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NtRemoveIoCompletion: didn't check for possible NTSTATUS codes returned from KeRemoveQueue

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Spotted by GvG

svn path=/trunk/; revision=12268
This commit is contained in:
Gunnar Dalsnes
2004-12-21 02:34:32 +00:00
parent ff32df1937
commit 93af2278c0
1 changed files with 38 additions and 20 deletions
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reactos/ntoskrnl/io/iocomp.c
+38 -20
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@@ -279,6 +279,8 @@ NtRemoveIoCompletion(
{
PKQUEUE Queue;
NTSTATUS Status;
PIO_COMPLETION_PACKET Packet;
PLIST_ENTRY ListEntry;
Status = ObReferenceObjectByHandle( IoCompletionHandle,
IO_COMPLETION_MODIFY_STATE,
@@ -286,29 +288,45 @@ NtRemoveIoCompletion(
UserMode,
(PVOID*)&Queue,
NULL);
if (NT_SUCCESS(Status))
if (!NT_SUCCESS(Status))
{
PIO_COMPLETION_PACKET Packet;
PLIST_ENTRY ListEntry;
/*
Try 2 remove packet from queue. Wait (optionaly) if
no packet in queue or max num of threads allready running.
*/
ListEntry = KeRemoveQueue(Queue, UserMode, Timeout );
ObDereferenceObject(Queue);
Packet = CONTAINING_RECORD(ListEntry, IO_COMPLETION_PACKET, ListEntry);
if (CompletionKey) *CompletionKey = Packet->Key;
if (CompletionContext) *CompletionContext = Packet->Context;
if (IoStatusBlock) *IoStatusBlock = Packet->IoStatus;
ExFreeToNPagedLookasideList(&IoCompletionPacketLookaside, Packet);
return Status;
}
return Status;
/*
Try 2 remove packet from queue. Wait (optionaly) if
no packet in queue or max num of threads allready running.
*/
do {
ListEntry = KeRemoveQueue(Queue, UserMode, Timeout );
/* Nebbets book says nothing about NtRemoveIoCompletion returning STATUS_USER_APC,
and the umode equivalent GetQueuedCompletionStatus says nothing about this either,
so my guess it we should restart the operation. Need further investigation. -Gunnar
*/
} while((NTSTATUS)ListEntry == STATUS_USER_APC);
ObDereferenceObject(Queue);
if ((NTSTATUS)ListEntry == STATUS_TIMEOUT)
{
return STATUS_TIMEOUT;
}
ASSERT(ListEntry);
Packet = CONTAINING_RECORD(ListEntry, IO_COMPLETION_PACKET, ListEntry);
if (CompletionKey) *CompletionKey = Packet->Key;
if (CompletionContext) *CompletionContext = Packet->Context;
if (IoStatusBlock) *IoStatusBlock = Packet->IoStatus;
ExFreeToNPagedLookasideList(&IoCompletionPacketLookaside, Packet);
return STATUS_SUCCESS;
}