KeGetCurrentIrql fails

NTFSD
1

I have following code fragment in my driver:

if ( KeGetCurrentIrql() <= APC_LEVEL )
{
IoDeleteDevice( DeviceObject ); //bugcheck occurs here
}
else
{
//Queue it to workitem
}

The bugcheck IRQL_NOT_LESS_OR_EQUAL occurs at the IoDeleteDevice.

Bugcheck analysis shows that the IRQL = 00000002.
how could that happen?

Has anyone seen this happening. i.e. KeGetCurrentIrql returning
an incorrect irql or something.

2

Bugcheck analysis shows, the IRQL as DISPATCH, Please
make sure if u’r symbols are matching.
-Amol.

— Mani wrote:

> I have following code fragment in my driver:
>
> if ( KeGetCurrentIrql() <= APC_LEVEL )
> {
> IoDeleteDevice( DeviceObject ); //bugcheck occurs
> here
> }
> else
> {
> //Queue it to workitem
> }
>
> The bugcheck IRQL_NOT_LESS_OR_EQUAL occurs at the
> IoDeleteDevice.
>
> Bugcheck analysis shows that the IRQL = 00000002.
> how could that happen?
>
> Has anyone seen this happening. i.e.
> KeGetCurrentIrql returning
> an incorrect irql or something.
>
>
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as:
> xxxxx@yahoo.com
> To unsubscribe send a blank email to
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>

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3

yes. they match.

“Amol Tasgaonkar” wrote in message news:xxxxx@ntfsd…
>
> Bugcheck analysis shows, the IRQL as DISPATCH, Please
> make sure if u’r symbols are matching.
> -Amol.
>
> — Mani wrote:
>
> > I have following code fragment in my driver:
> >
> > if ( KeGetCurrentIrql() <= APC_LEVEL )
> > {
> > IoDeleteDevice( DeviceObject ); //bugcheck occurs
> > here
> > }
> > else
> > {
> > //Queue it to workitem
> > }
> >
> > The bugcheck IRQL_NOT_LESS_OR_EQUAL occurs at the
> > IoDeleteDevice.
> >
> > Bugcheck analysis shows that the IRQL = 00000002.
> > how could that happen?
> >
> > Has anyone seen this happening. i.e.
> > KeGetCurrentIrql returning
> > an incorrect irql or something.
> >
> >
> >
> > —
> > Questions? First check the IFS FAQ at
> > https://www.osronline.com/article.cfm?id=17
> >
> > You are currently subscribed to ntfsd as:
> > xxxxx@yahoo.com
> > To unsubscribe send a blank email to
> > xxxxx@lists.osr.com
> >
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>

4

I think the problem is in the DeviceObject , possibly you already called
IoDeleteDevice for it.
IoDeleteDevice acquires spin lock, therefore IRQL is 0x2.

“Mani” wrote in message news:xxxxx@ntfsd…
>I have following code fragment in my driver:
>
> if ( KeGetCurrentIrql() <= APC_LEVEL )
> {
> IoDeleteDevice( DeviceObject ); //bugcheck occurs here
> }
> else
> {
> //Queue it to workitem
> }
>
> The bugcheck IRQL_NOT_LESS_OR_EQUAL occurs at the IoDeleteDevice.
>
> Bugcheck analysis shows that the IRQL = 00000002.
> how could that happen?
>
> Has anyone seen this happening. i.e. KeGetCurrentIrql returning
> an incorrect irql or something.
>
>
>