ba3ae75b3c
In ip_output(), the flow-table module must not try to cache L2/L3 information for interface of IFF_POINTOPOINT or IFF_LOOPBACK type. Since the L2 information (rt_lle) is invalid for these interface types, accidental caching attempt will trigger panic when the invalid rt_lle reference is accessed. When installing a new route, or when updating an existing route, the user supplied gateway address may be an interface address (this is particularly true for point-to-point interface related modules such as ppp, if_tun, if_gif). Currently the routing command handler always set the RTF_GATEWAY flag if the gateway address is given as part of the command paramters. Therefore the gateway address must be verified against interface addresses or else the route would be treated as an indirect route, thus making that route unusable. Reviewed by: kmacy, julian, rwatson Approved by: re
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