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sched_ext: Fix exit_task leak on fork failure during enable

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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: 4269c603cc ("sched_ext: Enable scx_ops_init_task() separately")
Cc: stable@vger.kernel.org # v6.12+
Signed-off-by: fangqiurong <fangqiurong@kylinos.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
fangqiurong
2026-08-14 09:17:01 -10:00
committed by Tejun Heo
parent 1d0a73dd0c
commit 03506edca6
1 changed files with 1 additions and 1 deletions
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kernel/sched/ext/ext.c
+1 -1
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@@ -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;