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| author | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-04-24 09:33:48 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-04-24 09:33:48 +0000 |
| commit | f07268bd0fd23556bc8cdcd72f0410724c04de44 (patch) | |
| tree | a56cb065f1f74d3bef2bc841239240fd83104ee2 /MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf | |
| parent | 7aa54c140cf3f5da3d51e3eded8b1431612236a5 (diff) | |
| download | edk2-f07268bd0fd23556bc8cdcd72f0410724c04de44.zip edk2-f07268bd0fd23556bc8cdcd72f0410724c04de44.tar.gz edk2-f07268bd0fd23556bc8cdcd72f0410724c04de44.tar.bz2 | |
Mallicious code may use SmmFaultTolerantWriteHandler() to update some flash area directly, like Variable region, so return EFI_ACCESS_DENIED after End Of Dxe in SmmFaultTolerantWriteHandler().
And add code to prevent InfoSize overflow.
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14312 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf')
| -rw-r--r-- | MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf index 3ed0393..a0dda05 100644 --- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf +++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf @@ -1,8 +1,11 @@ ## @file
-# This module is the Runtime DXE part corresponding to SMM Fault Tolerant Write (FTW) module.
+# This module is the DXE part corresponding to SMM Fault Tolerant Write (FTW) module.
# It installs FTW protocol and works with SMM FTW module together.
+# The FTW protocol will not work after End Of Dxe because it will be not safe to expose
+# the related operations in SMM handler in SMM FTW module. You can use the FTW protocol
+# before End Of Dxe or use FaultTolerantWriteDxe module instead if you really want to.
#
-# Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
|