Commit 75ab038d authored by Michael D Kinney's avatar Michael D Kinney Committed by mergify[bot]
Browse files

MdeModulePkg/Library/VarCheckLib: Allow SetVariable from SMM

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3154



Update VarCheckLibSetVariableCheck() to allow locked variables
to be updated if the RequestSource is VarCheckFromTrusted even
if one or more variable check handlers return EFI_WRITE_PROTECTED.
RequestSource is only set to VarCheckFromTrusted if the request
is through the EFI_SMM_VARAIBLE_PROTOCOL.

Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: default avatarMichael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: default avatarBret Barkelew <bret.barkelew@microsoft.com>
Reviewed-by: default avatarHao A Wu <hao.a.wu@intel.com>
(cherry picked from commit 248d08c5

)
Reviewed-by: default avatarLiming Gao <gaoliming@byosoft.com.cn>
parent 184ece2d
/** @file
Implementation functions and structures for var check services.
Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
......@@ -655,6 +655,13 @@ VarCheckLibSetVariableCheck (
DataSize,
Data
);
if (Status == EFI_WRITE_PROTECTED && RequestSource == VarCheckFromTrusted) {
//
// If RequestSource is trusted, then allow variable to be set even if it
// is write protected.
//
continue;
}
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_INFO, "Variable Check handler fail %r - %g:%s\n", Status, VendorGuid, VariableName));
return Status;
......
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