Public/winfsp
1
0
Fork 0
mirror of https://github.com/winfsp/winfsp.git synced 2025-04-22 16:33:02 -05:00
Code Issues Packages Projects Releases Wiki Activity

sys: FspFsvolFileSystemControlReparsePoint: FSCL_DELETE_REPARSE_POINT

Browse Source
This commit is contained in:
Bill Zissimopoulos 2017-01-03 00:48:12 -08:00
parent eecca688bc
commit 23eabe5939
1 changed files with 35 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/sys/fsctl.c
View File

@ -134,12 +134,20 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
if (IsWrite)
{
ASSERT(
FSCTL_SET_REPARSE_POINT == FsControlCode ||
FSCTL_DELETE_REPARSE_POINT == FsControlCode);
if (0 == InputBuffer || 0 == InputBufferLength)
return STATUS_INVALID_BUFFER_SIZE;
if (0 != OutputBufferLength)
return STATUS_INVALID_PARAMETER;
ReparseData = (PREPARSE_DATA_BUFFER)InputBuffer;
if (FSCTL_SET_REPARSE_POINT == FsControlCode)
{
if (FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMAX - (FileNode->FileName.Length + sizeof(WCHAR)) <
InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
@ -147,14 +155,30 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
Result = FsRtlValidateReparsePointBuffer(InputBufferLength, InputBuffer);
if (!NT_SUCCESS(Result))
return Result;
}
else
{
if ((ULONG)FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength &&
(ULONG)FIELD_OFFSET(REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
/* NTFS seems to require one of these rights to allow FSCTL_SET_REPARSE_POINT */
if (0 != ReparseData->ReparseDataLength)
return STATUS_IO_REPARSE_DATA_INVALID;
if (IO_REPARSE_TAG_RESERVED_ZERO == ReparseData->ReparseTag ||
IO_REPARSE_TAG_RESERVED_ONE == ReparseData->ReparseTag)
return STATUS_IO_REPARSE_TAG_INVALID;
if (!IsReparseTagMicrosoft(ReparseData->ReparseTag) &&
(ULONG)FIELD_OFFSET(REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
}
/* NTFS seems to require one of these rights to allow FSCTL_{SET,DELETE}_REPARSE_POINT */
if (!FlagOn(FileDesc->GrantedAccess,
FILE_WRITE_DATA | FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES))
return STATUS_ACCESS_DENIED;
ReparseData = (PREPARSE_DATA_BUFFER)InputBuffer;
if (IO_REPARSE_TAG_SYMLINK == ReparseData->ReparseTag)
{
/* NTFS severely limits symbolic links; we will not do that unless our file system asks */
@ -248,6 +272,8 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
}
else
{
ASSERT(FSCTL_GET_REPARSE_POINT == FsControlCode);
if (0 != InputBufferLength)
return STATUS_INVALID_PARAMETER;