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Bug 1941398 - virt-viewer display a white screen after input an empty password for a vnc vm in kiosk mode
Summary: virt-viewer display a white screen after input an empty password for a vnc vm...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: virt-viewer
Version: 8.5
Hardware: Unspecified
OS: Unspecified
low
medium
Target Milestone: rc
: ---
Assignee: Victor Toso
QA Contact: Virtualization Bugs
URL:
Whiteboard:
: 1941264 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-03-22 04:14 UTC by zhoujunqin
Modified: 2022-09-22 07:27 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-09-22 07:27:54 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
screenshot for white screen (10.44 KB, image/png)
2021-03-22 04:15 UTC, zhoujunqin 		no flags Details
View All

Description zhoujunqin 2021-03-22 04:14:36 UTC 
Description of problem:
virt-viewer display a white screen after input an empty password for a vnc vm in kiosk mode

Version-Release number of selected component (if applicable):
virt-viewer-9.0-10.el8.x86_64
libgovirt-0.3.7-4.el8.x86_64
gtk-vnc2-0.9.0-2.el8.x86_64


How reproducible:
100%

Steps to Reproduce:

1. Prepare a vnc guest with authentication required.

# virsh dumpxml rhel8-vnc --security-info --inactive 
...
    <graphics type='vnc' port='-1' autoport='yes' passwd='aabb'>
      <listen type='address'/>
    </graphics>


2. Open the vm by "virt-viewer $guest -k" in the kiosk mode, and then input an empty password after the authentication dialog pops up.

$ virt-viewer -c qemu:///system  rhel7.9-vnc -k

Test result:
After I input an empty password on the authentication dialog, then click "OK".
virt-viewer will show an error message as follows:

------------------------------------------------------
Unable to connect to the graphic server 127.0.0.1:5902
Unknown authentication failure: %s: Weak encryption key
------------------------------------------------------

Click 'OK', then virt-viewer will display a white screen, details please see the attachment.

What's more, without in kiosk mode, if I input an empty password, then virt-viewer prompts the above error message, 
but after click 'OK', virt-viewer will exit silently.

Actual results:
As described.

Expected results:
virt-viewer should get another chance to retry again in kiosk mode.

Additional info:
Comment 1 zhoujunqin 2021-03-22 04:15:26 UTC 
Created attachment 1765137 [details]
screenshot for white screen
Comment 3 Daniel Berrangé 2021-12-02 15:28:32 UTC 
With latest 1.3.0 release of gtk-vnc we now honour the empty password again correctly, so we wouldn't hit this specific problem.
Comment 5 Victor Toso 2022-08-25 10:23:11 UTC 
*** Bug 1941264 has been marked as a duplicate of this bug. ***
Comment 6 Victor Toso 2022-08-25 10:26:43 UTC 
Too short on time to fix this in 8.7. We can either backport or rebase gtk-vnc fix but in 8.8.
I'll assign it to myself.
Comment 7 RHEL Program Management 2022-09-22 07:27:54 UTC 
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.
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