From 0e6799db9672dcdc995b0f4bfa5cde4420868c93 Mon Sep 17 00:00:00 2001
From: Miaohe Lin <linmiaohe@huawei.com>
Date: Tue, 22 Mar 2022 14:42:41 -0700
Subject: [PATCH] mm/mremap:: use vma_lookup() instead of find_vma()

Using vma_lookup() verifies the address is contained in the found vma.
This results in easier to read code.

Link: https://lkml.kernel.org/r/20220312083118.48284-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/mremap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index 002eec83e91e..9d76da79594d 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -942,8 +942,8 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
 
 	if (mmap_write_lock_killable(current->mm))
 		return -EINTR;
-	vma = find_vma(mm, addr);
-	if (!vma || vma->vm_start > addr) {
+	vma = vma_lookup(mm, addr);
+	if (!vma) {
 		ret = EFAULT;
 		goto out;
 	}