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* Fix user-space data loss with MADV_FREE and THP

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* Fix set_memory oopses
  * Fix addition of large constants in mul_u64_add_u64_div_u64()
  * Fix FineIBT hash offset in cfi_get_func_hash()
  * Fix PCI device reference counting in amd_smn_init()
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Merge tag 'x86_urgent_for_7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Dave Hansen:
 "The most notable fix is THP not silently losing user data and having
  been around for a couple of years. The main explanation I'd have for
  its longevity is that it requires a few different things to align at
  the same time: MADV_FREE, THP and heavy reclaim.

   - Fix user-space data loss with THP

   - Fix set_memory oopses

   - Fix addition of large constants in mul_u64_add_u64_div_u64()

   - Fix FineIBT hash offset in cfi_get_func_hash()

   - Fix PCI device reference counting in amd_smn_init()"

* tag 'x86_urgent_for_7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/amd_node: Fix PCI device reference counting in amd_smn_init()
  x86/div64: Fix addition of large constants in mul_u64_add_u64_div_u64()
  x86/cfi: Fix FineIBT hash offset in cfi_get_func_hash()
  x86/mm: Fix user-space data loss with MADV_FREE and THP
  x86/mm/pat: Allocate split page tables as kernel page tables
  x86/alternatives: Exclude text poking against change_page_attr()
  x86/mm/pat: Acquire init_mm read lock on attribute changes to avoid UAF
  x86/mm/pat: Acquire init_mm write lock on collapse to avoid UAF
This commit is contained in:
Linus Torvalds 2026-09-13 17:50:28 -07:00
commit 704340f1cd
6 changed files with 121 additions and 55 deletions
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