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remap_file_pages: correctly handle the case of a NULL vm_ops pointer
[firefly-linux-kernel-4.4.55.git]
/
mm
/
fremap.c
diff --git
a/mm/fremap.c
b/mm/fremap.c
index 3899a86851ceb6bf021e51c014fef16e0893a7f0..a0aaf0e56800394be8b9ae0d0da47712b6e0bb53 100644
(file)
--- a/
mm/fremap.c
+++ b/
mm/fremap.c
@@
-169,7
+169,7
@@
SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
if (vma->vm_private_data && !(vma->vm_flags & VM_NONLINEAR))
goto out;
- if (!vma->vm_ops->remap_pages)
+ if (!vma->vm_ops
|| !vma->vm_ops
->remap_pages)
goto out;
if (start < vma->vm_start || start + size > vma->vm_end)