Bad pool caller error

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck C2, {0, 0, 1, 6e557641}

*** WARNING: Unable to verify timestamp for aswSP.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSP.SYS
[COLOR=#ff0000]Probably caused by : aswSP.SYS[/COLOR] ( aswSP+2caf3 )

Followup: MachineOwner
---------

1: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

BAD_POOL_CALLER (c2)
The current thread is making a bad pool request.  Typically this is at a bad IRQL level or double freeing the same allocation, etc.
Arguments:
Arg1: 00000000, The caller is requesting a zero byte pool allocation.
Arg2: 00000000, zero.
Arg3: 00000001, the pool type being allocated.
Arg4: 6e557641, the pool tag being used.

Debugging Details:
------------------


BUGCHECK_STR:  0xc2_0

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN8_DRIVER_FAULT

PROCESS_NAME:  explorer.exe

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 81a0205d to 819d8b98

STACK_TEXT:  
ba7f03ec 81a0205d 000000c2 00000000 00000000 nt!KeBugCheckEx
ba7f0450 90f7caf3 800030f4 00000000 00000000 nt!ExAllocatePoolWithTag+0x57
WARNING: Stack unwind information not available. Following frames may be wrong.
ba7f0460 00000000 ba7f04f0 90f7cb32 00000001 aswSP+0x2caf3


STACK_COMMAND:  kb

FOLLOWUP_IP: 
aswSP+2caf3
90f7caf3 ??              ???

SYMBOL_STACK_INDEX:  2

SYMBOL_NAME:  aswSP+2caf3

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: aswSP

IMAGE_NAME:  aswSP.SYS

DEBUG_FLR_IMAGE_TIMESTAMP:  50905821

FAILURE_BUCKET_ID:  0xc2_0_aswSP+2caf3

BUCKET_ID:  0xc2_0_aswSP+2caf3

Followup: MachineOwner
---------

1: kd> lmvm aswSP
start    end        module name
90f50000 90fa5880   aswSP    T (no symbols)           
    Loaded symbol image file: aswSP.SYS
    Image path: \SystemRoot\System32\Drivers\aswSP.SYS
[COLOR=#ff0000]    Image name: aswSP.SYS
    Timestamp:        Wed Oct 31 04:13:45 2012[/COLOR] (50905821)
    CheckSum:         000650A2
    ImageSize:        00055880
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4