When setting mVirtualMap to NULL also set mVirtualMapMaxIndex to 0. Without that RuntimeDriverConvertPointer() will go search the ZeroPage for EFI_MEMORY_DESCRIPTOR entries.
In case mVirtualMapMaxIndex happens to be small small enough that'll go unnoticed, the search will not find anything and EFI_NOT_FOUND will be returned. In case mVirtualMapMaxIndex is big enough the search will reach the end of the ZeroPage and trigger a page fault. Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- MdeModulePkg/Core/RuntimeDxe/Runtime.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Core/RuntimeDxe/Runtime.c b/MdeModulePkg/Core/RuntimeDxe/Runtime.c index 2a541408731d..de8f2bfce0f8 100644 --- a/MdeModulePkg/Core/RuntimeDxe/Runtime.c +++ b/MdeModulePkg/Core/RuntimeDxe/Runtime.c @@ -365,7 +365,8 @@ RuntimeDriverSetVirtualAddressMap ( // // mVirtualMap is only valid during SetVirtualAddressMap() call // - mVirtualMap = NULL; + mVirtualMap = NULL; + mVirtualMapMaxIndex = 0; return EFI_SUCCESS; } -- 2.34.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#85920): https://edk2.groups.io/g/devel/message/85920 Mute This Topic: https://groups.io/mt/88581862/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
