From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> Subject: remap_file_pages: Use vma_lookup() instead of find_vma() Using vma_lookup() verifies the start address is contained in the found vma. This results in easier to read code. Link: https://lkml.kernel.org/r/20210817135234.1550204-1-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/mmap.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/mm/mmap.c~remap_file_pages-use-vma_lookup-instead-of-find_vma +++ a/mm/mmap.c @@ -2994,14 +2994,11 @@ SYSCALL_DEFINE5(remap_file_pages, unsign if (mmap_write_lock_killable(mm)) return -EINTR; - vma = find_vma(mm, start); + vma = vma_lookup(mm, start); if (!vma || !(vma->vm_flags & VM_SHARED)) goto out; - if (start < vma->vm_start) - goto out; - if (start + size > vma->vm_end) { struct vm_area_struct *next; _
