From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Thu, 4 Feb 2021 01:06:44 +0000 (-0500)
Subject: mm/mmap: Assert lock is held before running validate_mm()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=112c459d6d1ddea0280bbce66d7499306c5b8360;p=users%2Fjedix%2Flinux-maple.git

mm/mmap: Assert lock is held before running validate_mm()

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

diff --git a/mm/mmap.c b/mm/mmap.c
index a6c9348d61cdb..61af80f654e42 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -312,6 +312,7 @@ static void validate_mm(struct mm_struct *mm)
 	struct vm_area_struct *vma;
 	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
+	mmap_assert_locked(mm);
 
 	mt_validate(&mm->mm_mt);
 	mas_for_each(&mas, vma, ULONG_MAX) {