tipc: Ignore neighbor discovery messages containing invalid address
Adds a check to ensure that TIPC ignores an incoming neighbor discovery
message that specifies an invalid media address as its source. The check
ensures that the source address is a valid, non-broadcast address that
could legally be used by a neighboring link endpoint.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 1ea2d44..420e032 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -130,12 +130,15 @@
u32 type = msg_type(msg);
int link_fully_up;
+ media_addr.broadcast = 1;
b_ptr->media->msg2addr(&media_addr, msg_media_addr(msg));
buf_discard(buf);
/* Validate discovery message from requesting node */
if (net_id != tipc_net_id)
return;
+ if (media_addr.broadcast)
+ return;
if (!tipc_addr_domain_valid(dest))
return;
if (!tipc_addr_node_valid(orig))