diff --git a/src/storage/ob_storage_rpc.cpp b/src/storage/ob_storage_rpc.cpp
index 508656173a..ed5eafc10d 100644
--- a/src/storage/ob_storage_rpc.cpp
+++ b/src/storage/ob_storage_rpc.cpp
@@ -2926,6 +2926,20 @@ ObLobQueryP::ObLobQueryP(common::ObInOutBandwidthThrottle *bandwidth_throttle)
   set_preserve_recv_data();
 }
 
+int64_t ObLobQueryP::get_timeout() const
+{
+  int64_t timeout = 0;
+  const int64_t rpc_timeout = rpc_pkt_->get_timeout();
+  const int64_t send_timestamp = get_send_timestamp();
+  // oversize int64_t if rpc_timeout + send_timestamp > INT64_MAX
+  if (INT64_MAX - rpc_timeout - send_timestamp < 0) {
+    timeout = INT64_MAX;
+  } else {
+    timeout = rpc_timeout + send_timestamp;
+  }
+  return timeout;
+}
+
 int ObLobQueryP::process_read()
 {
   int ret = OB_SUCCESS;
@@ -2943,7 +2957,7 @@ int ObLobQueryP::process_read()
     param.scan_backward_ = arg_.scan_backward_;
     param.from_rpc_ = true;
     ObLobQueryIter *iter = nullptr;
-    int64_t timeout = rpc_pkt_->get_timeout() + get_send_timestamp();
+    int64_t timeout = get_timeout();
     if (OB_FAIL(lob_mngr->build_lob_param(param, allocator_, arg_.cs_type_, arg_.offset_,
         arg_.len_, timeout, arg_.lob_locator_))) {
       LOG_WARN("failed to build lob param", K(ret));
@@ -2990,7 +3004,7 @@ int ObLobQueryP::process_getlength()
   param.from_rpc_ = true;
   header.reset();
   uint64_t len = 0;
-  int64_t timeout = rpc_pkt_->get_timeout() + get_send_timestamp();
+  int64_t timeout = get_timeout();
   if (OB_FAIL(lob_mngr->build_lob_param(param, allocator_, arg_.cs_type_, arg_.offset_,
       arg_.len_, timeout, arg_.lob_locator_))) {
     LOG_WARN("failed to build lob param", K(ret));
diff --git a/src/storage/ob_storage_rpc.h b/src/storage/ob_storage_rpc.h
index 53ea6320c7..46f0183a46 100755
--- a/src/storage/ob_storage_rpc.h
+++ b/src/storage/ob_storage_rpc.h
@@ -1292,6 +1292,7 @@ protected:
 private:
   int process_read();
   int process_getlength();
+  int64_t get_timeout() const;
 };
 
 // Stream get ls meta and all tablet meta