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Locking fixes:

Browse source 
- Fix FUT_OFF_MMSHARED futex hashing bug that can cause
    missed wakeups or spurious wakeups on futex-waiting
    tasks (Jann Horn)
 
  - Fix lockdep context tracking bug in the deferred hrtimer
    rearming entry code, which causes a lockdep chain leak
    that will eventually turn lockdep off (Mikhail Gavrilov)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-urgent-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fixes from Ingo Molnar:

 - Fix FUT_OFF_MMSHARED futex hashing bug that can cause
   missed wakeups or spurious wakeups on futex-waiting
   tasks (Jann Horn)

 - Fix lockdep context tracking bug in the deferred hrtimer
   rearming entry code, which causes a lockdep chain leak
   that will eventually turn lockdep off (Mikhail Gavrilov)

* tag 'locking-urgent-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  entry: Account the deferred hrtimer rearm as hardirq context for lockdep
  futex: Fix mm reuse handling for FUT_OFF_MMSHARED
This commit is contained in:
Linus Torvalds 2026-10-18 07:03:51 -10:00
commit cf20e7f96a
4 changed files with 62 additions and 33 deletions
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