From 21b85c31d23f2047d47e1f74bfa5caa8b75c1c77 Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Thu, 23 May 2013 14:26:00 -0400 Subject: audit: audit feature to set loginuid immutable This adds a new 'audit_feature' bit which allows userspace to set it such that the loginuid is absolutely immutable, even if you have CAP_AUDIT_CONTROL. Signed-off-by: Eric Paris Signed-off-by: Richard Guy Briggs Signed-off-by: Eric Paris --- kernel/auditsc.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/auditsc.c') diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 924c0bf048d2..63223d671a6e 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -1971,6 +1971,9 @@ static int audit_set_loginuid_perm(kuid_t loginuid) /* if we are unset, we don't need privs */ if (!audit_loginuid_set(current)) return 0; + /* if AUDIT_FEATURE_LOGINUID_IMMUTABLE means never ever allow a change*/ + if (is_audit_feature_set(AUDIT_FEATURE_LOGINUID_IMMUTABLE)) + return -EPERM; /* it is set, you need permission */ if (!capable(CAP_AUDIT_CONTROL)) return -EPERM; -- cgit v1.2.3