diff --git a/fs/aio.c b/fs/aio.c
index d7910c7c93a6..722476560848 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -422,7 +422,8 @@ static int aio_ring_mremap(struct vm_area_struct *vma)
 
 		ctx = rcu_dereference(table->table[i]);
 		if (ctx && ctx->aio_ring_file == file) {
-			if (!atomic_read(&ctx->dead)) {
+			if (!atomic_read(&ctx->dead) &&
+			    (ctx->mmap_size == (vma->vm_end - vma->vm_start))) {
 				ctx->user_id = ctx->mmap_base = vma->vm_start;
 				res = 0;
 			}