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ipv6: Consider sk_bound_dev_if when binding a socket to an address 

IPv6 does not consider if the socket is bound to a device when binding
to an address. The result is that a socket can be bound to eth0 and then
bound to the address of eth1. If the device is a VRF, the result is that
a socket can only be bound to an address in the default VRF.

Resolve by considering the device if sk_bound_dev_if is set.

This problem exists from the beginning of git history.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-01-02 18:57:09 -08:00 committed by David S. Miller
parent 73155879b3
commit c5ee066333
1 changed files with 3 additions and 0 deletions
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3
net/ipv6/af_inet6.c
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@ -350,6 +350,9 @@ static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
err = -EINVAL; err = -EINVAL;
goto out_unlock; goto out_unlock;
} }
}
if (sk->sk_bound_dev_if) {
dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
if (!dev) { if (!dev) {
err = -ENODEV; err = -ENODEV;