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- Prevent a futex hash leak due to different mm lifetimes

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Merge tag 'locking_urgent_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fix from Borislav Petkov:

 - Prevent a futex hash leak due to different mm lifetimes

* tag 'locking_urgent_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Move futex cleanup to __mmdrop()
This commit is contained in:
Linus Torvalds 2025-08-10 08:11:39 +03:00
commit 8e8f6b635f
1 changed files with 1 additions and 1 deletions
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2
kernel/fork.c
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@ -689,6 +689,7 @@ void __mmdrop(struct mm_struct *mm)
mm_pasid_drop(mm);
mm_destroy_cid(mm);
percpu_counter_destroy_many(mm->rss_stat, NR_MM_COUNTERS);
futex_hash_free(mm);
free_mm(mm);
}
@ -1137,7 +1138,6 @@ static inline void __mmput(struct mm_struct *mm)
if (mm->binfmt)
module_put(mm->binfmt->module);
lru_gen_del_mm(mm);
futex_hash_free(mm);
mmdrop(mm);
}