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From: Glen Barber <gjb@FreeBSD.org>
Date: Sun, 24 Jul 2011 03:34:38 +0000 (UTC)
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Subject: svn commit: r224286 - head/usr.sbin/jail
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Author: gjb (doc committer)
Date: Sun Jul 24 03:34:38 2011
New Revision: 224286
URL: http://svn.freebsd.org/changeset/base/224286

Log:
  Document the potential for jail escape.
  
  Submitted by:	Vedad KAJTAZ (vedad % kajtaz net)
  PR:		142341
  Reviewed by:	bz, rwatson
  Rewording by:	rwatson
  Approved by:	re (kensmith)
  MFC after:	3 days

Modified:
  head/usr.sbin/jail/jail.8

Modified: head/usr.sbin/jail/jail.8
==============================================================================
--- head/usr.sbin/jail/jail.8	Sun Jul 24 01:36:01 2011	(r224285)
+++ head/usr.sbin/jail/jail.8	Sun Jul 24 03:34:38 2011	(r224286)
@@ -34,7 +34,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 17, 2010
+.Dd July 23, 2011
 .Dt JAIL 8
 .Os
 .Sh NAME
@@ -907,3 +907,10 @@ Currently, the simplest answer is to min
 offered on the host, possibly limiting it to services offered from
 .Xr inetd 8
 which is easily configurable.
+.Sh NOTES
+Great care should be taken when managing directories visible within the jail.
+For example, if a jailed process has its current working directory set to a
+directory that is moved out of the jail's chroot, then the process may gain
+access to the file space outside of the jail.
+It is recommended that directories always be copied, rather than moved, out
+of a jail.