When failure occurs and return, vma->vm_pgoff is already set, which is
not a good idea.
Signed-off-by: Chen Gang <gang.chen.5...@gmail.com>
---
mm/mmap.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 8e0366e..b5a6f09 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2878,6 +2878,13 @@ int insert_vm_struct(struct mm_struct *mm, struct
vm_area_struct *vma)
struct vm_area_struct *prev;
struct rb_node **rb_link, *rb_parent;
+ if (find_vma_links(mm, vma->vm_start, vma->vm_end,
+ &prev, &rb_link, &rb_parent))
+ return -ENOMEM;
+ if ((vma->vm_flags & VM_ACCOUNT) &&
+ security_vm_enough_memory_mm(mm, vma_pages(vma)))
+ return -ENOMEM;
+
/*
* The vm_pgoff of a purely anonymous vma should be irrelevant
* until its first write fault, when page's anon_vma and index
@@ -2894,12 +2901,6 @@ int insert_vm_struct(struct mm_struct *mm, struct
vm_area_struct *vma)
BUG_ON(vma->anon_vma);
vma->vm_pgoff = vma->vm_start>> PAGE_SHIFT;
}
- if (find_vma_links(mm, vma->vm_start, vma->vm_end,
- &prev, &rb_link, &rb_parent))
- return -ENOMEM;
- if ((vma->vm_flags & VM_ACCOUNT) &&
- security_vm_enough_memory_mm(mm, vma_pages(vma)))
- return -ENOMEM;
vma_link(mm, vma, prev, rb_link, rb_parent);
return 0;
--
1.9.3
--
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