From d7b94e61bbbaf54bea4cd0c20840cc7c13e75e54 Mon Sep 17 00:00:00 2001
From: liqiao49 <liqiao49@huawei.com>
Date: Thu, 13 Jul 2023 09:47:27 +0800
Subject: [PATCH] fix null pointer is not verified

Signed-off-by: liqiao49 <liqiao49@huawei.com>
---
 interfaces/ipc/src/distributed_input_sink_stub.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/interfaces/ipc/src/distributed_input_sink_stub.cpp b/interfaces/ipc/src/distributed_input_sink_stub.cpp
index 306f6e4..04b77e3 100644
--- a/interfaces/ipc/src/distributed_input_sink_stub.cpp
+++ b/interfaces/ipc/src/distributed_input_sink_stub.cpp
@@ -138,6 +138,10 @@ int32_t DistributedInputSinkStub::NotifyStopDScreenInner(MessageParcel &data, Me
 int32_t DistributedInputSinkStub::RegisterSharingDhIdListenerInner(MessageParcel &data, MessageParcel &reply,
     MessageOption &option)
 {
+    if (data.ReadRemoteObject() == nullptr) {
+        DHLOGE("RegisterSharingDhIdListenerInner failed, data.ReadRemoteObject is nullptr.");
+        return ERR_DH_INPUT_SINK_STUB_REGISTER_SHARING_DHID_LISTENER_FAIL;
+    }
     sptr<ISharingDhIdListener> listener = iface_cast<ISharingDhIdListener>(data.ReadRemoteObject());
     int32_t ret = RegisterSharingDhIdListener(listener);
     if (!reply.WriteInt32(ret)) {