1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/relay.c b/kernel/relay.c
index 61134eb7a0c8..7c0373322f18 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -92,6 +92,7 @@ static int relay_mmap_buf(struct rchan_buf *buf, struct vm_area_struct *vma)
                 return -EINVAL;
 
         vma->vm_ops = &relay_file_mmap_ops;
+        vma->vm_flags |= VM_DONTEXPAND;
         vma->vm_private_data = buf;
         buf->chan->cb->buf_mapped(buf, filp);