Commit 531037a0 authored by Miaohe Lin's avatar Miaohe Lin Committed by Linus Torvalds
Browse files

mm/madvise: use vma_lookup() instead of find_vma() 

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

Link: https://lkml.kernel.org/r/20220311082731.63513-1-linmiaohe@huawei.com


Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent da358d5c

mm/madvise.c

+2 −2
Original line number Diff line number Diff line
@@ -849,8 +849,8 @@ static long madvise_populate(struct vm_area_struct *vma, 
		 * our VMA might have been split.

		 */

		if (!vma || start >= vma->vm_end) {

			vma = find_vma(mm, start);

			if (!vma || start < vma->vm_start)

			vma = vma_lookup(mm, start);

			if (!vma)

				return -ENOMEM;

		}