[merged] mm-memory-failurec-catch-unexpected-efault-from-vma_address.patch removed from -mm tree

[merged] mm-memory-failurec-catch-unexpected-efault-from-vma_address.patch removed from -mm tree

[Andrew Morton]

The patch titled
     Subject: mm/memory-failure.c: catch unexpected -EFAULT from vma_address()
has been removed from the -mm tree.  Its filename was
     mm-memory-failurec-catch-unexpected-efault-from-vma_address.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/memory-failure.c: catch unexpected -EFAULT from vma_address()

It's unexpected to walk the page table when vma_address() return -EFAULT. 
But dev_pagemap_mapping_shift() is called only when vma associated to the
error page is found already in collect_procs_{file,anon}, so vma_address()
should not return -EFAULT except with some bug, as Naoya pointed out.  We
can use VM_BUG_ON_VMA() to catch this bug here.

Link: https://lkml.kernel.org/r/20220218090118.1105-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory-failure.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/memory-failure.c~mm-memory-failurec-catch-unexpected-efault-from-vma_address
+++ a/mm/memory-failure.c
@@ -315,6 +315,7 @@ static unsigned long dev_pagemap_mapping
 	pmd_t *pmd;
 	pte_t *pte;
 
+	VM_BUG_ON_VMA(address == -EFAULT, vma);
 	pgd = pgd_offset(vma->vm_mm, address);
 	if (!pgd_present(*pgd))
 		return 0;
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-huge_memory-make-is_transparent_hugepage-static.patch