svn commit: r339646 - head/sys/net

[Kristof Provost]

> On 23 Oct 2018, at 06:03, Andrey V. Elsukov <ae at FreeBSD.org> wrote:
> 
> Author: ae
> Date: Tue Oct 23 13:03:03 2018
> New Revision: 339646
> URL: https://svnweb.freebsd.org/changeset/base/339646
> 
> Log:
>  Add the check that current VNET is ready and access to srchash is
>  allowed.
> 
>  ipsec_srcaddr() callback can be called during VNET teardown, since
>  ingress address checking subsystem isn't VNET specific. And thus
>  callback can make access to already freed memory. To prevent this,
>  use V_ipsec_idhtbl pointer as indicator of VNET readiness. And make
>  epoch_wait() after resetting it to NULL in vnet_ipsec_uninit() to
>  be sure that ipsec_srcaddr() is finished its work.
> 
>  Reported by:    kp
>  MFC after:    20 days
> 
Thanks for the fix. 

Kristof