Merge tag 'timers-urgent-2024-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fix from Ingo Molnar:
 "Fix possible (but unlikely) out-of-bounds access in the timer
  migration per-CPU-init code"

* tag 'timers-urgent-2024-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers/migration: Prevent out of bounds access on failure

Author: torvalds

kernel/time/timer_migration.c

@@ -1596,7 +1596,7 @@ static int tmigr_setup_groups(unsigned int cpu, unsigned int node)
 
 	} while (i < tmigr_hierarchy_levels);
 
-	do {
+	while (i > 0) {
 		group = stack[--i];
 
 		if (err < 0) {
@@ -1645,7 +1645,7 @@ static int tmigr_setup_groups(unsigned int cpu, unsigned int node)
 				tmigr_connect_child_parent(child, group);
 			}
 		}
-	} while (i > 0);
+	}
 
 	kfree(stack);