APC not disabled in check build

NTFSD
1

While unloading my driver I call IoUnregisterFsRetgistrationChange

The check build gives a bug check indicating APCs should be diaabled.

Is this really true? I don’t find it in the documentation anywhere.

Thanks,

Ken

EX: resource: APCs still enabled before resource 80B1F040 acquire !!!

Break instruction exception - code 80000003 (first chance)

nt!DbgBreakPoint:

80ae0cf0 cc int 3

1: kd> kv

ChildEBP RetAddr Args to Child

f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO: [0,0,0])

f8218af8 80aee62e 80ae0f00 80b1f040 814be020
nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])

f8218b24 80c6120e 80b1f040 00000001 8170a2c0
nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])

f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2
nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])

f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0
RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]

f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38
RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]

f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO:
[Non-Fpo])

f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90
nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])

f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665
(FPO: [Non-Fpo])

f8218d28 80afbc92 000004c0 00000000 00000000 nt!NtDeviceIoControlFile+0x28
(FPO: [Non-Fpo])

f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f (FPO:
[0,3] TrapFrame @ f8218d64)

0012f470 77f2ee58 77e3fde6 000004c0 00000000
SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])

0012f474 77e3fde6 000004c0 00000000 00000000 ntdll!NtDeviceIoControlFile+0xc
(FPO: [10,0,0])

0012f4d8 00403d5a 000004c0 0008282c 0012f54c kernel32!DeviceIoControl+0x12f
(FPO: [Non-Fpo])

WARNING: Stack unwind information not available. Following frames may be
wrong.

00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a

2

Ken,

Disabling APCs is the responsibility of the code that acquires the lock

  • thus, it suggests that the routine calling
    ExAcquireResourceExclusiveLite needs to block APCs. Sounds like a bug
    in the I/O Manager routine itself, in that case.

Work-around would be to do it yourself - call FsRtlEnterFileSystem
around your deregistration call.

Regards,

Tony

Tony Mason

Consulting Partner

OSR Open Systems Resources, Inc.

http://www.osr.com http:</http:>

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Friday, December 03, 2004 2:51 PM
To: ntfsd redirect
Subject: [ntfsd] APC not disabled in check build

While unloading my driver I call IoUnregisterFsRetgistrationChange

The check build gives a bug check indicating APCs should be diaabled.

Is this really true? I don’t find it in the documentation anywhere.

Thanks,

Ken

EX: resource: APCs still enabled before resource 80B1F040 acquire !!!

Break instruction exception - code 80000003 (first chance)

nt!DbgBreakPoint:

80ae0cf0 cc int 3

1: kd> kv

ChildEBP RetAddr Args to Child

f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO:
[0,0,0])

f8218af8 80aee62e 80ae0f00 80b1f040 814be020
nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])

f8218b24 80c6120e 80b1f040 00000001 8170a2c0
nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])

f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2
nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])

f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0
RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]

f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38
RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]

f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO:
[Non-Fpo])

f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90
nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])

f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665
(FPO: [Non-Fpo])

f8218d28 80afbc92 000004c0 00000000 00000000
nt!NtDeviceIoControlFile+0x28 (FPO: [Non-Fpo])

f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f
(FPO: [0,3] TrapFrame @ f8218d64)

0012f470 77f2ee58 77e3fde6 000004c0 00000000
SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])

0012f474 77e3fde6 000004c0 00000000 00000000
ntdll!NtDeviceIoControlFile+0xc (FPO: [10,0,0])

0012f4d8 00403d5a 000004c0 0008282c 0012f54c
kernel32!DeviceIoControl+0x12f (FPO: [Non-Fpo])

WARNING: Stack unwind information not available. Following frames may be
wrong.

00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

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3

Ken,

What OS version are you seeing this on?

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Friday, December 03, 2004 11:51 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] APC not disabled in check build

While unloading my driver I call IoUnregisterFsRetgistrationChange

The check build gives a bug check indicating APCs should be diaabled.

Is this really true? I don’t find it in the documentation anywhere.

Thanks,

Ken

EX: resource: APCs still enabled before resource 80B1F040 acquire !!!

Break instruction exception - code 80000003 (first chance)

nt!DbgBreakPoint:

80ae0cf0 cc int 3

1: kd> kv

ChildEBP RetAddr Args to Child

f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO:
[0,0,0])

f8218af8 80aee62e 80ae0f00 80b1f040 814be020
nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])

f8218b24 80c6120e 80b1f040 00000001 8170a2c0
nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])

f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2
nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])

f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0
RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]

f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38
RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]

f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO:
[Non-Fpo])

f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90
nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])

f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665
(FPO: [Non-Fpo])

f8218d28 80afbc92 000004c0 00000000 00000000
nt!NtDeviceIoControlFile+0x28 (FPO: [Non-Fpo])

f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f
(FPO: [0,3] TrapFrame @ f8218d64)

0012f470 77f2ee58 77e3fde6 000004c0 00000000
SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])

0012f474 77e3fde6 000004c0 00000000 00000000
ntdll!NtDeviceIoControlFile+0xc (FPO: [10,0,0])

0012f4d8 00403d5a 000004c0 0008282c 0012f54c
kernel32!DeviceIoControl+0x12f (FPO: [Non-Fpo])

WARNING: Stack unwind information not available. Following frames may be
wrong.

00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument:
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4

W2K3 rtm Checked build.

It was a checked build assert.

From: Neal Christiansen [mailto:xxxxx@windows.microsoft.com]
Sent: Monday, December 06, 2004 1:05 AM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

Ken,

What OS version are you seeing this on?

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Friday, December 03, 2004 11:51 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] APC not disabled in check build

While unloading my driver I call IoUnregisterFsRetgistrationChange

The check build gives a bug check indicating APCs should be diaabled.

Is this really true? I don’t find it in the documentation anywhere.

Thanks,

Ken

EX: resource: APCs still enabled before resource 80B1F040 acquire !!!

Break instruction exception - code 80000003 (first chance)

nt!DbgBreakPoint:

80ae0cf0 cc int 3

1: kd> kv

ChildEBP RetAddr Args to Child

f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO: [0,0,0])

f8218af8 80aee62e 80ae0f00 80b1f040 814be020
nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])

f8218b24 80c6120e 80b1f040 00000001 8170a2c0
nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])

f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2
nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])

f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0
RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]

f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38
RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]

f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO:
[Non-Fpo])

f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90
nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])

f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665
(FPO: [Non-Fpo])

f8218d28 80afbc92 000004c0 00000000 00000000 nt!NtDeviceIoControlFile+0x28
(FPO: [Non-Fpo])

f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f (FPO:
[0,3] TrapFrame @ f8218d64)

0012f470 77f2ee58 77e3fde6 000004c0 00000000
SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])

0012f474 77e3fde6 000004c0 00000000 00000000 ntdll!NtDeviceIoControlFile+0xc
(FPO: [10,0,0])

0012f4d8 00403d5a 000004c0 0008282c 0012f54c kernel32!DeviceIoControl+0x12f
(FPO: [Non-Fpo])

WARNING: Stack unwind information not available. Following frames may be
wrong.

00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
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5

Ken,

I agree with Tony’s analysis that this is a bug in the IO Manager. I have filed a bug to get this fixed in Longhorn.

Use the workaround that Tony suggested. Wrap your call with FsRtlEnterFileSystem

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Sunday, December 05, 2004 10:44 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

W2K3 rtm Checked build.
It was a checked build assert.

From: Neal Christiansen [mailto:xxxxx@windows.microsoft.com]
Sent: Monday, December 06, 2004 1:05 AM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

Ken,
?
What OS version are you seeing this on?
?

From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Friday, December 03, 2004 11:51 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] APC not disabled in check build
?
While unloading my driver I call IoUnregisterFsRetgistrationChange
The check build gives a bug check indicating APCs should be diaabled.
Is this really true? I don’t find it in the documentation anywhere.
?
Thanks,
Ken
?
?
?
EX: resource: APCs still enabled before resource 80B1F040 acquire !!!
Break instruction exception - code 80000003 (first chance)
nt!DbgBreakPoint:
80ae0cf0 cc??? int??? 3
1: kd> kv
ChildEBP RetAddr? Args to Child???
f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO: [0,0,0])
f8218af8 80aee62e 80ae0f00 80b1f040 814be020 nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])
f8218b24 80c6120e 80b1f040 00000001 8170a2c0 nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])
f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2 nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])
f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0 RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall) [c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]
f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38 RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall) [c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]
f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO: [Non-Fpo])
f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90 nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])
f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665 (FPO: [Non-Fpo])
f8218d28 80afbc92 000004c0 00000000 00000000 nt!NtDeviceIoControlFile+0x28 (FPO: [Non-Fpo])
f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f (FPO: [0,3] TrapFrame @ f8218d64)
0012f470 77f2ee58 77e3fde6 000004c0 00000000 SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])
0012f474 77e3fde6 000004c0 00000000 00000000 ntdll!NtDeviceIoControlFile+0xc (FPO: [10,0,0])
0012f4d8 00403d5a 000004c0 0008282c 0012f54c kernel32!DeviceIoControl+0x12f (FPO: [Non-Fpo])
WARNING: Stack unwind information not available. Following frames may be wrong.
00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a
?
?

Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
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6

Hi Neal (& Tony),

I did that and it works fine. I knew I could do it, but thought you’d want
to know.

Thanks,
Ken

-----Original Message-----
From: Neal Christiansen [mailto:xxxxx@windows.microsoft.com]
Sent: Monday, December 20, 2004 3:32 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

Ken,

I agree with Tony’s analysis that this is a bug in the IO Manager. I have
filed a bug to get this fixed in Longhorn.

Use the workaround that Tony suggested. Wrap your call with
FsRtlEnterFileSystem

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Sunday, December 05, 2004 10:44 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

W2K3 rtm Checked build.
It was a checked build assert.

From: Neal Christiansen [mailto:xxxxx@windows.microsoft.com]
Sent: Monday, December 06, 2004 1:05 AM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] APC not disabled in check build

Ken,
?
What OS version are you seeing this on?
?

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ken Galipeau
Sent: Friday, December 03, 2004 11:51 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] APC not disabled in check build
?
While unloading my driver I call IoUnregisterFsRetgistrationChange
The check build gives a bug check indicating APCs should be diaabled.
Is this really true? I don’t find it in the documentation anywhere.
?
Thanks,
Ken
?
?
?
EX: resource: APCs still enabled before resource 80B1F040 acquire !!!
Break instruction exception - code 80000003 (first chance)
nt!DbgBreakPoint:
80ae0cf0 cc??? int??? 3
1: kd> kv
ChildEBP RetAddr? Args to Child???
f8218af0 80aecb12 f8218b24 80aee62e 80ae0f00 nt!DbgBreakPoint (FPO: [0,0,0])
f8218af8 80aee62e 80ae0f00 80b1f040 814be020
nt!ExCheckIfKernelApcsShouldBeDisabled+0x38 (FPO: [Non-Fpo])
f8218b24 80c6120e 80b1f040 00000001 8170a2c0
nt!ExAcquireResourceExclusiveLite+0x70 (FPO: [Non-Fpo])
f8218b3c f7a53a47 816d0688 f7a4ac90 bf8a34b2
nt!IoUnregisterFsRegistrationChange+0x46 (FPO: [Non-Fpo])
f8218bc4 f7a681c8 8170a2c0 81af59c8 8170a2c0
RepliStor!OctopusDeviceControl+0x9b7 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\octoctrl.c @ 1809]
f8218c20 80a2673c 8170a2c0 81af59c8 81af5a38
RepliStor!OctopusIrpDispatch+0x178 (FPO: [Non-Fpo]) (CONV: stdcall)
[c:\dev\octmain\octopus\src\kernel\passthru.c @ 301]
f8218c3c 80c70bed 81af5a38 815adf90 81af59c8 nt!IofCallDriver+0x62 (FPO:
[Non-Fpo])
f8218c54 80c71b0d 8170a2c0 81af59c8 815adf90
nt!IopSynchronousServiceTail+0x159 (FPO: [Non-Fpo])
f8218cf4 80c673aa 000004c0 00000000 00000000 nt!IopXxxControlFile+0x665
(FPO: [Non-Fpo])
f8218d28 80afbc92 000004c0 00000000 00000000 nt!NtDeviceIoControlFile+0x28
(FPO: [Non-Fpo])
f8218d28 7ffe0304 000004c0 00000000 00000000 nt!KiSystemService+0x13f (FPO:
[0,3] TrapFrame @ f8218d64)
0012f470 77f2ee58 77e3fde6 000004c0 00000000
SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0])
0012f474 77e3fde6 000004c0 00000000 00000000 ntdll!NtDeviceIoControlFile+0xc
(FPO: [10,0,0])
0012f4d8 00403d5a 000004c0 0008282c 0012f54c kernel32!DeviceIoControl+0x12f
(FPO: [Non-Fpo])
WARNING: Stack unwind information not available. Following frames may be
wrong.
00000000 00000000 00000000 00000000 00000000 WINZIP32+0x3d5a
?
?

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
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