diff options
| author |   Liam R. Howlett <Liam.Howlett@Oracle.com> | 2021-09-02 14:56:49 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-03 09:58:14 -0700 |
| commit | 9b593cb20283e68e5e65b09ca10038935297f05b (patch) | |
| tree | 610de4c811972336130633cc814d80ef6c3667fb | |
| parent | mm/pagemap: add mmap_assert_locked() annotations to find_vma*() (diff) | |
| download | linux-dev-9b593cb20283e68e5e65b09ca10038935297f05b.tar.xz linux-dev-9b593cb20283e68e5e65b09ca10038935297f05b.zip | |
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@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 79f4f8ae43ec..52fed230dc21 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2994,14 +2994,11 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, 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; |