From 2d87a0674bd60d855e4008e2d84f5b23d7cb9b7d Mon Sep 17 00:00:00 2001 From: Ondrej Mosnacek Date: Wed, 10 Apr 2019 11:14:19 +0200 Subject: timekeeping: Audit clock adjustments Emit an audit record whenever the system clock is changed (i.e. shifted by a non-zero offset) by a syscall from userspace. The syscalls than can (at the time of writing) trigger such record are: - settimeofday(2), stime(2), clock_settime(2) -- via do_settimeofday64() - adjtimex(2), clock_adjtime(2) -- via do_adjtimex() The new records have type AUDIT_TIME_INJOFFSET and contain the following fields: - sec -- the 'seconds' part of the offset - nsec -- the 'nanoseconds' part of the offset Example record (time was shifted backwards by ~15.875 seconds): type=TIME_INJOFFSET msg=audit(1530616049.652:13): sec=-16 nsec=124887145 The records of this type will be associated with the corresponding syscall records. Signed-off-by: Ondrej Mosnacek Reviewed-by: Richard Guy Briggs Reviewed-by: Thomas Gleixner [PM: fixed a line width problem in __audit_tk_injoffset()] Signed-off-by: Paul Moore --- include/uapi/linux/audit.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 3901c51c0b93..ab58d67baf4d 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -114,6 +114,7 @@ #define AUDIT_REPLACE 1329 /* Replace auditd if this packet unanswerd */ #define AUDIT_KERN_MODULE 1330 /* Kernel Module events */ #define AUDIT_FANOTIFY 1331 /* Fanotify access decision */ +#define AUDIT_TIME_INJOFFSET 1332 /* Timekeeping offset injected */ #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ -- cgit v1.2.3