svn commit: r292275 - in head/sys: net netinet netinet6

[Kristof Provost]

> On 15 Dec 2015, at 23:15, Kristof Provost <kp at FreeBSD.org> wrote:
> Based on the arp_announce() in the backtrace this commit looks like a possible cause.
I see this in arp_announce(): 
KP: arp_announce() ifp->if_addr = 0

So that explains why we panic in 'lladdr = IF_LLADDR(ifp);’.

I’ve done a very quick hack:
diff --git a/sys/netinet/if_ether.c b/sys/netinet/if_ether.c
index 2214542..9b25356 100644
--- a/sys/netinet/if_ether.c
+++ b/sys/netinet/if_ether.c
@@ -1246,9 +1246,15 @@ arp_announce(struct ifnet *ifp)
        }
        IF_ADDR_RUNLOCK(ifp);

-       lladdr = IF_LLADDR(ifp);
-       for (i = 0; i < cnt; i++) {
-               arp_announce_addr(ifp, head + i, lladdr);
+       printf("KP: %s() ifp = %p\n", __FUNCTION__, ifp);
+       printf("KP: %s() ifp->if_addr = %p\n", __FUNCTION__, ifp->if_addr);
+
+       if (ifp->if_addr) {
+               printf("KP: %s() ifp->if_addr->ifa_addr = %p\n", __FUNCTION__, ifp->if_addr->ifa_addr);
+               lladdr = IF_LLADDR(ifp);
+               for (i = 0; i < cnt; i++) {
+                       arp_announce_addr(ifp, head + i, lladdr);
+               }
        }
        free(head, M_TEMP);
 }

With this patch the device boots. I haven’t been able to verify if everything works because of a different issue ("Shared object "lib80211.so.1" not found, required by “ifconfig””, no doubt just a small problem with the freebsd-wifi-build scripts).

Regards,
Kristof