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If setting variable in Runtime and there has been a same GUID and name variable existed in system without RT attribute, return EFI_WRITE_PROTECTED.

Browse Source 
Signed-off-by: lzeng14
Reviewed-by: tye

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13156 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lzeng14
2012-03-30 07:19:44 +00:00
parent 0ecd7c4a02
commit 9622df63df
3 changed files with 45 additions and 28 deletions
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20
SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c
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@@ -720,7 +720,8 @@ Reclaim (
@param[in] VariableName Name of the variable to be found
@param[in] VendorGuid Vendor GUID to be found.
@param[in] IgnoreRtAttribute Ignore RUNTIME_ACCESS attribute when searching variable.
@param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute
check at runtime when searching variable.
@param[in, out] PtrTrack Variable Track Pointer structure that contains Variable Information.
@retval EFI_SUCCESS Variable found successfully
@@ -730,7 +731,7 @@ EFI_STATUS
FindVariableEx (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
IN BOOLEAN IgnoreRtAttribute,
IN BOOLEAN IgnoreRtCheck,
IN OUT VARIABLE_POINTER_TRACK *PtrTrack
)
{
@@ -749,7 +750,7 @@ FindVariableEx (
if (PtrTrack->CurrPtr->State == VAR_ADDED ||
PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)
) {
if (IgnoreRtAttribute || !AtRuntime () || ((PtrTrack->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {
if (IgnoreRtCheck || !AtRuntime () || ((PtrTrack->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {
if (VariableName[0] == 0) {
if (PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
InDeletedVariable = PtrTrack->CurrPtr;
@@ -785,9 +786,9 @@ FindVariableEx (
This code finds variable in storage blocks of volatile and non-volatile storage areas.
If VariableName is an empty string, then we just return the first
qualified variable without comparing VariableName and VendorGuid.
If IgnoreRtAttribute is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS Attribute
when searching existing variable, only VariableName and VendorGuid are compared.
Otherwise, variables with EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.
If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check
at runtime when searching existing variable, only VariableName and VendorGuid are compared.
Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.
@param[in] VariableName Name of the variable to be found.
@param[in] VendorGuid Vendor GUID to be found.
@@ -796,7 +797,8 @@ FindVariableEx (
@param[in] Global Pointer to VARIABLE_GLOBAL structure, including
base of volatile variable storage area, base of
NV variable storage area, and a lock.
@param[in] IgnoreRtAttribute Ignore RUNTIME_ACCESS attribute when searching variable.
@param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute
check at runtime when searching variable.
@retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while
VendorGuid is NULL.
@@ -810,7 +812,7 @@ FindVariable (
IN EFI_GUID *VendorGuid,
OUT VARIABLE_POINTER_TRACK *PtrTrack,
IN VARIABLE_GLOBAL *Global,
IN BOOLEAN IgnoreRtAttribute
IN BOOLEAN IgnoreRtCheck
)
{
EFI_STATUS Status;
@@ -842,7 +844,7 @@ FindVariable (
PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Type]);
PtrTrack->Volatile = (BOOLEAN) (Type == VariableStoreTypeVolatile);
Status = FindVariableEx (VariableName, VendorGuid, IgnoreRtAttribute, PtrTrack);
Status = FindVariableEx (VariableName, VendorGuid, IgnoreRtCheck, PtrTrack);
if (!EFI_ERROR (Status)) {
return Status;
}