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- Do only attach/detach the process if the address is in user space

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and if the current process is not the creator process (in MmProbeAndLockPages).

svn path=/trunk/; revision=5009
This commit is contained in:
Hartmut Birr 2003-07-06 10:50:21 +00:00
parent 0ae49a2c5e
commit 8ed329a442
1 changed files with 8 additions and 8 deletions
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16
reactos/ntoskrnl/mm/mdl.c
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@ -1,4 +1,4 @@
/* $Id: mdl.c,v 1.50 2003/06/19 19:01:01 gvg Exp $ /* $Id: mdl.c,v 1.51 2003/07/06 10:50:21 hbirr Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -284,7 +284,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
ULONG NrPages; ULONG NrPages;
NTSTATUS Status; NTSTATUS Status;
KPROCESSOR_MODE Mode; KPROCESSOR_MODE Mode;
PEPROCESS CurrentProcess; PEPROCESS CurrentProcess = NULL;
DPRINT("MmProbeAndLockPages(Mdl %x)\n", Mdl); DPRINT("MmProbeAndLockPages(Mdl %x)\n", Mdl);
@ -296,12 +296,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
return; return;
} }
CurrentProcess = PsGetCurrentProcess();
if (Mdl->Process != CurrentProcess)
{
KeAttachProcess(Mdl->Process);
}
if (Mdl->StartVa >= (PVOID)KERNEL_BASE) if (Mdl->StartVa >= (PVOID)KERNEL_BASE)
{ {
@ -310,6 +305,11 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
else else
{ {
Mode = UserMode; Mode = UserMode;
CurrentProcess = PsGetCurrentProcess();
if (Mdl->Process != CurrentProcess)
{
KeAttachProcess(Mdl->Process);
}
} }
/* /*
@ -361,7 +361,7 @@ VOID STDCALL MmProbeAndLockPages (PMDL Mdl,
MmReferencePage((LARGE_INTEGER)(LONGLONG)MdlPages[i]); MmReferencePage((LARGE_INTEGER)(LONGLONG)MdlPages[i]);
} }
MmUnlockAddressSpace(&Mdl->Process->AddressSpace); MmUnlockAddressSpace(&Mdl->Process->AddressSpace);
if (Mdl->Process != CurrentProcess) if (Mode == UserMode && Mdl->Process != CurrentProcess)
{ {
KeDetachProcess(); KeDetachProcess();
} }