From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 12 Jan 2023 22:39:43 +0000 (-0600)
Subject: Merge tag 'sched-urgent-2023-01-12' of git://git.kernel.org/pub/scm/linux/kernel... 
X-Git-Tag: v6.6.7~3755
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ea66bf86536d4d98932843896e9d940110a06701;p=platform%2Fkernel%2Flinux-starfive.git

Merge tag 'sched-urgent-2023-01-12' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:

 - Fix scheduler frequency invariance bug related to overly long
   tickless periods triggering an integer overflow and disabling the
   feature.

 - Fix use-after-free bug in dup_user_cpus_ptr().

 - Fix do_set_cpus_allowed() deadlock scenarios related to calling
   kfree() with the pi_lock held. NOTE: the rcu_free() is the 'lazy'
   solution here - we looked at patches to free the structure after the
   pi_lock got dropped, but that looked quite a bit messier - and none
   of this is truly performance critical. We can revisit this if it's
   too lazy of a solution ...

* tag 'sched-urgent-2023-01-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Use kfree_rcu() in do_set_cpus_allowed()
  sched/core: Fix use-after-free bug in dup_user_cpus_ptr()
  sched/core: Fix arch_scale_freq_tick() on tickless systems
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ea66bf86536d4d98932843896e9d940110a06701