Add check before free DevicePath (TCP child sock will have no device path installed)

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9617 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 9 insertions, 7 deletions

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
index d38c10172e..2b924c4b4b 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
@@ -227,14 +227,16 @@ Tcp4FlushPcb (
     RemoveEntryList (&Tcb->List);

 

     //

-    // Uninstall the device path protocl.

+    // Uninstall the device path protocol.

     //

-    gBS->UninstallProtocolInterface (

-           Sock->SockHandle,

-           &gEfiDevicePathProtocolGuid,

-           Sock->DevicePath

-           );

-    FreePool (Sock->DevicePath);

+    if (Sock->DevicePath != NULL) {

+      gBS->UninstallProtocolInterface (

+             Sock->SockHandle,

+             &gEfiDevicePathProtocolGuid,

+             Sock->DevicePath

+             );

+      FreePool (Sock->DevicePath);

+    }

 

     TcpSetVariableData (TcpProto->TcpService);

   }