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better handling of invalid strings in IntSafeCopyUnicodeString()

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svn path=/trunk/; revision=9146
This commit is contained in:
Thomas Bluemel 2004-04-14 23:40:43 +00:00
parent a746bec6f1
commit b5c06d7dbd
1 changed files with 10 additions and 4 deletions
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14
reactos/subsys/win32k/ntuser/misc.c
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@ -1,4 +1,4 @@
/* $Id: misc.c,v 1.60 2004/04/14 23:17:56 weiden Exp $ /* $Id: misc.c,v 1.61 2004/04/14 23:40:43 weiden Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -931,10 +931,16 @@ IntSafeCopyUnicodeString(PUNICODE_STRING Dest,
return Status; return Status;
} }
if(Dest->Length > 0) if(Dest->Length > 0x4000)
{
return STATUS_UNSUCCESSFUL;
}
Src = Dest->Buffer;
Dest->Buffer = NULL;
if(Dest->Length > 0 && Src)
{ {
Src = Dest->Buffer;
Dest->Buffer = ExAllocatePoolWithTag(NonPagedPool, Dest->Length, TAG_STRING); Dest->Buffer = ExAllocatePoolWithTag(NonPagedPool, Dest->Length, TAG_STRING);
if(!Dest->Buffer) if(!Dest->Buffer)
{ {