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A single fix for POSIX CPU timers to address a problem where POSIX CPU

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timer delivery stops working for a new child task because copy_process()
 copies state information which is only valid for the parent task.
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Merge tag 'timers-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A single fix for POSIX CPU timers to address a problem where POSIX CPU
  timer delivery stops working for a new child task because
  copy_process() copies state information which is only valid for the
  parent task"

* tag 'timers-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  posix-cpu-timers: Clear task::posix_cputimers_work in copy_process()
This commit is contained in:
Linus Torvalds 2021-11-14 10:43:38 -08:00
commit 622c72b651
3 changed files with 20 additions and 2 deletions
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1
kernel/fork.c
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@ -2277,6 +2277,7 @@ static __latent_entropy struct task_struct *copy_process(
p->pdeath_signal = 0;
INIT_LIST_HEAD(&p->thread_group);
p->task_works = NULL;
clear_posix_cputimers_work(p);
#ifdef CONFIG_KRETPROBES
p->kretprobe_instances.first = NULL;