Merge tag 'timers-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull misc timer fixes from Ingo Molnar:

 - Fix timekeeping locking order bug in the timekeeping init code
   (Mikhail Gavrilov)

 - Fix u64 multiplication bug in the posix-cpu-timers code on 32-bit
   kernels (Zhan Xusheng)

 - Fix macro name in comment block (Ethan Nelson-Moore)

 - Fix off-by-one bug in the compat settimeofday() usecs validation code
   (Wang Yan)

* tag 'timers-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time: Fix off-by-one in compat settimeofday() usec validation
  hrtimer: Correct CONFIG_NO_HZ_COMMON macro name in comment
  posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()
  timekeeping: Register default clocksource before taking tk_core.lock

4 files changed, 7 insertions, 6 deletions

diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 638ce623c342..313dcea127fe 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -799,7 +799,7 @@ static inline void hrtimer_switch_to_hres(void) { }
  *
  * This is only invoked when:
  *	- CONFIG_HIGH_RES_TIMERS is enabled.
- *	- CONFIG_NOHZ_COMMON is enabled
+ *	- CONFIG_NO_HZ_COMMON is enabled
  *
  * For the other cases this function is empty and because the call sites
  * are optimized out it vanishes as well, i.e. no need for lots of
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 74775b94d11b..5e633d8750d1 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -41,7 +41,7 @@ void posix_cputimers_group_init(struct posix_cputimers *pct, u64 cpu_limit)
  */
 int update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new)
 {
-	u64 nsecs = rlim_new * NSEC_PER_SEC;
+	u64 nsecs = (u64)rlim_new * NSEC_PER_SEC;
 	unsigned long irq_fl;
 
 	if (!lock_task_sighand(task, &irq_fl))
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 771cef87ad3b..0dd63a91e7c5 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -251,7 +251,7 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv,
 		    get_user(new_ts.tv_nsec, &tv->tv_usec))
 			return -EFAULT;
 
-		if (new_ts.tv_nsec > USEC_PER_SEC || new_ts.tv_nsec < 0)
+		if (new_ts.tv_nsec >= USEC_PER_SEC || new_ts.tv_nsec < 0)
 			return -EINVAL;
 
 		new_ts.tv_nsec *= NSEC_PER_USEC;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 0d5b67f609bb..b1b5ec43c0f2 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2061,13 +2061,14 @@ void __init timekeeping_init(void)
 	 */
 	wall_to_mono = timespec64_sub(boot_offset, wall_time);
 
+	clock = clocksource_default_clock();
+	if (clock->enable)
+		clock->enable(clock);
+
 	guard(raw_spinlock_irqsave)(&tk_core.lock);
 
 	ntp_init();
 
-	clock = clocksource_default_clock();
-	if (clock->enable)
-		clock->enable(clock);
 	tk_setup_internals(tks, clock);
 
 	tk_set_xtime(tks, &wall_time);