tipc: add a bounds check in link_recv_changeover_msg()
The bearer_id here comes from skb->data and it can be a number from 0 to 7. The problem is that the ->links[] array has only 2 elements so I have added a range check. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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