Bugcheck using KeReleaseMutex

NTFSD
1

Hi,

I am using a mutex like this:

…
KeWaitForMutexObject( &Mutex, UserRequest, KernelMode, TRUE, NULL );
status = IoCallDriver(pEngine->DeviceObject, NewIrp);

if (status == STATUS_PENDING)
KeWaitForSingleObject(&Event, UserRequest, UserMode, TRUE, NULL);
KeReleaseMutex( &Mutex, FALSE );
…

While calling “KeReleaseMutex” I get a bugcheck “IRQL_NOT_LESS_OR_EQUAL”.
The call stack is:

ntoskernel!ZwYieldExecution+…
ntoskernel!ZwYieldExecution+…
ntoskernel!KeReleaseMutant+…
ntoskernel!KeReleaseMutex+…
mydriver!MyFunction+…

What am I doing wrong here? I veryfied the Irql…it’s at passive level
(0).
Any hint would be greatly appreciated!

2

This can happen if your mutex is in pageable memory. What kind of
memory is it in? The mutex has a spinlock in it so it must be in
non-pageable memory.

Neal Christiansen
Microsoft File System Filter Group

This posting is provided “AS IS” with no warranties, and confers no
rights.

-----Original Message-----
From: xxxxx@clever.ms [mailto:xxxxx@clever.ms]
Sent: Monday, October 21, 2002 8:55 AM
To: File Systems Developers
Subject: [ntfsd] Bugcheck using KeReleaseMutex

Hi,

I am using a mutex like this:

…
KeWaitForMutexObject( &Mutex, UserRequest, KernelMode, TRUE, NULL
);
status = IoCallDriver(pEngine->DeviceObject, NewIrp);

if (status == STATUS_PENDING)
KeWaitForSingleObject(&Event, UserRequest, UserMode, TRUE,
NULL);
KeReleaseMutex( &Mutex, FALSE );
…

While calling “KeReleaseMutex” I get a bugcheck
“IRQL_NOT_LESS_OR_EQUAL”.
The call stack is:

ntoskernel!ZwYieldExecution+…
ntoskernel!ZwYieldExecution+…
ntoskernel!KeReleaseMutant+…
ntoskernel!KeReleaseMutex+…
mydriver!MyFunction+…

What am I doing wrong here? I veryfied the Irql…it’s at passive level
(0).
Any hint would be greatly appreciated!

You are currently subscribed to ntfsd as: xxxxx@Windows.Microsoft.com
To unsubscribe send a blank email to %%email.unsub%%

3

Thank you very much, Neil. That was the right hint!

“File Systems Developers” schrieb am 22.10.02 03:49:42:
> This can happen if your mutex is in pageable memory. What kind of
> memory is it in? The mutex has a spinlock in it so it must be in
> non-pageable memory.
>
> Neal Christiansen
> Microsoft File System Filter Group
>
> This posting is provided “AS IS” with no warranties, and confers no
> rights.
>
> -----Original Message-----
> From: xxxxx@clever.ms [mailto:xxxxx@clever.ms]
> Sent: Monday, October 21, 2002 8:55 AM
> To: File Systems Developers
> Subject: [ntfsd] Bugcheck using KeReleaseMutex
>
> Hi,
>
> I am using a mutex like this:
>
> …
> KeWaitForMutexObject( &Mutex, UserRequest, KernelMode, TRUE, NULL
> );
> status = IoCallDriver(pEngine->DeviceObject, NewIrp);
>
> if (status == STATUS_PENDING)
> KeWaitForSingleObject(&Event, UserRequest, UserMode, TRUE,
> NULL);
> KeReleaseMutex( &Mutex, FALSE );
> …
>
> While calling “KeReleaseMutex” I get a bugcheck
> “IRQL_NOT_LESS_OR_EQUAL”.
> The call stack is:
>
> ntoskernel!ZwYieldExecution+…
> ntoskernel!ZwYieldExecution+…
> ntoskernel!KeReleaseMutant+…
> ntoskernel!KeReleaseMutex+…
> mydriver!MyFunction+…
>
> What am I doing wrong here? I veryfied the Irql…it’s at passive level
> (0).
> Any hint would be greatly appreciated!
>
>
>
>
>
>
> —
> You are currently subscribed to ntfsd as: xxxxx@Windows.Microsoft.com
> To unsubscribe send a blank email to %%email.unsub%%
>
>
> —
> You are currently subscribed to ntfsd as: xxxxx@clever.ms
> To unsubscribe send a blank email to %%email.unsub%%