From efeeaac9ae9763f9c953e69633c86bc3031e39b5 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 9 Oct 2025 13:56:23 -1000 Subject: [PATCH] sched_ext: Sync error_irq_work before freeing scx_sched By the time scx_sched_free_rcu_work() runs, the scx_sched is no longer reachable. However, a previously queued error_irq_work may still be pending or running. Ensure it completes before proceeding with teardown. Fixes: bff3b5aec1b7 ("sched_ext: Move disable machinery into scx_sched") Acked-by: Andrea Righi Signed-off-by: Tejun Heo --- kernel/sched/ext.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index fc353b8d69f7..a79dfd0f743a 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -3471,7 +3471,9 @@ static void scx_sched_free_rcu_work(struct work_struct *work) struct scx_dispatch_q *dsq; int node; + irq_work_sync(&sch->error_irq_work); kthread_stop(sch->helper->task); + free_percpu(sch->pcpu); for_each_node_state(node, N_POSSIBLE) -- 2.47.3