[RFC PATCH ghak10 3/3] ntp: Audit valid attempts to adjust the clock
(Intentionally not sending to the timekeeping/ntp maintainers just yet,
let's settle on the record contents/format first.)
Signed-off-by: Ondrej Mosnacek <omosnace(a)redhat.com>
---
kernel/time/ntp.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index a09ded765f6c..78a01df0dbdb 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/math64.h>
+#include <linux/audit.h>
#include "ntp_internal.h"
#include "timekeeping_internal.h"
@@ -722,6 +723,16 @@ int __do_adjtimex(struct timex *txc, struct timespec64 *ts, s32
*time_tai)
{
int result;
+ /* Only log audit event if the clock was changed/attempted to be changed.
+ * Based on the logic inside timekeeping_validate_timex().
+ * NOTE: We need to log the event before any of the fields get
+ * overwritten by the output values (the function will not fail, so it
+ * is OK). */
+ if ( ( (txc->modes & ADJ_ADJTIME) && !(txc->modes &
ADJ_OFFSET_READONLY))
+ || (!(txc->modes & ADJ_ADJTIME) && txc->modes)
+ || (txc->modes & ADJ_SETOFFSET))
+ audit_adjtime(txc);
+
if (txc->modes & ADJ_ADJTIME) {
long save_adjust = time_adjust;
--
2.17.1