[PATCH v1 11/25] j1939: socket: make sure, we connect only to the same interface.

[Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>]

Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
 net/can/j1939/socket.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index c637fad6c805..ca85fbce7556 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -329,6 +329,12 @@ static int j1939_sk_connect(struct socket *sock, struct sockaddr *uaddr,
 		goto out_release_sock;
 	}
 
+	/* A connect() to a different interface is not supported. */
+	if (jsk->ifindex != addr->can_ifindex) {
+		ret = -EINVAL;
+		goto out_release_sock;
+	}
+
 	jsk->addr.dst_name = addr->can_addr.j1939.name;
 	jsk->addr.da = addr->can_addr.j1939.addr;
 
-- 
2.20.1