Insta-panic for amd64 on reboot after upgrade from r320307 -> r320324

[Konstantin Belousov]

On Sun, Jun 25, 2017 at 05:47:48AM -0700, David Wolfskill wrote:
> On Sun, Jun 25, 2017 at 03:32:26PM +0300, Konstantin Belousov wrote:
> > On Sun, Jun 25, 2017 at 05:07:31AM -0700, David Wolfskill wrote:
> > > Fatal trap 12: page fault while in kernel mode
> > > cpuid = 0; apic id = 00
> > > fault virtual address   = 0x10000000020
> > This is clearly an impossible address.
> > 
> > Did you built the kernel with NO_CLEAN ?  If yes, try the full build,
> > perhaps even after removing all previous kernel objects.
> 
> No; I stopped using NO_CLEAN by 12 March 2016, in favor of filemon and
> WITH_FAST_DEPEND.  I have been doing daily builds & smoke-tests of
> head/amd64 since then.  (Well, I was also doing them before then,
> as well....)
> 
> > The layout of the struct vm_map_entry was changed, the faulted address
> > is somewhat consistent with ABI mismatch.
> 
> Kinky. :-}
Do you use any third-party modules ?