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sys: IRP_MJ_CREATE: root directory check

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This commit is contained in:
Bill Zissimopoulos 2016-01-12 15:30:13 -08:00
parent 3c80e25614
commit 4fce03c636
1 changed files with 17 additions and 0 deletions
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17
src/sys/create.c
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@ -99,6 +99,7 @@ static NTSTATUS FspFsvolCreate(
}
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
USHORT FileAttributes = IrpSp->Parameters.Create.FileAttributes;
PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
@ -194,6 +195,14 @@ static NTSTATUS FspFsvolCreate(
if (sizeof(WCHAR) <= FileName.Length && L'\\' == FileName.Buffer[0])
return STATUS_OBJECT_NAME_INVALID;
/* not all operations allowed on the root directory */
if ((FILE_CREATE == CreateDisposition ||
FILE_OVERWRITE == CreateDisposition ||
FILE_SUPERSEDE == CreateDisposition ||
BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY)) &&
sizeof(WCHAR) == RelatedFsContext->FileName.Length && 0 == FileName.Length)
return STATUS_ACCESS_DENIED;
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE) &&
sizeof(WCHAR) == RelatedFsContext->FileName.Length && 0 == FileName.Length)
@ -228,6 +237,14 @@ static NTSTATUS FspFsvolCreate(
if (sizeof(WCHAR) <= FileName.Length && L'\\' != FileName.Buffer[0])
return STATUS_OBJECT_NAME_INVALID;
/* not all operations allowed on the root directory */
if ((FILE_CREATE == CreateDisposition ||
FILE_OVERWRITE == CreateDisposition ||
FILE_SUPERSEDE == CreateDisposition ||
BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY)) &&
sizeof(WCHAR) == FileName.Length)
return STATUS_ACCESS_DENIED;
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE) &&
sizeof(WCHAR) == FileName.Length)