re: kern/45700: /chroot/proc/mounts exposes out-of-chroot pathnames

[matthew green <mrg%eterna.com.au@localhost>]

The following reply was made to PR kern/45700; it has been noted by GNATS.

From: matthew green <mrg%eterna.com.au@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: re: kern/45700: /chroot/proc/mounts exposes out-of-chroot pathnames
Date: Fri, 09 Dec 2011 20:00:18 +1100

 > Machine: i386
 > >Description:
 > 
 >      If I'm chrooted in /chroot, and I mount procfs on /proc (in the
 >      chroot), then /proc/mounts exposes pathnames from outside the
 >      chroot.
 > 
 > >How-To-Repeat:
 > 
 >      # chroot /chroot
 >      # mount -t procfs procfs /proc
 >      # cat /proc/mounts
 > 
 > >Fix:
 > 
 >      Yes, please!  It's not clear what the right behaviour is, but
 >      perhaps a hack similar to ptyfs's would be appropriate here.
 
 df(1) gets this right.  hopefully we can use what ever it does
 to fix this one...