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>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index df04c00572714cef5e80539a3765bf76446b86c3..fbe02815c41a885174fb5f67c78805b78a883876 100644 (file)
--- 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;