RELENG_6 weird '..' permission troubles

[Yar Tikhiy]

On Sun, Feb 19, 2006 at 01:27:48PM +0100, Nicolas Rachinsky wrote:
> * Yar Tikhiy <yar at comp.chem.msu.su> [2006-02-19 13:58 +0300]:
> > This looks like a file-a-PR case if you are sure you didn't overlook
> > anything.  To the best of my knowledge, the underlying mount point
> > permissions should affect nothing since the FS was mounted.  But
> > you didn't show us output from "ls -la /" so please judge by yourself.
> 
> This behaviour is known and documented.
> 
> http://www.freebsd.org/cgi/man.cgi?query=mount&apropos=0&sektion=0&manpath=FreeBSD+6.0-RELEASE+and+Ports&format=html
> 
>      After a successful mount, the permissions on the original mount point
>      determine if .. is accessible from the mounted file system.  The minimum
>      permissions for the mount point for traversal across the mount point in
>      both directions to be possible for all users is 0111 (execute for all).

Thanks for pointing us out at this.  To my shame, I read about the
caveat some years ago, but then forgot about it completely because
had never run into it in my practice.

-- 
Yar