[082/227] mm/mremap:: use vma_lookup() instead of find_vma()

Commit Message

Andrew Morton March 22, 2022, 9:42 p.m. UTC

From: Miaohe Lin <[e-mail]>
Subject: 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/[e-mail]
Signed-off-by: Miaohe Lin <[e-mail]>
Reviewed-by: Andrew Morton <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/mremap.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

--- a/mm/mremap.c~mm-mremap-use-vma_lookup-instead-of-find_vma
+++ a/mm/mremap.c
@@ -942,8 +942,8 @@  SYSCALL_DEFINE5(mremap, unsigned long, a
 
 	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;
 	}