Bug 1317192 - kernel 4.4.4-200 denies console input on hvc0 xen servers
Summary: kernel 4.4.4-200 denies console input on hvc0 xen servers
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: systemd
Version: 22
Hardware: i686
OS: Linux
unspecified
urgent
Target Milestone: ---
Assignee: systemd-maint
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-03-12 22:24 UTC by customercare
Modified: 2016-07-19 18:56 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-07-19 18:56:51 UTC
Type: Bug


Attachments (Terms of Use)

Description customercare 2016-03-12 22:24:21 UTC
Description of problem:

kernel 4.4.4-200 denies console input coming from hvc0 
when running in paravirtualised mode on a  xen server i.e. Citrix.

I assume, it gets caused by "/etc/securetty" being deleted while updating something.

Version-Release number of selected component (if applicable):

4.4.4-200 PAE

How reproducible:

100%

Steps to Reproduce:
1. setup a xenserver
2. start a vm with that kernel
3. console does not take any input

Actual results:

/etc/securetty got deleted

Expected results:

do not touch it, if you do not know, which kind of environment your running in.

Additional info:

Comment 1 Josh Boyer 2016-03-13 01:00:32 UTC
The kernel doesn't do anything with the /etc/securetty.  If something deleted it, it was done in userspace.

Comment 2 Kevin Fenzi 2016-03-14 15:22:33 UTC
I don't see anything off hand that owns or creates this file, so I would expect once you put it in place it should stay there. 

Can you identify all the packages that were updated when the file disappeared?

Comment 3 customercare 2016-03-14 16:02:15 UTC
unfurtunatly those are productive servers, you do not check this until you need it and than it's too late :)

Maybe this observation helps you:

i freshly installed a FC23 on one of those serverimages.
Without a /etc/securetty file, i could enter into the console,
but it took 5-10 minutes after the system booted.


As i wrote this bugreport, i could not enter into a console for Kernel 4.4.4
BUT NOW .. a fews days later, it works, even without a /etc/securetty file.


O== Something else seems to cause the console input bug after a reboot. ==O

Whatever it is, it's nasty, as you normally do not reboot a server without a reason, and afterwards you wanne/must check things. Impossible if the network card isn't working. Which reminds of another unsolved network problem. But that another bugreport.

Comment 4 Kevin Fenzi 2016-03-15 19:50:32 UTC
So, this sounds to me like systemd isn't starting the getty on that console as it should (it's taking 5-10min to start instead of starting right away). 

(see: http://0pointer.de/blog/projects/serial-console.html )

Moving over to systemd folks for further debugging/comment...

Comment 5 Fedora End Of Life 2016-07-19 18:56:51 UTC
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.


Note You need to log in before you can comment on or make changes to this bug.