Re: [edk2-devel] [PATCH v1 1/1] MdeModulePkg/ReportStatusCodeRouter: Clear RSC Data buffer if Data is NULL

["Dandan Bi" <dandan.bi@intel.com>]

Reviewed-by: Dandan Bi <dandan.bi@intel.com>


Thanks,
Dandan
> -----Original Message-----
> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of
> Michael Kubacki
> Sent: Thursday, April 9, 2020 6:12 AM
> To: devel@edk2.groups.io
> Cc: Bi, Dandan <dandan.bi@intel.com>; Wu, Hao A <hao.a.wu@intel.com>;
> Wang, Jian J <jian.j.wang@intel.com>; Kun Qin <Kun.Qin@microsoft.com>;
> Gao, Liming <liming.gao@intel.com>
> Subject: [edk2-devel] [PATCH v1 1/1]
> MdeModulePkg/ReportStatusCodeRouter: Clear RSC Data buffer if Data is
> NULL
> 
> From: Michael Kubacki <michael.kubacki@microsoft.com>
> 
> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1969
> 
> ReportDispatcher() may be invoked with a NULL Data argument. When TPL is
> less than TPL_HIGH_LEVEL and Data is NULL, the EFI_STATUS_CODE_DATA
> structure inside RscData should be cleared so listeners will not receive data
> from a previous operation.
> 
> Cc: Dandan Bi <dandan.bi@intel.com>
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Kun Qin <Kun.Qin@microsoft.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
> ---
> 
> MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/ReportSt
> atusCodeRouterRuntimeDxe.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git
> a/MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/Report
> StatusCodeRouterRuntimeDxe.c
> b/MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/Report
> StatusCodeRouterRuntimeDxe.c
> index 6ca7e180ebb3..5df83027c62d 100644
> ---
> a/MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/Report
> StatusCodeRouterRuntimeDxe.c
> +++
> b/MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/Report
> Sta
> +++ tusCodeRouterRuntimeDxe.c
> @@ -3,6 +3,7 @@
>    and Status Code Runtime Protocol.
> 
>    Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) Microsoft Corporation.<BR>
>    SPDX-License-Identifier: BSD-2-Clause-Patent
> 
>  **/
> @@ -307,6 +308,9 @@ ReportDispatcher (
>      }
>      if (Data != NULL) {
>        CopyMem (&RscData->Data, Data, Data->HeaderSize + Data->Size);
> +    } else {
> +      ZeroMem (&RscData->Data, sizeof (RscData->Data));
> +      RscData->Data.HeaderSize = sizeof (RscData->Data);
>      }
> 
>      Status = gBS->SignalEvent (CallbackEntry->Event);
> --
> 2.16.3.windows.1
> 
> 
>