From 1b3d11ded50b5e912f833666ad7ae990a922c26e Mon Sep 17 00:00:00 2001 From: David Ahern Date: Wed, 2 Jan 2019 18:57:09 -0800 Subject: [PATCH] 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 Signed-off-by: David S. Miller Gbp-Pq: Topic bugfix/all Gbp-Pq: Name ipv6-Consider-sk_bound_dev_if-when-binding-a-socket-.patch --- net/ipv6/af_inet6.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 9a4261e5027..fc030aaca02 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -349,6 +349,9 @@ static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, err = -EINVAL; goto out_unlock; } + } + + if (sk->sk_bound_dev_if) { dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); if (!dev) { err = -ENODEV; -- 2.30.2