Messages in this thread | | | Date | Fri, 23 Apr 2021 13:27:08 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH v25 20/30] mm/mprotect: Exclude shadow stack from preserve_write |
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On Thu, Apr 15, 2021 at 03:14:09PM -0700, Yu-cheng Yu wrote: > In change_pte_range(), when a PTE is changed for prot_numa, _PAGE_RW is > preserved to avoid the additional write fault after the NUMA hinting fault. > However, pte_write() now includes both normal writable and shadow stack > (RW=0, Dirty=1) PTEs, but the latter does not have _PAGE_RW and has no need > to preserve it. > > Exclude shadow stack from preserve_write test, and apply the same change to > change_huge_pmd(). > > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
-- Kirill A. Shutemov
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