diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index f86a47056ea8..9d7e12e40089 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -367,6 +367,7 @@ static void scsifront_do_response(struct vscsifrnt_info *info,
 	struct vscsifrnt_shadow *shadow;
 
 	if (ring_rsp->rqid >= VSCSIIF_MAX_REQS ||
+	    !info->shadow[ring_rsp->rqid] ||
 	    !info->shadow[ring_rsp->rqid]->inflight) {
 		scsifront_set_error(info, "illegal rqid returned by backend!");
 		return;