Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: c87ea4751991ecb107d72437f45b70e25734c927
https://github.com/tianocore/edk2/commit/c87ea4751991ecb107d72437f45b70e25734c927
Author: DeepakX Singh <[email protected]>
Date: 2025-06-09 (Mon, 09 Jun 2025)
Changed paths:
M MdeModulePkg/Universal/HiiDatabaseDxe/Database.c
Log Message:
-----------
MdeModulePkg/HiiDatabaseDxe: Fix NULL Pointer access from EfiVarStore
Issue : When user access "Boot Maintenance Manager Menu/Secure Boot
Configuration Menu" with PcdNullPointerDetectionPropertyMask|0x03 and
PcdHeapGuardPageType|0x7FFF protection policy set,
we get X64 Exception Type - 0E(#PF - Page-Fault)
Root cause : When user access "Boot Maintenance Manager Menu/Secure Boot
Configuration Menu", BIOS calls FindQuestionDefaultSetting function and
send EFI VarStore header pointer to AuthFindVariableData function.
When header pointer is NULL, it send NULL pointer to AuthFindVariableData
function and causes the page fault.
Fix : Database.c: In function FindQuestionDefaultSetting, added
NULL pointers check, so that when EFI VarStore header argument is passed
to AuthFindVariableData function, NULL pointer access will not happen.
Test: Cross verified while accessing the "Boot Maintenance Manager Menu/
Secure Boot Configuration Menu" page.
Signed-off-by: DeepakX Singh <[email protected]>
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