diff options
| author | David Ahern <dsahern@gmail.com> | 2019-01-04 16:58:15 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-26 09:38:32 +0100 |
| commit | dbbbd01ea8aef42c26215f6c749955a006b9801b (patch) | |
| tree | 45227fd1ebda901596ef4f5a19332c342fa09d6a | |
| parent | eb0e073f07bdb97226681e4e7e41457e72f2f4ae (diff) | |
ipv6: Consider sk_bound_dev_if when binding a socket to a v4 mapped address
[ Upstream commit ec90ad334986fa5856d11dd272f7f22fa86c55c4 ]
Similar to c5ee066333eb ("ipv6: Consider sk_bound_dev_if when binding a
socket to an address"), binding a socket to v4 mapped addresses needs to
consider if the socket is bound to a device.
This problem also exists from the beginning of git history.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/af_inet6.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index f7b425615c12..813e496174a3 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -306,6 +306,7 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) /* Check if the address belongs to the host. */ if (addr_type == IPV6_ADDR_MAPPED) { + struct net_device *dev = NULL; int chk_addr_ret; /* Binding to v4-mapped address on a v6-only socket @@ -316,9 +317,17 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) goto out; } + if (sk->sk_bound_dev_if) { + dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); + if (!dev) { + err = -ENODEV; + goto out; + } + } + /* Reproduce AF_INET checks to make the bindings consistent */ v4addr = addr->sin6_addr.s6_addr32[3]; - chk_addr_ret = inet_addr_type(net, v4addr); + chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); if (!net->ipv4.sysctl_ip_nonlocal_bind && !(inet->freebind || inet->transparent) && v4addr != htonl(INADDR_ANY) && |