diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 8d07c12..568cb41 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -539,6 +539,8 @@
 int ib_query_device(struct ib_device *device,
 		    struct ib_device_attr *device_attr)
 {
+	memset(device_attr, 0, sizeof(*device_attr));
+
 	return device->query_device(device, device_attr);
 }
 EXPORT_SYMBOL(ib_query_device);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 51311b1c..11ee298 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -3426,6 +3426,8 @@
 	if (ucore->outlen < resp.response_length)
 		return -ENOSPC;
 
+	memset(&attr, 0, sizeof(attr));
+
 	err = device->query_device(device, &attr);
 	if (err)
 		return err;
@@ -3450,6 +3452,18 @@
 #endif
 	resp.response_length += sizeof(resp.odp_caps);
 
+	if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
+		goto end;
+
+	resp.timestamp_mask = attr.timestamp_mask;
+	resp.response_length += sizeof(resp.timestamp_mask);
+
+	if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
+		goto end;
+
+	resp.hca_core_clock = attr.hca_core_clock;
+	resp.response_length += sizeof(resp.hca_core_clock);
+
 end:
 	err = ib_copy_to_udata(ucore, &resp, resp.response_length);
 	if (err)