From: Miaohe Lin <linmiaohe@xxxxxxxxxx> Subject: mm/mremap:: use vma_lookup() instead of find_vma() Using vma_lookup() verifies the address is contained in the found vma. This results in easier to read code. Link: https://lkml.kernel.org/r/20220312083118.48284-1-linmiaohe@xxxxxxxxxx Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/mremap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/mremap.c~mm-mremap-use-vma_lookup-instead-of-find_vma +++ a/mm/mremap.c @@ -942,8 +942,8 @@ SYSCALL_DEFINE5(mremap, unsigned long, a if (mmap_write_lock_killable(current->mm)) return -EINTR; - vma = find_vma(mm, addr); - if (!vma || vma->vm_start > addr) { + vma = vma_lookup(mm, addr); + if (!vma) { ret = EFAULT; goto out; } _
