@@ -64,6 +64,18 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
new_pmd = pmd_alloc(mm, new_pud, 0);
if (!new_pmd)
goto no_pmd;
+#ifdef CONFIG_KASAN
+ /*
+ *Copy PMD table for KASAN shadow mappings.
+ */
+ init_pgd = pgd_offset_k(TASK_SIZE);
+ init_pud = pud_offset(init_pgd, TASK_SIZE);
+ init_pmd = pmd_offset(init_pud, TASK_SIZE);
+ new_pmd = pmd_offset(new_pud,TASK_SIZE);
+ memcpy(new_pmd, init_pmd, (pmd_index(MODULES_VADDR)-pmd_index(TASK_SIZE)) * sizeof(pmd_t));
+ clean_dcache_area(new_pmd,PTRS_PER_PMD*sizeof(pmd_t));
+#endif
+
#endif
if (!vectors_high()) {