From: Liam R. Howlett <Liam.Howlett@oracle.com>
Date: Fri, 22 Apr 2022 01:59:04 +0000 (-0400)
Subject: mm/mempolicy: Fix vma iteration in mbind_range()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=refs%2Fheads%2Fmaple_prealloc;p=users%2Fjedix%2Flinux-maple.git

mm/mempolicy: Fix vma iteration in mbind_range()

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

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index b8f25d4d6fa0..78d706196d4a 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -837,7 +837,8 @@ static int mbind_range(struct mm_struct *mm, unsigned long start,
 			err = split_vma(vma->vm_mm, vma, vmend, 0);
 			if (err)
 				goto out;
-			/* mas_pause() unnecessary as the loop is ending */
+			/* split_vma() invalidated the mas */
+			mas_pause(&mas);
 		}
 replace:
 		err = vma_replace_policy(vma, new_pol);