mm/mmap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/mmap.c b/mm/mmap.c
index 318e121affda..ae47c1609d99 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2226,6 +2226,8 @@ find_extend_vma(struct mm_struct * mm, unsigned long addr)
 		return vma;
 	if (!(vma->vm_flags & VM_GROWSDOWN))
 		return NULL;
+	if (vma->vm_prev && vma->vm_prev->vm_end == addr)
+		return NULL;
 	start = vma->vm_start;
 	if (expand_stack(vma, addr))
 		return NULL;