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sys: symbolic link testing

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This commit is contained in:
Bill Zissimopoulos 2016-09-11 17:18:56 -07:00
parent bd0acf2289
commit 25a2873556
1 changed files with 10 additions and 7 deletions
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17
src/sys/create.c
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@ -511,10 +511,13 @@ NTSTATUS FspFsvolCreateComplete(
{ {
/* /*
* IO_REPARSE means that the user-mode file system has returned a device-relative * IO_REPARSE means that the user-mode file system has returned a device-relative
* path. Prefix it with our device name and send it to the IO Manager. * (absolute in the device namespace) path. Prefix it with our device name/prefix
* and send it to the IO Manager.
* *
* IO_REPARSE_TAG_SYMLINK means that the user-mode file system has returned a full * IO_REPARSE_TAG_SYMLINK means that the user-mode file system has returned a full
* symbolic link reparse buffer. In this case send the target path to the IO Manager. * symbolic link reparse buffer with an absolute (in the NT namespace) path. Send
* it as is to the IO Manager. The FSD cannot handle relative symbolic links, so
* it is the responsibility of the user-mode file system to resolve them.
*/ */
if (IO_REPARSE == Response->IoStatus.Information) if (IO_REPARSE == Response->IoStatus.Information)
@ -531,8 +534,7 @@ NTSTATUS FspFsvolCreateComplete(
if ((PUINT8)ReparseTargetPath.Buffer + ReparseTargetPath.Length > if ((PUINT8)ReparseTargetPath.Buffer + ReparseTargetPath.Length >
(PUINT8)Response + Response->Size || (PUINT8)Response + Response->Size ||
sizeof(WCHAR) > ReparseTargetPath.Length || ReparseTargetPath.Length < sizeof(WCHAR) || L'\\' != ReparseTargetPath.Buffer[0])
L'\\' != ReparseTargetPath.Buffer[0])
FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED); FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED);
} }
else else
@ -550,9 +552,6 @@ NTSTATUS FspFsvolCreateComplete(
if (!NT_SUCCESS(Result)) if (!NT_SUCCESS(Result))
FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED); FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED);
if (FlagOn(ReparseData->SymbolicLinkReparseBuffer.Flags, SYMLINK_FLAG_RELATIVE))
FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED);
RtlZeroMemory(&ReparseTargetPrefix0, sizeof ReparseTargetPrefix0); RtlZeroMemory(&ReparseTargetPrefix0, sizeof ReparseTargetPrefix0);
RtlZeroMemory(&ReparseTargetPrefix1, sizeof ReparseTargetPrefix1); RtlZeroMemory(&ReparseTargetPrefix1, sizeof ReparseTargetPrefix1);
@ -560,6 +559,10 @@ NTSTATUS FspFsvolCreateComplete(
ReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR); ReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR);
ReparseTargetPath.Length = ReparseTargetPath.MaximumLength = ReparseTargetPath.Length = ReparseTargetPath.MaximumLength =
ReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength; ReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength;
if (FlagOn(ReparseData->SymbolicLinkReparseBuffer.Flags, SYMLINK_FLAG_RELATIVE) ||
ReparseTargetPath.Length < sizeof(WCHAR) || L'\\' != ReparseTargetPath.Buffer[0])
FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED);
} }
if (ReparseTargetPrefix0.Length + ReparseTargetPrefix1.Length + ReparseTargetPath.Length > if (ReparseTargetPrefix0.Length + ReparseTargetPrefix1.Length + ReparseTargetPath.Length >