回复: [edk2-devel] [PATCH] MdeModulePkg/Variable: Make only EFI_VARIABLE_NON_VOLATILE invalid

["gaoliming" <gaoliming@byosoft.com.cn>]

Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Sunny Wang
> 发送时间: 2022年1月12日 5:37
> 收件人: devel@edk2.groups.io
> 抄送: Sunny Wang <Sunny.Wang@arm.com>; Liming Gao
> <gaoliming@byosoft.com.cn>; Heinrich Schuchardt
> <heinrich.schuchardt@canonical.com>; G Edhaya Chandran
> <edhaya.chandran@arm.com>; Samer El-Haj-Mahmoud
> <samer.el-haj-mahmoud@arm.com>; Sunny Wang <sunny.wang@arm.com>
> 主题: [edk2-devel] [PATCH] MdeModulePkg/Variable: Make only
> EFI_VARIABLE_NON_VOLATILE invalid
> 
> Only EFI_VARIABLE_NON_VOLATILE attribute is an invalid combination
> of attribute bits, so update the variable driver to return
> EFI_INVALID_PARAMETER so that we can prevent the invalid variable
> being created.
> 
> This change also fixes the SCT failure below:
>  - RT.QueryVariableInfo - With being an invalid combination -- FAILURE
> 
> For details, please check the threads below:
>  - https://edk2.groups.io/g/devel/topic/86486174
>  - https://edk2.groups.io/g/devel/message/82466
> 
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Cc: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
> Cc: G Edhaya Chandran <edhaya.chandran@arm.com>
> Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@arm.com>
> 
> Signed-off-by: Sunny Wang <sunny.wang@arm.com>
> ---
>  .../Universal/Variable/RuntimeDxe/Variable.c     | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
> b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
> index 9722a94420..6c1a3440ac 100644
> --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
> +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
> @@ -19,6 +19,7 @@
>  Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
>  (C) Copyright 2015-2018 Hewlett Packard Enterprise Development LP<BR>
>  Copyright (c) Microsoft Corporation.<BR>
> +Copyright (c) 2022, ARM Limited. All rights reserved.<BR>
> 
>  SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> @@ -2660,14 +2661,22 @@ VariableServiceSetVariable (
>    }
> 
>    //
> -  //  Make sure if runtime bit is set, boot service bit is set also.
> +  // Check if the combination of attribute bits is valid.
>    //
>    if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS |
> EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS)
> {
> +    //
> +    // Make sure if runtime bit is set, boot service bit is set also.
> +    //
>      if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) != 0)
> {
>        return EFI_UNSUPPORTED;
>      } else {
>        return EFI_INVALID_PARAMETER;
>      }
> +  } else if ((Attributes & EFI_VARIABLE_ATTRIBUTES_MASK) ==
> EFI_VARIABLE_NON_VOLATILE) {
> +    //
> +    // Only EFI_VARIABLE_NON_VOLATILE attribute is invalid
> +    //
> +    return EFI_INVALID_PARAMETER;
>    } else if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {
>      if (!mVariableModuleGlobal->VariableGlobal.AuthSupport) {
>        //
> @@ -3142,6 +3151,11 @@ VariableServiceQueryVariableInfo (
>      // Make sure the Attributes combination is supported by the platform.
>      //
>      return EFI_UNSUPPORTED;
> +  } else if ((Attributes & EFI_VARIABLE_ATTRIBUTES_MASK) ==
> EFI_VARIABLE_NON_VOLATILE) {
> +    //
> +    // Only EFI_VARIABLE_NON_VOLATILE attribute is invalid
> +    //
> +    return EFI_INVALID_PARAMETER;
>    } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS |
> EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS)
> {
>      //
>      // Make sure if runtime bit is set, boot service bit is set also.
> --
> 2.33.0.windows.2
> 
> 
> 
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