_running) + /* + * NETDEV_UNREGISTER may have invalidated the binding while bind_lock + * was dropped above. Do not re-add a fanout hook to a dead device. + */ + if (was_running && READ_ONCE(po->ifindex) != -1) register_prot_hook(sk); spin_unlock(&po->bind_lock); |