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SeCaptureSubjectContext() must not crash if no current thread exists.

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svn path=/trunk/; revision=10226
This commit is contained in:
Eric Kohl 2004-07-19 12:45:56 +00:00
parent 06272913f0
commit ae95148c4b
1 changed files with 31 additions and 17 deletions
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48
reactos/ntoskrnl/se/semgr.c
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@ -1,4 +1,4 @@
/* $Id: semgr.c,v 1.34 2004/07/18 13:02:28 ekohl Exp $
/* $Id: semgr.c,v 1.35 2004/07/19 12:45:56 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -208,19 +208,28 @@ NtAllocateUuids(PULARGE_INTEGER Time,
VOID STDCALL
SeCaptureSubjectContext(OUT PSECURITY_SUBJECT_CONTEXT SubjectContext)
{
PEPROCESS Process;
PETHREAD Thread;
BOOLEAN CopyOnOpen;
BOOLEAN EffectiveOnly;
Process = PsGetCurrentThread ()->ThreadsProcess;
SubjectContext->ProcessAuditId = Process;
SubjectContext->ClientToken =
PsReferenceImpersonationToken (PsGetCurrentThread(),
&CopyOnOpen,
&EffectiveOnly,
&SubjectContext->ImpersonationLevel);
SubjectContext->PrimaryToken = PsReferencePrimaryToken (Process);
Thread = PsGetCurrentThread();
if (Thread == NULL)
{
SubjectContext->ProcessAuditId = 0;
SubjectContext->PrimaryToken = NULL;
SubjectContext->ClientToken = NULL;
SubjectContext->ImpersonationLevel = 0;
}
else
{
SubjectContext->ProcessAuditId = Thread->ThreadsProcess;
SubjectContext->ClientToken =
PsReferenceImpersonationToken(Thread,
&CopyOnOpen,
&EffectiveOnly,
&SubjectContext->ImpersonationLevel);
SubjectContext->PrimaryToken = PsReferencePrimaryToken(Thread->ThreadsProcess);
}
}
@ -240,10 +249,14 @@ SeLockSubjectContext(IN PSECURITY_SUBJECT_CONTEXT SubjectContext)
VOID STDCALL
SeReleaseSubjectContext(IN PSECURITY_SUBJECT_CONTEXT SubjectContext)
{
ObDereferenceObject (SubjectContext->PrimaryToken);
if (SubjectContext->PrimaryToken != NULL)
{
ObDereferenceObject(SubjectContext->PrimaryToken);
}
if (SubjectContext->ClientToken != NULL)
{
ObDereferenceObject (SubjectContext->ClientToken);
ObDereferenceObject(SubjectContext->ClientToken);
}
}
@ -262,14 +275,15 @@ SeUnlockSubjectContext(IN PSECURITY_SUBJECT_CONTEXT SubjectContext)
* @implemented
*/
NTSTATUS STDCALL
SeDeassignSecurity(PSECURITY_DESCRIPTOR* SecurityDescriptor)
SeDeassignSecurity(PSECURITY_DESCRIPTOR *SecurityDescriptor)
{
if ((*SecurityDescriptor) != NULL)
if (*SecurityDescriptor != NULL)
{
ExFreePool(*SecurityDescriptor);
(*SecurityDescriptor) = NULL;
*SecurityDescriptor = NULL;
}
return(STATUS_SUCCESS);
return STATUS_SUCCESS;
}