From 059b8b4875b3c046770e4f9fb553ece40b217b40 Mon Sep 17 00:00:00 2001 From: Liam Howlett Date: Mon, 28 Jun 2021 19:39:44 -0700 Subject: [PATCH] mm/migrate: use vma_lookup() in do_pages_stat_array() Use vma_lookup() to find the VMA at a specific address. As vma_lookup() will return NULL if the address is not within any VMA, the start address no longer needs to be validated. Link: https://lkml.kernel.org/r/20210521174745.2219620-20-Liam.Howlett@Oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Laurent Dufour Acked-by: David Hildenbrand Acked-by: Davidlohr Bueso Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/migrate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 41ff2c9..380ca57 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1834,8 +1834,8 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages, struct page *page; int err = -EFAULT; - vma = find_vma(mm, addr); - if (!vma || addr < vma->vm_start) + vma = vma_lookup(mm, addr); + if (!vma) goto set_status; /* FOLL_DUMP to ignore special (like zero) pages */ -- 2.7.4