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mmap: check ->vm_ops before dereferencing
[safe/jmp/linux-2.6]
/
mm
/
mmap.c
diff --git
a/mm/mmap.c
b/mm/mmap.c
index
f90ea92
..
456ec6f
100644
(file)
--- a/
mm/mmap.c
+++ b/
mm/mmap.c
@@
-1977,7
+1977,8
@@
static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
return 0;
/* Clean everything up if vma_adjust failed. */
- new->vm_ops->close(new);
+ if (new->vm_ops && new->vm_ops->close)
+ new->vm_ops->close(new);
if (new->vm_file) {
if (vma->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(mm);