Since pxd_clear_bad() is an operation changing the state of the page tables, we should call arch_sync_kernel_mappings() post this.
Fixes: e80d3909be42 ("mm: track page table modifications in __apply_to_page_range()") Cc: stable@vger.kernel.org Signed-off-by: Dev Jain dev.jain@arm.com --- mm/memory.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/mm/memory.c b/mm/memory.c index 78c7ee62795e..9a4a8c710be0 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2987,6 +2987,7 @@ static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud, if (!create) continue; pmd_clear_bad(pmd); + *mask = PGTBL_PMD_MODIFIED; } err = apply_to_pte_range(mm, pmd, addr, next, fn, data, create, mask); @@ -3023,6 +3024,7 @@ static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d, if (!create) continue; pud_clear_bad(pud); + *mask = PGTBL_PUD_MODIFIED; } err = apply_to_pmd_range(mm, pud, addr, next, fn, data, create, mask); @@ -3059,6 +3061,7 @@ static int apply_to_p4d_range(struct mm_struct *mm, pgd_t *pgd, if (!create) continue; p4d_clear_bad(p4d); + *mask = PGTBL_P4D_MODIFIED; } err = apply_to_pud_range(mm, p4d, addr, next, fn, data, create, mask); @@ -3095,6 +3098,7 @@ static int __apply_to_page_range(struct mm_struct *mm, unsigned long addr, if (!create) continue; pgd_clear_bad(pgd); + mask = PGTBL_PGD_MODIFIED; } err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, create, &mask);