From 03506edca637a8465dba9f635c50e9884fbcaf4e Mon Sep 17 00:00:00 2001 From: fangqiurong Date: Fri, 14 Aug 2026 11:26:23 +0800 Subject: sched_ext: Fix exit_task leak on fork failure during enable scx_fork() initializes tasks when scx_init_task_enabled is set, but scx_cancel_fork() only exits them when scx_enabled() is true. A fork that fails in the enable window (between releasing scx_fork_rwsem and setting __scx_enabled) runs ops.init_task() but never ops.exit_task(). Gate scx_cancel_fork() on scx_init_task_enabled. Fixes: 4269c603cc26 ("sched_ext: Enable scx_ops_init_task() separately") Cc: stable@vger.kernel.org # v6.12+ Signed-off-by: fangqiurong Signed-off-by: Tejun Heo --- kernel/sched/ext/ext.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel') diff --git a/kernel/sched/ext/ext.c b/kernel/sched/ext/ext.c index 61b156d7fc4b..2adf2bde0cb1 100644 --- a/kernel/sched/ext/ext.c +++ b/kernel/sched/ext/ext.c @@ -4163,7 +4163,7 @@ void scx_post_fork(struct task_struct *p) void scx_cancel_fork(struct task_struct *p) { - if (scx_enabled()) { + if (scx_init_task_enabled) { struct rq *rq; struct rq_flags rf; -- cgit v1.2.3