tipc: properly handle off-node send requests with invalid addr

There are two send routines that might conceivably be asked by an
application to send a message off-node when the node is still using
the default network address.  These now have an added check that
detects this and rejects the message gracefully.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/net/tipc/port.c b/net/tipc/port.c
index 616c72fb9234..dc7f916b2e10 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -1270,10 +1270,14 @@ int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
                 if (likely(destnode == tipc_own_addr))
                         res = tipc_port_recv_sections(p_ptr, num_sect,
                                                       msg_sect, total_len);
-                else
+                else if (tipc_own_addr)
                         res = tipc_link_send_sections_fast(p_ptr, msg_sect,
                                                            num_sect, total_len,
                                                            destnode);
+                else
+                        res = tipc_port_reject_sections(p_ptr, msg, msg_sect,
+                                                        num_sect, total_len,
+                                                        TIPC_ERR_NO_NODE);
                 if (likely(res != -ELINKCONG)) {
                         if (res > 0)
                                 p_ptr->sent++;
@@ -1314,9 +1318,12 @@ int tipc_send2port(u32 ref, struct tipc_portid const *dest,
         if (dest->node == tipc_own_addr)
                 res =  tipc_port_recv_sections(p_ptr, num_sect, msg_sect,
                                                total_len);
-        else
+        else if (tipc_own_addr)
                 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
                                                    total_len, dest->node);
+        else
+                res = tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
+                                                total_len, TIPC_ERR_NO_NODE);
         if (likely(res != -ELINKCONG)) {
                 if (res > 0)
                         p_ptr->sent++;