From 46e6b31d4617612e47daeb7b4b6350b116349f6d Mon Sep 17 00:00:00 2001 From: Liam Howlett Date: Mon, 28 Jun 2021 19:39:38 -0700 Subject: [PATCH] lib/test_hmm: use vma_lookup() in dmirror_migrate() 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/20210521174745.2219620-18-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 --- lib/test_hmm.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/lib/test_hmm.c b/lib/test_hmm.c index 80a7887..15f2e2d 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -686,9 +686,8 @@ static int dmirror_migrate(struct dmirror *dmirror, mmap_read_lock(mm); for (addr = start; addr < end; addr = next) { - vma = find_vma(mm, addr); - if (!vma || addr < vma->vm_start || - !(vma->vm_flags & VM_READ)) { + vma = vma_lookup(mm, addr); + if (!vma || !(vma->vm_flags & VM_READ)) { ret = -EINVAL; goto out; } -- 2.7.4