Commit 160ff18a authored by Ben Greear's avatar Ben Greear Committed by David S. Miller

af-packet: Hold reference to bound network devices.

Old code was probably safe, but with this change we
can actually use the netdev object, not just compare
the pointer values.
Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e990b37b
......@@ -1342,6 +1342,10 @@ static int packet_release(struct socket *sock)
__dev_remove_pack(&po->prot_hook);
__sock_put(sk);
}
if (po->prot_hook.dev) {
dev_put(po->prot_hook.dev);
po->prot_hook.dev = NULL;
}
spin_unlock(&po->bind_lock);
packet_flush_mclist(sk);
......@@ -1395,6 +1399,8 @@ static int packet_do_bind(struct sock *sk, struct net_device *dev, __be16 protoc
po->num = protocol;
po->prot_hook.type = protocol;
if (po->prot_hook.dev)
dev_put(po->prot_hook.dev);
po->prot_hook.dev = dev;
po->ifindex = dev ? dev->ifindex : 0;
......@@ -1439,10 +1445,8 @@ static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
strlcpy(name, uaddr->sa_data, sizeof(name));
dev = dev_get_by_name(sock_net(sk), name);
if (dev) {
if (dev)
err = packet_do_bind(sk, dev, pkt_sk(sk)->num);
dev_put(dev);
}
return err;
}
......@@ -1470,8 +1474,6 @@ static int packet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len
goto out;
}
err = packet_do_bind(sk, dev, sll->sll_protocol ? : pkt_sk(sk)->num);
if (dev)
dev_put(dev);
out:
return err;
......@@ -2240,6 +2242,8 @@ static int packet_notifier(struct notifier_block *this, unsigned long msg, void
}
if (msg == NETDEV_UNREGISTER) {
po->ifindex = -1;
if (po->prot_hook.dev)
dev_put(po->prot_hook.dev);
po->prot_hook.dev = NULL;
}
spin_unlock(&po->bind_lock);
......
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