From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<linmiaohe@huawei.com>
Subject: [PATCH] mm/mremap:: Use vma_lookup() instead of find_vma()
Date: Sat, 12 Mar 2022 16:31:18 +0800 [thread overview]
Message-ID: <20220312083118.48284-1-linmiaohe@huawei.com> (raw)
Using vma_lookup() verifies the address is contained in the found vma.
This results in easier to read the code.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
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;
}
--
2.23.0
next reply other threads:[~2022-03-12 8:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-12 8:31 Miaohe Lin [this message]
2022-03-14 13:12 ` [PATCH] mm/mremap:: Use vma_lookup() instead of find_vma() David Hildenbrand
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