From 2c861cc65ef4604011a0082e4dcdba2819aa191a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michal=20Kube=C4=8Dek?= <mkubecek@suse.cz>
Date: Mon, 9 Sep 2013 21:45:04 +0200
Subject: [PATCH] ipv6: don't call fib6_run_gc() until routing is ready

When loading the ipv6 module, ndisc_init() is called before
ip6_route_init(). As the former registers a handler calling
fib6_run_gc(), this opens a window to run the garbage collector
before necessary data structures are initialized. If a network
device is initialized in this window, adding MAC address to it
triggers a NETDEV_CHANGEADDR event, leading to a crash in
fib6_clean_all().

Take the event handler registration out of ndisc_init() into a
separate function ndisc_late_init() and move it after
ip6_route_init().

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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