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-rw-r--r--mm/mmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index d2b6d44962b7..8295577a83b2 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2216,7 +2216,7 @@ int install_special_mapping(struct mm_struct *mm,
vma->vm_start = addr;
vma->vm_end = addr + len;
- vma->vm_flags = vm_flags | mm->def_flags;
+ vma->vm_flags = vm_flags | mm->def_flags | VM_DONTEXPAND;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
vma->vm_ops = &special_mapping_vmops;