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Added ProbeForWrite() buffer writable check routine for Irp->UserBuffer in the See driver. The See driver is a legacy driver for packet capturing with NDIS 5.x (Windows 2000 or XP). It is based on the source code of WinPcap.

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This commit is contained in:
Daiyuu Nobori 2019-05-28 10:36:31 +09:00
parent a3c29fbca6
commit 18cfe18950
1 changed files with 52 additions and 16 deletions
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68
src/See/Packet.c
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@ -668,6 +668,8 @@ NTSTATUS NPF_IoControl(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
PUINT pStats; PUINT pStats;
ULONG Information = 0; ULONG Information = 0;
BOOLEAN check_ok;
IF_LOUD(DbgPrint("NPF: IoControl\n");) IF_LOUD(DbgPrint("NPF: IoControl\n");)
IrpSp = IoGetCurrentIrpStackLocation(Irp); IrpSp = IoGetCurrentIrpStackLocation(Irp);
@ -686,22 +688,39 @@ NTSTATUS NPF_IoControl(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
EXIT_FAILURE(0); EXIT_FAILURE(0);
} }
pStats = (PUINT)(Irp->UserBuffer); check_ok = TRUE;
__try
pStats[3] = 0;
pStats[0] = 0;
pStats[1] = 0;
pStats[2] = 0; // Not yet supported
for(i = 0 ; i < NCpu ; i++)
{ {
ProbeForWrite(Irp->UserBuffer, IrpSp->Parameters.DeviceIoControl.OutputBufferLength, 1);
pStats[3] += Open->CpuData[i].Accepted; }
pStats[0] += Open->CpuData[i].Received; __except (EXCEPTION_EXECUTE_HANDLER)
pStats[1] += Open->CpuData[i].Dropped; {
pStats[2] += 0; // Not yet supported check_ok = FALSE;
}
if (check_ok == FALSE)
{
EXIT_FAILURE(0);
}
else
{
pStats = (PUINT)(Irp->UserBuffer);
pStats[3] = 0;
pStats[0] = 0;
pStats[1] = 0;
pStats[2] = 0; // Not yet supported
for(i = 0 ; i < NCpu ; i++)
{
pStats[3] += Open->CpuData[i].Accepted;
pStats[0] += Open->CpuData[i].Received;
pStats[1] += Open->CpuData[i].Dropped;
pStats[2] += 0; // Not yet supported
}
EXIT_SUCCESS(4*sizeof(UINT));
} }
EXIT_SUCCESS(4*sizeof(UINT));
break; break;
@ -711,9 +730,26 @@ NTSTATUS NPF_IoControl(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
EXIT_FAILURE(0); EXIT_FAILURE(0);
} }
RtlCopyMemory(Irp->UserBuffer,(Open->ReadEventName.Buffer)+18,26); check_ok = TRUE;
__try
{
ProbeForWrite(Irp->UserBuffer, IrpSp->Parameters.DeviceIoControl.OutputBufferLength, 1);
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
check_ok = FALSE;
}
EXIT_SUCCESS(26); if (check_ok == FALSE)
{
EXIT_FAILURE(0);
}
else
{
RtlCopyMemory(Irp->UserBuffer,(Open->ReadEventName.Buffer)+18,26);
EXIT_SUCCESS(26);
}
break; break;