Messages in this thread Patch in this message | | | From | Liam Howlett <> | Subject | [PATCH v2 20/22] mm/mremap: Use vma_lookup() in vma_to_resize() | Date | Fri, 21 May 2021 17:48:07 +0000 |
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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.
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Davidlohr Bueso <dbueso@suse.de> --- mm/mremap.c | 5 +++-- 1 file 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); /* -- 2.30.2
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