svn commit: r363966 - head/sys/vm

[Brooks Davis]

On Thu, Aug 06, 2020 at 04:20:21PM +0000, Brooks Davis wrote:
> Author: brooks
> Date: Thu Aug  6 16:20:20 2020
> New Revision: 363966
> URL: https://svnweb.freebsd.org/changeset/base/363966
> 
> Log:
>   Preserve ASLR vm_map flags across fork
>   
>   In the most common case (fork+execve) this doesn't matter, but further
>   attempts to apply entropy would fail in (e.g.) a pre-fork server.
>   
>   Reported by:	Alfredo Mazzinghi
>   Reviewed by:	kib, markj
>   Obtained from:	CheriBSD
>   MFC after:	3 days
>   Differential Revision:	https://reviews.freebsd.org/D25966

For the record, ASLR is off by default so there will not be a security
advisory on this issue.  If there are enough users who are concerned
about this we will consider an eratta notice for 12.1.

-- Brooks
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