diff options
| author | Liam Howlett <[email protected]> | 2021-06-28 19:39:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-06-29 10:53:52 -0700 |
| commit | 5aaf07f0812adef788f9f08a73914148b5fdd40e (patch) | |
| tree | 8e90ad9ca25156a641556df54b1ee1b88ba37b60 | |
| parent | 059b8b4875b3c046770e4f9fb553ece40b217b40 (diff) | |
mm/mremap: use vma_lookup() in vma_to_resize()
Use vma_lookup() to find the VMA at a specific address. As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Liam R. Howlett <[email protected]>
Reviewed-by: Laurent Dufour <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Acked-by: Davidlohr Bueso <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/mremap.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index 47c255b60150..a369a6100698 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -634,10 +634,11 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr, unsigned long *p) { struct mm_struct *mm = current->mm; - struct vm_area_struct *vma = find_vma(mm, addr); + struct vm_area_struct *vma; unsigned long pgoff; - if (!vma || vma->vm_start > addr) + vma = vma_lookup(mm, addr); + if (!vma) return ERR_PTR(-EFAULT); /* |