Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: f78b937c95ddc4f7a29e41fee98e96076828a108
https://github.com/tianocore/edk2/commit/f78b937c95ddc4f7a29e41fee98e96076828a108
Author: Gerd Hoffmann <[email protected]>
Date: 2022-02-07 (Mon, 07 Feb 2022)
Changed paths:
M MdeModulePkg/Core/RuntimeDxe/Runtime.c
Log Message:
-----------
MdeModulePkg/RuntimeDxe: clear mVirtualMapMaxIndex
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 <[email protected]>
Reviewed-by: Liming Gao <[email protected]>
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