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Prevent cond_resched() based preemption when interrupts are disabled,

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on PREEMPT_NONE and PREEMPT_VOLUNTARY kernels.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2025-02-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "Prevent cond_resched() based preemption when interrupts are disabled,
  on PREEMPT_NONE and PREEMPT_VOLUNTARY kernels"

* tag 'sched-urgent-2025-02-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Prevent rescheduling when interrupts are disabled
This commit is contained in:
Linus Torvalds 2025-02-28 17:00:16 -08:00
commit d203484f25
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/core.c
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@ -7285,7 +7285,7 @@ out_unlock:
#if !defined(CONFIG_PREEMPTION) || defined(CONFIG_PREEMPT_DYNAMIC)
int __sched __cond_resched(void)
{
if (should_resched(0)) {
if (should_resched(0) && !irqs_disabled()) {
preempt_schedule_common();
return 1;
}