On 17.08.21 15:52, Liam Howlett wrote:
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Using vma_lookup() verifies the start address is contained in the found vma.
This results in easier to read code.
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
mm/mmap.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index d9aa54be6244..1a23d4575cc4 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;
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
--
Thanks,
David / dhildenb
