1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index a4d9e14bf138..35f3ea375084 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2007,6 +2007,10 @@ static u64 numa_get_avg_runtime(struct task_struct *p, u64 *period)
         if (p->last_task_numa_placement) {
                 delta = runtime - p->last_sum_exec_runtime;
                 *period = now - p->last_task_numa_placement;
+
+                /* Avoid time going backwards, prevent potential divide error: */
+                if (unlikely((s64)*period < 0))
+                        *period = 0;
         } else {
                 delta = p->se.avg.load_sum;
                 *period = LOAD_AVG_MAX;