SELinux: create new open permission

Adds a new open permission inside SELinux when 'opening' a file.  The idea
is that opening a file and reading/writing to that file are not the same
thing.  Its different if a program had its stdout redirected to /tmp/output
than if the program tried to directly open /tmp/output. This should allow
policy writers to more liberally give read/write permissions across the
policy while still blocking many design and programing flaws SELinux is so
good at catching today.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Reviewed-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 44e12ec88090..315b4ec1e12a 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -48,11 +48,13 @@ extern int selinux_mls_enabled;
 /* Policy capabilities */
 enum {
         POLICYDB_CAPABILITY_NETPEER,
+        POLICYDB_CAPABILITY_OPENPERM,
         __POLICYDB_CAPABILITY_MAX
 };
 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
 
 extern int selinux_policycap_netpeer;
+extern int selinux_policycap_openperm;
 
 int security_load_policy(void * data, size_t len);