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authorDavid Ahern <dsahern@gmail.com>2019-01-04 16:58:15 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-26 09:37:00 +0100
commita2fc92be9f39dea7cff71a6e8b076dc3e24a5c1a (patch)
tree1540e1eb55fa534f8aba855edd851f31c9a2a399 /net
parent3b68e5cf57f08ad1a9dd7f8ca48ae1326ac98824 (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>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/af_inet6.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 9ccbf74deb99..5a97f53da8c4 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -317,6 +317,7 @@ 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
@@ -327,9 +328,17 @@ 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) &&