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bug check code 0x0000000a Citrix ELM 1907

Campbell Kay


Hi Guys,


i had MS debug a BSOD screen for me as below 



Computer Name: NZBVDA05

Windows 10 Kernel Version 14393 MP (8 procs) Free x64

Product: Server, suite: TerminalServer DataCenter

Built by: 14393.3115.amd64fre.rs1_release_1.190708-1703

Kernel base = 0xfffff803`55005000 PsLoadedModuleList = 0xfffff803`55308040

Debug session time: Mon Aug  5 16:48:58.397 2019 (UTC - 7:00)

System Uptime: 0 days 4:47:38.436

SystemManufacturer = Microsoft Corporation

SystemProductName = Virtual Machine

Processor: Intel(R) Xeon(R) Platinum 8168 CPU @ 2.70GHz

Bugcheck: A (0, 2, 0, FFFFF8035507F0DC)

Kernel Complete Dump File: Full address space is available.

dps ffffbb0034a4f030-0x20

ffffbb00`34a4f010  ffffbb00`34a4f020

ffffbb00`34a4f018  00000000`00000018

ffffbb00`34a4f020  00000000`00007370

ffffbb00`34a4f028  fffff805`142e0b80 unifltr+0x80b80

ffffbb00`34a4f030  00000000`000088f0

ffffbb00`34a4f038  fffff803`55106919 nt!KeAcquireSpinLockRaiseToDpc+0x39

ffffbb00`34a4f040  ffffa1d6`a186692c

ffffbb00`34a4f048  00000000`00010002

ffffbb00`34a4f050  00000000`00000000

ffffbb00`34a4f058  00000000`00000000

ffffbb00`34a4f060  ffffd00a`b27f2ef0

ffffbb00`34a4f068  00000000`00000000

ffffbb00`34a4f070  00000000`00000000

ffffbb00`34a4f078  00000000`00000001

ffffbb00`34a4f080  00000000`0853fda0

ffffbb00`34a4f088  00000000`00000000

start             end                 module name

fffff805`14260000 fffff805`142f1000   unifltr    (no symbols)          

    Loaded symbol image file: unifltr.sys

    Image path: \SystemRoot\system32\DRIVERS\unifltr.sys

    Image name: unifltr.sys

    Browse all global symbols  functions  data

    Timestamp:        Sat May 25 06:41:39 2019 (5CE94613)

    CheckSum:         00098FDC

    ImageSize:        00091000

    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

    Information from resource tables:


Has anyone seen this? i have had a case open with Citrix support for along time and still no fix.


if i disable elastic layering will that remove that unifltr.sys driver? 


This is happening every day to at least one Citrix server in my farm.  the server is an Azure server, not sure if that makes any difference.




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