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MdeModulePkg/Variable: Check if there is a NV Variable Storage header prior to use its attributes

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The Variable PEI and RuntimeDxe drivers were using the attribute 'HeaderLength' of
EFI_FIRMWARE_VOLUME_HEADER without checking if a Firmware Volume Header was existing at
the base address.
In case the Firmware Volume Header does not exist or is corrupted, the attribute 'HeaderLength'
is a non valid value that can lead to a non valid physical address when accessing produces an
access error.

Signed-off-by: oliviermartin
Reviewed-by: niruiyu



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12836 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-12-12 19:00:59 +00:00
parent 7f070be5c9
commit d65502601e
7 changed files with 325 additions and 301 deletions
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1
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
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@@ -64,6 +64,7 @@
gEfiVariableGuid ## PRODUCES ## Configuration Table Guid
gEfiGlobalVariableGuid ## PRODUCES ## Variable Guid
gEfiEventVirtualAddressChangeGuid ## PRODUCES ## Event
gEfiSystemNvDataFvGuid ## CONSUMES
[Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize