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sched_ext: Fixes for v6.18-rc6 

One low risk and obvious fix:
 
 - scx_enable() was dereferencing error pointer on helper kthread creation
   failure. Fixed.
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Merge tag 'sched_ext-for-6.18-rc6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

Pull sched_ext fix from Tejun Heo:
 "One low risk and obvious fix: scx_enable() was dereferencing an error
  pointer on helper kthread creation failure. Fixed"

* tag 'sched_ext-for-6.18-rc6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
  sched_ext: Fix scx_enable() crash on helper kthread creation failure
pull/1354/merge
Linus Torvalds 2025-11-20 11:04:37 -08:00
parent c966813ea1 7b6216baae
commit fd95357fd8
1 changed files with 4 additions and 1 deletions
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5
kernel/sched/ext.c
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@ -4479,8 +4479,11 @@ static struct scx_sched *scx_alloc_and_add_sched(struct sched_ext_ops *ops)
goto err_free_gdsqs; goto err_free_gdsqs;
sch->helper = kthread_run_worker(0, "sched_ext_helper"); sch->helper = kthread_run_worker(0, "sched_ext_helper");
if (!sch->helper) if (IS_ERR(sch->helper)) {
ret = PTR_ERR(sch->helper);
goto err_free_pcpu; goto err_free_pcpu;
}
sched_set_fifo(sch->helper->task); sched_set_fifo(sch->helper->task);
atomic_set(&sch->exit_kind, SCX_EXIT_NONE); atomic_set(&sch->exit_kind, SCX_EXIT_NONE);