Microsoft Azure Site Recovery (ASR) "involflt" kernel module causes an unexpected restart

This document (000021004) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server for SAP Applications 15 Service Pack 3
Microsoft Azure Site Recovery (ASR)

Situation

The Microsoft Azure Site Recovery (ASR) "involflt" kernel module causes an unexpected restart of an Azure instance.

This behavior was observed with the following installed kernel package version:

   "kernel-default-5.3.18-150300.59.109.1"

in combination with the following installed Microsoft Azure Site Recovery version:

   Version - 9.52.1.6591

-

Additional information and output from command:

# /usr/bin/journalctl --no-pager --boot 0

<snip>

Jan 29 18:21:56 sapers4 kernel: Linux version 5.3.18-150300.59.109-default (geeko@buildhost) (gcc version 7.5.0 (SUSE Linux)) #1 SMP Fri Jan 20 14:56:23 UTC 2023 (0ef4714)
Jan 29 18:21:56 sapers4 kernel: Command line: BOOT_IMAGE=/vmlinuz-5.3.18-150300.59.109-default root=UUID=1301be1a-d7e1-4309-8e72-ed587f4bcea1 intel_idle.max_cstate=1 processor.max_cstate=1 USE_BY_UUID_DEVICE_NAMES=1 earlyprintk=ttyS0 console=ttyS0 rootdelay=300 net.ifnames=0 dis_ucode_ldr scsi_mod.use_blk_mq=1 multipath=off numa_balancing=disable transparent_hugepage=never
.
.
Jan 29 18:21:56 sapers4 kernel: involflt: loading out-of-tree module taints kernel.
Jan 29 18:21:56 sapers4 kernel: involflt: module license 'Propreitary' taints kernel.
Jan 29 18:21:56 sapers4 kernel: Disabling lock debugging due to kernel taint
Jan 29 18:21:56 sapers4 kernel: involflt: module verification failed: signature and/or required key missing - tainting kernel
Jan 29 18:21:56 sapers4 kernel: involflt[involflt_init:3323 (INFO)]: Version - 9.52.1.6591

</snip>

Resolution

There are at least two possible workarounds:

1- Reboot from previously installed kernel version
2- Disable Microsoft Azure Site Recovery (ASR) extension

Cause

The kernel version "5.3.18-150300.59.109-default" was not tested in combination with the used Microsoft Azure Site Recovery (ASR) version - 9.52.1.6591.

Additional Information

This issue is reported to our partner Microsoft.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.