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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>
This commit is contained in:
Allan Stephens 2011-10-07 15:48:41 -04:00 committed by Paul Gortmaker
parent 3d749a6a26
commit d6d4577ae4
1 changed files with 3 additions and 0 deletions
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3
net/tipc/discover.c
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@ -130,12 +130,15 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr)
u32 type = msg_type(msg); u32 type = msg_type(msg);
int link_fully_up; int link_fully_up;
media_addr.broadcast = 1;
b_ptr->media->msg2addr(&media_addr, msg_media_addr(msg)); b_ptr->media->msg2addr(&media_addr, msg_media_addr(msg));
buf_discard(buf); buf_discard(buf);
/* Validate discovery message from requesting node */ /* Validate discovery message from requesting node */
if (net_id != tipc_net_id) if (net_id != tipc_net_id)
return; return;
if (media_addr.broadcast)
return;
if (!tipc_addr_domain_valid(dest)) if (!tipc_addr_domain_valid(dest))
return; return;
if (!tipc_addr_node_valid(orig)) if (!tipc_addr_node_valid(orig))