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Patch from w3seek: patch to fix a couple of argument probing bugs in NtQuerySymbolicLinkObject and NtCreateSymbolicLinkObject:

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svn path=/trunk/; revision=22008
This commit is contained in:
Magnus Olsen
2006-05-24 14:41:53 +00:00
parent fbb73a8f5e
commit 80770b053a
1 changed files with 8 additions and 11 deletions
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reactos/ntoskrnl/ob/symlink.c
+8 -11
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@@ -236,8 +236,7 @@ NtCreateSymbolicLinkObject(OUT PHANDLE LinkHandle,
_SEH_TRY
{
/* Probe the target */
ProbeForRead(LinkTarget, sizeof(UNICODE_STRING), sizeof(WCHAR));
CapturedLinkTarget = *LinkTarget;
CapturedLinkTarget = ProbeForReadUnicodeString(LinkTarget);
ProbeForRead(CapturedLinkTarget.Buffer,
CapturedLinkTarget.MaximumLength,
sizeof(WCHAR));
@@ -329,7 +328,7 @@ NtCreateSymbolicLinkObject(OUT PHANDLE LinkHandle,
/* Return the handle to caller */
*LinkHandle = hLink;
}
_SEH_HANDLE
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
/* Get exception code */
Status = _SEH_GetExceptionCode();
@@ -410,7 +409,7 @@ NtOpenSymbolicLinkObject(OUT PHANDLE LinkHandle,
/* Return the handle to caller */
*LinkHandle = hLink;
}
_SEH_HANDLE
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
/* Get exception code */
Status = _SEH_GetExceptionCode();
@@ -448,7 +447,7 @@ NtQuerySymbolicLinkObject(IN HANDLE LinkHandle,
OUT PUNICODE_STRING LinkTarget,
OUT PULONG ResultLength OPTIONAL)
{
UNICODE_STRING SafeLinkTarget;
UNICODE_STRING SafeLinkTarget = {0};
POBJECT_SYMBOLIC_LINK SymlinkObject;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
@@ -460,15 +459,13 @@ NtQuerySymbolicLinkObject(IN HANDLE LinkHandle,
_SEH_TRY
{
/* Probe the unicode string for read and write */
ProbeForRead(LinkTarget, sizeof(UNICODE_STRING), sizeof(WCHAR));
ProbeForWriteUshort(&LinkTarget->Length);
ProbeForWriteUshort(&LinkTarget->MaximumLength);
ProbeForWriteUnicodeString(LinkTarget);
/* Probe the unicode string's buffer for write */
SafeLinkTarget = *LinkTarget;
ProbeForWrite(SafeLinkTarget.Buffer,
SafeLinkTarget.MaximumLength,
sizeof(CHAR));
sizeof(WCHAR));
/* Probe the return length */
if(ResultLength) ProbeForWriteUlong(ResultLength);
@@ -517,7 +514,7 @@ NtQuerySymbolicLinkObject(IN HANDLE LinkHandle,
if (LengthUsed <= SafeLinkTarget.MaximumLength)
{
/* Copy the buffer */
RtlMoveMemory(SafeLinkTarget.Buffer,
RtlCopyMemory(SafeLinkTarget.Buffer,
SymlinkObject->LinkTarget.Buffer,
LengthUsed);
@@ -537,7 +534,7 @@ NtQuerySymbolicLinkObject(IN HANDLE LinkHandle,
*ResultLength = SymlinkObject->LinkTarget.MaximumLength;
}
}
_SEH_HANDLE
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
/* Get the error code */
Status = _SEH_GetExceptionCode();