From mrl@teleport.com (Mostyn R. Lewis)

From mrl@teleport.com (Mostyn R. Lewis)
>PPP and SLIP users - deleting a route can be deadly!
>
>Yes this can cause a kernel page fault or random hang.
...
>you stand a good chance of a kernel page fault or a random hang because
>the routing table for default still has a pointer to the deleted kernel
>ifaddr structure. Depending on the re-use state of that memory you live
>or die. Death is caused by a function pointer dereference.
>
>A fix for this, in route.c (/usr/src/sys/net) is to scan the linked list
>of ifaddr entries for the interface to see if the pointer is still valid.
>The diffs for the fix are appended. There are two versions; mute and
>verbose. The verbose fix prints information the the system log to verify
>states.