From c793bbfc4a0a9f5a66978fc91559e9681748dbeb Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 18 Aug 2026 00:14:57 +0200 Subject: timer: Keep debugobjects state consistent in migrate_timer_list() When timers are migrated away from an offline CPU the debugobjects state gets corrupted. The timer is accounted as inactive on deletion, but the enqueue on the alive CPU lacks the activation call. That used to work, but got broken when the trace point and the debug objects call got separated. That change missed to fixup migrate_timer_list(). Add the missing debug_timer_activate() invocation to fix it. Fixes: dc1e7dc5ac62 ("timer: Move trace point to get proper index") Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://patch.msgid.link/87bjb0l7ha.ffs@fw13 --- kernel/time/timer.c | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel') diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 655a8c6cd84d..ae9abf14688e 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -2492,6 +2492,7 @@ static void migrate_timer_list(struct timer_base *new_base, struct hlist_head *h timer = hlist_entry(head->first, struct timer_list, entry); detach_timer(timer, false); timer->flags = (timer->flags & ~TIMER_BASEMASK) | cpu; + debug_timer_activate(timer); internal_add_timer(new_base, timer); } } -- cgit v1.2.3