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[NTOSKNRL]

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Add a missing NULL check in IoShutdownSystem

svn path=/trunk/; revision=56939
This commit is contained in:
Timo Kreuzer 2012-07-22 18:48:09 +00:00
parent dd12f74611
commit 189a83fdde
1 changed files with 17 additions and 14 deletions
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31
reactos/ntoskrnl/io/iomgr/device.c
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@ -136,10 +136,10 @@ IoShutdownSystem(IN ULONG Phase)
PIRP Irp;
KEVENT Event;
NTSTATUS Status;
/* Initialize an event to wait on */
KeInitializeEvent(&Event, NotificationEvent, FALSE);
/* What phase? */
if (Phase == 0)
{
@ -167,11 +167,14 @@ IoShutdownSystem(IN ULONG Phase)
NULL,
&Event,
&StatusBlock);
Status = IoCallDriver(DeviceObject, Irp);
if (Status == STATUS_PENDING)
if (Irp)
{
/* Wait on the driver */
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
Status = IoCallDriver(DeviceObject, Irp);
if (Status == STATUS_PENDING)
{
/* Wait on the driver */
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
}
}
/* Remove the flag */
@ -202,7 +205,7 @@ IoShutdownSystem(IN ULONG Phase)
/* Shutdown tape filesystems */
IopShutdownBaseFileSystems(&IopTapeFileSystemQueueHead);
/* Loop last-chance shutdown notifications */
ListEntry = ExInterlockedRemoveHeadList(&LastChanceShutdownListHead,
&ShutdownListLock);
@ -889,7 +892,7 @@ IoCreateDevice(IN PDRIVER_OBJECT DriverObject,
/* Set the Type and Size. Question: why is Size 0 on Windows? */
DeviceObjectExtension->Type = IO_TYPE_DEVICE_OBJECT_EXTENSION;
DeviceObjectExtension->Size = 0;
/* Initialize with Power Manager */
PoInitializeDeviceObject(DeviceObjectExtension);
@ -981,7 +984,7 @@ IoCreateDevice(IN PDRIVER_OBJECT DriverObject,
ASSERT((DriverObject->Flags & DRVO_UNLOAD_INVOKED) == 0);
CreatedDeviceObject->DriverObject = DriverObject;
IopEditDeviceList(DriverObject, CreatedDeviceObject, IopAdd);
/* Link with the power manager */
if (CreatedDeviceObject->Vpb) PoVolumeDevice(CreatedDeviceObject);
@ -1402,7 +1405,7 @@ IoRegisterLastChanceShutdownNotification(IN PDEVICE_OBJECT DeviceObject)
/* Set the DO */
Entry->DeviceObject = DeviceObject;
/* Reference it so it doesn't go away */
ObReferenceObject(DeviceObject);
@ -1433,7 +1436,7 @@ IoRegisterShutdownNotification(PDEVICE_OBJECT DeviceObject)
/* Set the DO */
Entry->DeviceObject = DeviceObject;
/* Reference it so it doesn't go away */
ObReferenceObject(DeviceObject);
@ -1457,7 +1460,7 @@ IoUnregisterShutdownNotification(PDEVICE_OBJECT DeviceObject)
PSHUTDOWN_ENTRY ShutdownEntry;
PLIST_ENTRY NextEntry;
KIRQL OldIrql;
/* Remove the flag */
DeviceObject->Flags &= ~DO_SHUTDOWN_REGISTERED;
@ -1480,7 +1483,7 @@ IoUnregisterShutdownNotification(PDEVICE_OBJECT DeviceObject)
/* Free the entry */
ExFreePoolWithTag(ShutdownEntry, TAG_SHUTDOWN_ENTRY);
/* Get rid of our reference to it */
ObDereferenceObject(DeviceObject);
}
@ -1507,7 +1510,7 @@ IoUnregisterShutdownNotification(PDEVICE_OBJECT DeviceObject)
/* Free the entry */
ExFreePoolWithTag(ShutdownEntry, TAG_SHUTDOWN_ENTRY);
/* Get rid of our reference to it */
ObDereferenceObject(DeviceObject);
}