>Number:         13878
>Category:       kern
>Synopsis:       Can't create a union mount as a non-root user; Operation not permitted
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 06 08:18:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Trevin Beattie
>Release:        1.5.1
>Organization:
>Environment:
NetBSD clyde.wh.ca.us 1.5.1 NetBSD 1.5.1 (GENERIC) #56: Mon Jul  2 15:54:23 CEST 2001     he@nsa.uninett.no:/usr/src/sys/arch/i386/compile/GENERIC i386

>Description:
Under 1.4.2 I was able to do a reverse-mount of a source tree below my
own build directory using a command like "mount_union -b /usr/src/sys
$HOME/sys".  On 1.5.1, attempting to do so fails with:
mount_union: /usr/src/sys on /home/trevin/sys: Operation not permitted

root can perform the mount, but then all directories created in the
upper layer would be owned by root, so I wouldn't be able to do a build.

>How-To-Repeat:
cd $HOME
mkdir sys
mount -t union -o -b /usr/src/sys $HOME/sys

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: