problem

I'm using the NAS backup plugin to backup VMs to a CIFS network share.

When I press "Restore Instance backup" from a VM backup the restore job fails with error "Error restoring VM from backup [{"externalId":"i-4-18-VM/2026.02.19.12.15.46","name":"back1","uuid":"a3669c69-58d4-4ff3-ab75-e58427b16624","vmId":18}].".

The KVM host agent log reports:

2026-02-19 14:29:46,684 WARN  [utils.script.Script] (AgentRequest-Handler-1:[]) (logid:2d706b21) Execution of process [1547333] for command [/bin/bash -c sudo mount -t cifs \\bkcloudstack.unipd.it\cloudstack /usr/share/cloudstack-agent/tmp/csbackup.UkQyW10877532893870504995 -o username=cloudstack,password=XXX ] failed.
2026-02-19 14:29:46,684 WARN  [utils.script.Script] (AgentRequest-Handler-1:[]) (logid:2d706b21) Process [1547333] for command [/bin/bash -c sudo mount -t cifs \\bkcloudstack.unipd.it\cloudstack /usr/share/cloudstack-agent/tmp/csbackup.UkQyW10877532893870504995 -o username=cloudstack,password=XXX ] encountered the error: [1].
2026-02-19 14:29:46,684 ERROR [resource.wrapper.LibvirtRestoreBackupCommandWrapper] (AgentRequest-Handler-1:[]) (logid:2d706b21) Failed to mount repository {} of type {} to the directory {}

The KVM host journal reports:
Feb 19 14:29:46 emi2 sudo[1547333]: root : PWD=/ ; USER=root ; COMMAND=/bin/mount -t cifs \\bkcloudstack.unipd.itcloudstack /usr/share/cloudstack-agent/tmp/csbackup.UkQyW10877532893870504995 -o username=cloudstack,password=XXX,nobrl

The network path in the sudo mount command is wrong. It should be something like \\\\bkcloudstack.unipd.it\\cloudstack or //bkcloudstack.unipd.it/cloudstack

versions

CloudStack 4.22.0.0
Rocky Linux 10

The steps to reproduce the bug

1. backup the VM
2. stop the VM
3. select the backup and press "Restore Instance backup"

What to do about it?

No response