do_brk_munmap() already has aligned addresses.
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
mm/mmap.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index cf4aa715eb63..3b1a9f6bc39b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2965,12 +2965,16 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma,
struct mm_struct *mm = vma->vm_mm;
struct vm_area_struct unmap;
unsigned long unmap_pages;
- int ret = 1;
+ int ret;
arch_unmap(mm, newbrk, oldbrk);
- if (likely(vma->vm_start >= newbrk)) { // remove entire mapping(s)
- ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true);
+ if (likely((vma->vm_end < oldbrk) ||
+ ((vma->vm_start == newbrk) && (vma->vm_end == oldbrk)))) {
+ // remove entire mapping(s)
+ mas->last = oldbrk - 1;
+ ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf,
+ true);
goto munmap_full_vma;
}
--
2.30.2
