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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

 kernel/arch/xtensa/mm/tlb.c
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@@ -169,6 +169,8 @@
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 	struct task_struct *task = get_current();
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 	struct mm_struct *mm = task->mm;
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 	pgd_t *pgd;
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+	p4d_t *p4d;
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+	pud_t *pud;
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 	pmd_t *pmd;
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 	pte_t *pte;
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@@ -177,7 +179,13 @@
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 	pgd = pgd_offset(mm, vaddr);
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 	if (pgd_none_or_clear_bad(pgd))
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 		return 0;
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-	pmd = pmd_offset(pgd, vaddr);
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+	p4d = p4d_offset(pgd, vaddr);
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+	if (p4d_none_or_clear_bad(p4d))
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+		return 0;
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+	pud = pud_offset(p4d, vaddr);
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+	if (pud_none_or_clear_bad(pud))
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+		return 0;
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+	pmd = pmd_offset(pud, vaddr);
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 	if (pmd_none_or_clear_bad(pmd))
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 		return 0;
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 	pte = pte_offset_map(pmd, vaddr);