From a78b3a1bb151afb840e10da29aeb5324830c53e4 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Tue, 21 Jun 2022 17:51:42 -0700
Subject: [PATCH] mm-thp-kill-transparent_hugepage_active-fix

check vma->vm_mm, per Zach

Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/huge_memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index df04c0057271..fbe02815c41a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -73,6 +73,9 @@ bool hugepage_vma_check(struct vm_area_struct *vma,
 			unsigned long vm_flags,
 			bool smaps)
 {
+	if (!vma->vm_mm)
+		return false;
+
 	if (!transhuge_vma_enabled(vma, vm_flags))
 		return false;
 
-- 
2.50.1