[PATCH 4.14 46/52] audit: ensure that audit=1 actually enables audit for PID 1

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paul Moore <paul@xxxxxxxxxxxxxx>


[ Upstream commit 173743dd99a49c956b124a74c8aacb0384739a4c ]

Prior to this patch we enabled audit in audit_init(), which is too
late for PID 1 as the standard initcalls are run after the PID 1 task
is forked.  This means that we never allocate an audit_context (see
audit_alloc()) for PID 1 and therefore miss a lot of audit events
generated by PID 1.

This patch enables audit as early as possible to help ensure that when
PID 1 is forked it can allocate an audit_context if required.

Reviewed-by: Richard Guy Briggs <rgb@xxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 kernel/audit.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -85,13 +85,13 @@ static int	audit_initialized;
 #define AUDIT_OFF	0
 #define AUDIT_ON	1
 #define AUDIT_LOCKED	2
-u32		audit_enabled;
-u32		audit_ever_enabled;
+u32		audit_enabled = AUDIT_OFF;
+u32		audit_ever_enabled = !!AUDIT_OFF;
 
 EXPORT_SYMBOL_GPL(audit_enabled);
 
 /* Default state when kernel boots without any parameters. */
-static u32	audit_default;
+static u32	audit_default = AUDIT_OFF;
 
 /* If auditing cannot proceed, audit_failure selects what happens. */
 static u32	audit_failure = AUDIT_FAIL_PRINTK;
@@ -1552,8 +1552,6 @@ static int __init audit_init(void)
 	register_pernet_subsys(&audit_net_ops);
 
 	audit_initialized = AUDIT_INITIALIZED;
-	audit_enabled = audit_default;
-	audit_ever_enabled |= !!audit_default;
 
 	kauditd_task = kthread_run(kauditd_thread, NULL, "kauditd");
 	if (IS_ERR(kauditd_task)) {
@@ -1575,6 +1573,8 @@ static int __init audit_enable(char *str
 	audit_default = !!simple_strtol(str, NULL, 0);
 	if (!audit_default)
 		audit_initialized = AUDIT_DISABLED;
+	audit_enabled = audit_default;
+	audit_ever_enabled = !!audit_enabled;
 
 	pr_info("%s\n", audit_default ?
 		"enabled (after initialization)" : "disabled (until reboot)");