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48 lines
2.0 KiB
48 lines
2.0 KiB
9 months ago
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From 2dbfc91269fd944aeb82e0f9178e0ab278ccf0da Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Tue, 9 Jan 2024 12:29:01 +0100
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Subject: [PATCH 1/2] OvmfPkg/VirtNorFlashDxe: stop accepting gEfiVariableGuid
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Gerd Hoffmann <None>
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RH-MergeRequest: 41: OvmfPkg/VirtNorFlashDxe: sanity-check variables
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RH-Jira: RHEL-20351
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Commit: [1/2] c39aca9d2933518dff4216f585fdfcc492f08673
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Only accept gEfiAuthenticatedVariableGuid when checking the variable
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store header in ValidateFvHeader().
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The edk2 code base has been switched to use the authenticated varstore
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format unconditionally (even in case secure boot is not used or
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supported) a few years ago.
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Suggested-by: László Érsek <lersek@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Message-Id: <20240109112902.30002-3-kraxel@redhat.com>
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(cherry picked from commit ae22b2f136bcbd27135a5f4dd76d3a68a172d00e)
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---
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ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvb.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvb.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvb.c
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index db8eb595f4..904605cbbc 100644
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--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvb.c
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+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvb.c
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@@ -210,8 +210,7 @@ ValidateFvHeader (
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VariableStoreHeader = (VARIABLE_STORE_HEADER*)((UINTN)FwVolHeader + FwVolHeader->HeaderLength);
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// Check the Variable Store Guid
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- if (!CompareGuid (&VariableStoreHeader->Signature, &gEfiVariableGuid) &&
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- !CompareGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid)) {
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+ if (!CompareGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid)) {
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DEBUG ((EFI_D_INFO, "%a: Variable Store Guid non-compatible\n",
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__FUNCTION__));
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return EFI_NOT_FOUND;
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--
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2.41.0
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