From: Liam R. Howlett <Liam.Howlett@oracle.com>
Date: Mon, 29 Nov 2021 17:00:25 +0000 (-0500)
Subject: mm/mempolicy: Fix prev assigment.  Fixes vma04
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d56d2c2aa62a9031e0311fff18f1540e756e1c9c;p=users%2Fjedix%2Flinux-maple.git

mm/mempolicy: Fix prev assigment.  Fixes vma04

Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index b4842e84e442..a077eb04b8c9 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -791,8 +791,8 @@ static int mbind_range(struct mm_struct *mm, unsigned long start,
 	int err = 0;
 	pgoff_t pgoff;
 
-	prev = mas_prev(&mas, 0);
-	if (prev && prev->vm_start > start)
+	prev = vma = find_vma(mm, start);
+	if (start <= vma->vm_start)
 		prev = mas_prev(&mas, 0);
 
 	mas_for_each(&mas, vma, end - 1) {