From: Eric Paris <eparis@parisplace.org>
Date: Fri, 14 Jul 2006 07:24:33 +0000 (-0700)
Subject: [PATCH] Fix security check for joint context= and fscontext= mount options
X-Git-Tag: v2.6.18-rc2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b04ea3cebf79d6808632808072f276dbc98aaf01;p=pandora-kernel.git

[PATCH] Fix security check for joint context= and fscontext= mount options

After some discussion on the actual meaning of the filesystem class
security check in try context mount it was determined that the checks for
the context= mount options were not correct if fscontext mount option had
already been used.

When labeling the superblock we should be checking relabel_from and
relabel_to.  But if the superblock has already been labeled (with
fscontext) then context= is actually labeling the inodes, and so we should
be checking relabel_from and associate.  This patch fixes which checks are
called depending on the mount options.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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