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[NTOSKRNL] Simplify NtQueryInformationProcess:ProcessDeviceMap implementation

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This commit is contained in:
Pierre Schweitzer 2019-06-01 17:39:29 +02:00
parent 46b90ccb96
commit 445e895932
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GPG key ID: 7545556C3D585B0B
1 changed files with 7 additions and 17 deletions
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24
ntoskrnl/ps/query.c
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@ -78,11 +78,11 @@ NtQueryInformationProcess(IN HANDLE ProcessHandle,
PVM_COUNTERS VmCounters = (PVM_COUNTERS)ProcessInformation;
PIO_COUNTERS IoCounters = (PIO_COUNTERS)ProcessInformation;
PQUOTA_LIMITS QuotaLimits = (PQUOTA_LIMITS)ProcessInformation;
PROCESS_DEVICEMAP_INFORMATION_EX DeviceMap;
PUNICODE_STRING ImageName;
ULONG Cookie, ExecuteOptions = 0;
ULONG_PTR Wow64 = 0;
PROCESS_VALUES ProcessValues;
ULONG Flags;
PAGED_CODE();
/* Check for user-mode caller */
@ -577,7 +577,7 @@ NtQueryInformationProcess(IN HANDLE ProcessHandle,
{
PPROCESS_DEVICEMAP_INFORMATION_EX DeviceMapEx = ProcessInformation;
DeviceMap.Flags = DeviceMapEx->Flags;
Flags = DeviceMapEx->Flags;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
@ -592,7 +592,7 @@ NtQueryInformationProcess(IN HANDLE ProcessHandle,
}
/* Only one flag is supported and it needs LUID mappings */
if ((DeviceMap.Flags & ~PROCESS_LUID_DOSDEVICES_ONLY) != 0 ||
if ((Flags & ~PROCESS_LUID_DOSDEVICES_ONLY) != 0 ||
!ObIsLUIDDeviceMapsEnabled())
{
Status = STATUS_INVALID_PARAMETER;
@ -608,7 +608,7 @@ NtQueryInformationProcess(IN HANDLE ProcessHandle,
}
/* No flags for standard call */
DeviceMap.Flags = 0;
Flags = 0;
}
/* Set the return length */
@ -624,19 +624,9 @@ NtQueryInformationProcess(IN HANDLE ProcessHandle,
if (!NT_SUCCESS(Status)) break;
/* Query the device map information */
ObQueryDeviceMapInformation(Process, (PPROCESS_DEVICEMAP_INFORMATION)&DeviceMap, DeviceMap.Flags);
/* Enter SEH for writing back data */
_SEH2_TRY
{
RtlCopyMemory(ProcessInformation, &DeviceMap, sizeof(PROCESS_DEVICEMAP_INFORMATION));
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Get the exception code */
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
Status = ObQueryDeviceMapInformation(Process,
ProcessInformation,
Flags);
/* Dereference the process */
ObDereferenceObject(Process);