[RFC] sepgsql: prohibit users to relabel objects

Enforce access control on security labels defined by admin
and prohibit users to relabel the objects

Signed-off-by: Denis Kirjanov <kda(at)itsirius(dot)su>
---
contrib/sepgsql/label.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/contrib/sepgsql/label.c b/contrib/sepgsql/label.c
index ef7661c..470b90e 100644
--- a/contrib/sepgsql/label.c
+++ b/contrib/sepgsql/label.c
@@ -504,6 +504,11 @@ sepgsql_object_relabel(const ObjectAddress *object, const char *seclabel)
(errcode(ERRCODE_INVALID_NAME),
errmsg("SELinux: invalid security label: \"%s\"", seclabel)));

+ if (!superuser())
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("SELinux: must be superuser to relabel objects")));
+
/*
* Do actual permission checks for each object classes
*/
--
1.7.10.4