Hesham/wintun
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Do not call NdisMPauseComplete before TunPause returns

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Otherwise we trigger a bugcheck on Server 2019.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2019-03-29 21:42:46 +01:00
parent 7b3ea2a8a9
commit bba0f6aecf
1 changed files with 15 additions and 14 deletions
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27
wintun.c
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@ -179,13 +179,14 @@ static NTSTATUS TunCheckForPause(_Inout_ TUN_CTX *ctx, _In_ LONG64 increment)
}
_IRQL_requires_max_(DISPATCH_LEVEL)
static NDIS_STATUS TunCompletePause(_Inout_ TUN_CTX *ctx, _In_ LONG64 decrement)
static NDIS_STATUS TunCompletePause(_Inout_ TUN_CTX *ctx, _In_ LONG64 decrement, _In_ BOOLEAN async_completion)
{
ASSERT(decrement <= InterlockedGet64(&ctx->ActiveTransactionCount));
if (!InterlockedSubtract64(&ctx->ActiveTransactionCount, decrement) &&
InterlockedCompareExchange((LONG *)&ctx->State, TUN_STATE_PAUSED, TUN_STATE_PAUSING) == TUN_STATE_PAUSING) {
InterlockedExchange64(&ctx->Device.RefCount, 0);
TunIndicateStatus(ctx);
if (async_completion)
NdisMPauseComplete(ctx->MiniportAdapterHandle);
return NDIS_STATUS_SUCCESS;
}
@ -259,7 +260,7 @@ static VOID TunCsqCompleteCanceledIrp(IO_CSQ *Csq, IRP *Irp)
{
TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
TunCompleteRequest(Irp, 0, STATUS_CANCELLED);
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
}
_IRQL_requires_same_
@ -334,7 +335,7 @@ retry:
if (!NT_SUCCESS(status)) {
irp->IoStatus.Status = status;
IoCompleteRequest(irp, IO_NETWORK_INCREMENT);
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
goto retry;
}
@ -399,7 +400,7 @@ static BOOLEAN TunNBLRefDec(_Inout_ TUN_CTX *ctx, _Inout_ NET_BUFFER_LIST *nbl,
NET_BUFFER_LIST_NEXT_NBL(nbl) = NULL;
NdisMSendNetBufferListsComplete(ctx->MiniportAdapterHandle, nbl, SendCompleteFlags);
InterlockedSubtract(&ctx->PacketQueue.NumNbl, 1);
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
return TRUE;
}
return FALSE;
@ -556,7 +557,7 @@ static void TunQueueProcess(_Inout_ TUN_CTX *ctx)
} else {
irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(irp, IO_NETWORK_INCREMENT);
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
irp = NULL;
}
@ -585,7 +586,7 @@ static NTSTATUS TunDispatchCreate(DEVICE_OBJECT *DeviceObject, IRP *Irp)
TunIndicateStatus(ctx);
cleanup_TunCompletePause:
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
cleanup_complete_req:
TunCompleteRequest(Irp, 0, status);
return status;
@ -611,7 +612,7 @@ static NTSTATUS TunDispatchClose(DEVICE_OBJECT *DeviceObject, IRP *Irp)
TunIndicateStatus(ctx);
cleanup_TunCompletePause:
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
cleanup_complete_req:
TunCompleteRequest(Irp, 0, status);
return status;
@ -642,11 +643,11 @@ static NTSTATUS TunDispatchRead(DEVICE_OBJECT *DeviceObject, IRP *Irp)
TunQueueProcess(ctx);
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
return STATUS_PENDING;
cleanup_TunCompletePause:
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
cleanup_complete_req:
TunCompleteRequest(Irp, 0, status);
return status;
@ -777,7 +778,7 @@ static NTSTATUS TunDispatchWrite(DEVICE_OBJECT *DeviceObject, IRP *Irp)
information = b - buffer;
cleanup_TunCompletePause:
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
cleanup_complete_req:
TunCompleteRequest(Irp, information, status);
return status;
@ -807,7 +808,7 @@ static NTSTATUS TunDispatchCleanup(DEVICE_OBJECT *DeviceObject, IRP *Irp)
}
cleanup_TunCompletePause:
TunCompletePause(ctx, count);
TunCompletePause(ctx, count, TRUE);
cleanup_complete_req:
TunCompleteRequest(Irp, 0, status);
return status;
@ -855,7 +856,7 @@ static NDIS_STATUS TunPause(NDIS_HANDLE MiniportAdapterContext, PNDIS_MINIPORT_P
TunCompleteRequest(pending_irp, 0, STATUS_CANCELLED);
}
return TunCompletePause(ctx, count);
return TunCompletePause(ctx, count, FALSE);
}
static MINIPORT_RESTART TunRestart;
@ -1373,7 +1374,7 @@ static void TunSendNetBufferLists(NDIS_HANDLE MiniportAdapterContext, NET_BUFFER
TunQueueProcess(ctx);
cleanup_TunCompletePause:
TunCompletePause(ctx, 1);
TunCompletePause(ctx, 1, TRUE);
}
DRIVER_INITIALIZE DriverEntry;