arm64/mm: add pud_user_exec() check in pud_user_accessible_page()

commit 730a11f upstream.

Add check for the executable case in pud_user_accessible_page() too
like what we did for pte and pmd.

Fixes: 42b2547 ("arm64/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Link: https://lore.kernel.org/r/20221122123137.429686-1-liushixin2@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm64/include/asm/pgtable.h

@@ -682,7 +682,7 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 #define pud_leaf(pud)		(pud_present(pud) && !pud_table(pud))
 #define pud_valid(pud)		pte_valid(pud_pte(pud))
 #define pud_user(pud)		pte_user(pud_pte(pud))
-
+#define pud_user_exec(pud)	pte_user_exec(pud_pte(pud))
 
 static inline void set_pud(pud_t *pudp, pud_t pud)
 {
@@ -868,7 +868,7 @@ static inline bool pmd_user_accessible_page(pmd_t pmd)
 
 static inline bool pud_user_accessible_page(pud_t pud)
 {
-	return pud_leaf(pud) && pud_user(pud);
+	return pud_leaf(pud) && (pud_user(pud) || pud_user_exec(pud));
 }
 #endif