linux/security/selinux/ss
KaiGai Kohei 8a6f83afd0 Permissive domain in userspace object manager
This patch enables applications to handle permissive domain correctly.

Since the v2.6.26 kernel, SELinux has supported an idea of permissive
domain which allows certain processes to work as if permissive mode,
even if the global setting is enforcing mode.
However, we don't have an application program interface to inform
what domains are permissive one, and what domains are not.
It means applications focuses on SELinux (XACE/SELinux, SE-PostgreSQL
and so on) cannot handle permissive domain correctly.

This patch add the sixth field (flags) on the reply of the /selinux/access
interface which is used to make an access control decision from userspace.
If the first bit of the flags field is positive, it means the required
access control decision is on permissive domain, so application should
allow any required actions, as the kernel doing.

This patch also has a side benefit. The av_decision.flags is set at
context_struct_compute_av(). It enables to check required permissions
without read_lock(&policy_rwlock).

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Eric Paris <eparis@redhat.com>
--
 security/selinux/avc.c              |    2 +-
 security/selinux/include/security.h |    4 +++-
 security/selinux/selinuxfs.c        |    4 ++--
 security/selinux/ss/services.c      |   30 +++++-------------------------
 4 files changed, 11 insertions(+), 29 deletions(-)
Signed-off-by: James Morris <jmorris@namei.org>
2009-04-02 09:23:45 +11:00
..
avtab.c selinux: Unify for- and while-loop style 2008-08-15 08:40:47 +10:00
avtab.h SELinux: add more validity checks on policy load 2007-11-08 08:56:23 +11:00
conditional.c selinux: Unify for- and while-loop style 2008-08-15 08:40:47 +10:00
conditional.h selinux: conditional expression type validation was off-by-one 2008-08-07 08:56:16 +10:00
constraint.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
context.h SELinux: shrink sizeof av_inhert selinux_class_perm and context 2009-01-05 19:19:55 +11:00
ebitmap.c selinux: Unify for- and while-loop style 2008-08-15 08:40:47 +10:00
ebitmap.h SELinux: kills warnings in Improve SELinux performance when AVC misses 2007-10-17 08:59:36 +10:00
hashtab.c selinux: Unify for- and while-loop style 2008-08-15 08:40:47 +10:00
hashtab.h SELinux: hashtab.h whitespace, syntax, and other cleanups 2008-04-28 09:29:04 +10:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mls_types.h SELinux: mls_types.h whitespace, syntax, and other cleanups 2008-04-28 09:29:06 +10:00
mls.c SELinux: Trivial minor fixes that change C null character style 2008-08-05 10:55:30 +10:00
mls.h selinux: support deferred mapping of contexts 2008-07-14 15:01:34 +10:00
policydb.c SELinux: add boundary support and thread context assignment 2008-08-29 00:33:33 +10:00
policydb.h SELinux: add boundary support and thread context assignment 2008-08-29 00:33:33 +10:00
services.c Permissive domain in userspace object manager 2009-04-02 09:23:45 +11:00
services.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sidtab.c selinux: Unify for- and while-loop style 2008-08-15 08:40:47 +10:00
sidtab.h selinux: support deferred mapping of contexts 2008-07-14 15:01:34 +10:00
symtab.c SELinux: ensure keys constant in hashtab_search 2006-11-28 12:04:37 -05:00
symtab.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00