[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-22 Thread Christian Tucker
The Nathaniel Priddy solution worked for me to - adding

d-i base-installer/kernel/image string linux-image-4.4.0-142-generic

to the preseed file just after the keyboard entry however I now have
a new issue.

When Grub loads it lists Ubuntu, Windows, Ubuntu 16.4.0"

If I select ubuntu it loads no problem - if I select Ubuntu 16.4 then it
crashes when loading

I think this is because ubuntu is expecting a different kernel version -
the problem is I have no idea how to fix that!

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-22 Thread Derekk
I tried Nathaniel Priddy solution and it works for me. Thanks N!

Hopefully a fix will be released soon.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-22 Thread Derekk
I am having the same issues as above using netboot via pixiecore.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-21 Thread HC Conan
Confirming the same issue as Nathaniel and Derek after using the updated
both initrd.gz and linux files from
http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-
amd64/current/images/netboot/ubuntu-installer/amd64/.

How to force it to use the 4.4.0.142 image in PXE boot? 
I am new to PXE. Where should I add "d-i base-installer/kernel/image string 
linux-image-4.4.0-142-generic"? My .cfg file does not conatin anything like 
"d-i".
Any info is appreciated.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-19 Thread Nathaniel Priddy
It looks like it might be related to the fact there there isn't a 
linux-signed-image-4.4.0-143-generic available? I was able to force it to use 
the 142 image by setting:
d-i base-installer/kernel/image string linux-image-4.4.0-142-generic

I could set the parameter preseed-kernel-image to linux-
image-4.4.0-142-generic for this to automatically execute. I was then
able to fully image using the xenial-updates.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-19 Thread Derek Gibson
Confirming the same issue as Nathaniel Priddy.

Using updated initrd/kernel from http://archive.ubuntu.com/ubuntu/dists
/xenial-updates/main/installer-amd64/current/images/netboot/ubuntu-
installer/amd64/

I get E: Unable to locate package linux-headers-signed-generic

Also using Foreman to provision.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-18 Thread Nathaniel Priddy
I'm currently using Foreman to provision machines. I've updated the
image to pull from xenial-updates, but now the installer is unable to
install the base system (the latest linux-headers-4.4.0-143). It's
specifically unable to find the linux-headers-signed-generic. I did not
have this issue before using the xenial-updates? Just pointing it to
us.archive.ubuntu.com/ubuntu. I'm not sure of where to get help with
this, but this is me specifically trying to use the xenial-updates
netboot install since the bug has been introduced with just xenial. Any
help is greatly appreciated.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-03-05 Thread Reinhard
Question:
If images in
http://archive.ubuntu.com/ubuntu/dists/xenial/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/
are broken for nearly all us and having about 30 postings in 2 threads, what is 
the reason to place the new images NOT in ...dists/xenial/main... ?
Or to give as at least a README.md in ...dists/xenial/main... ?
Thanks!

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-28 Thread Adam Conrad
Fixing older images is literally impossible.  If this bug were reported
before the fix already existed, the fix would have been to build and
publish a new netboot to -updates.  Given that a new (and working) one
already lives there, job done.  The reason I haven't closed it yet
(though, I should) is because it's much harder to find closed bugs, and
I'd rather people see this one than file duplicates.  At least for now.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-27 Thread Trent Lloyd
Can we get confirmation that this won't be fixed in terms of fixing
older images, and that the correct solution (as suggested by Adam
Conrad) is to update to the latest 'xenial-updates' netboot image?

And if so, change the bug status from Confirmed to something else (not
sure if Fix Released or Won't Fix is appropriate, given the general
issue is using the old netboot images)


>From a usability standpoint, I briefly considered if people are likely
to download netboot images from the "xenial" pocket rather than the
"xenial-updates" pocket which will no longer work. If someone navigates
to the archive manually that seems likely, however, on a search I have
found most of the documentation found with a quick google search for
"Ubuntu Netboot" points to the download location as
http://cdimage.ubuntu.com/netboot/xenial/ - which does point to the
xenial-updates pocket.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-26 Thread Danny Berg
Confirming the issue.
Using initrd.gz and linux from 
http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/,
 as suggested above, works.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-25 Thread Adam Conrad
When glibc was *uploaded* isn't meaningful here, it's when it was
released to -updates, which was the 20th, and is when people started
seeing this issue.  Unfortunately, the NSS ABI is easily perturbed and
seemingly unrelated changes can break it.

The "right" fix would be to attempt re-exec any long-running process
under d-i after updating libc6-udeb (or just refuse to update libc6 at
all in the installer environment), but that's not likely to happen in
xenial.

The easier fix on events like this is, indeed, use the netboot images
built with the newer glibc.  Expecting old netboot images to work
forever is a nice pipe dream, but has never actually been realistic in
practice.

TL;DR: Update to the latest xenial-updates netboot images, and the
problem will resolve itself.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-25 Thread m...@hp.com
I see this problem with the following initrd/kernel (I'm unable to trace
the provenance of these files to their upstream sources):

$ sha1sum linux initrd.gz 
6b11ddcba0f9a8a8dd1322e8c21ca185a7ac068e  linux
8bf4a099d764b8b1482c590fd9081610079c4378  initrd.gz


I can also confirm that switching to use initrd/kernel from 
http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/,
 as mwhudson suggests above, works for me.

Thanks for the pointer.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-23 Thread Laurent Dumont
What we're the chances that I needed a netboot of 16.04 today...

Looks like I am facing the same issue with Foreman + Proxmox + Netboot.
Is there a way to force the netboot from xenial-updates to test the fix?

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-23 Thread Michael Hudson-Doyle
I'm not an expert in this bit of the installer, but it seems to me that
the problem is that installation using older kernel/initrd is what is
failing. If you download the initrd/kernel from
http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-
amd64/current/images/netboot/ubuntu-installer/amd64/ today, it works.
Can someone who is experiencing the problem post the SHA1 of their
initrd/kernel?

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-23 Thread Jeremias Wong
Thanks @johan-zaxmy for proposed hotfix using kernel and initrd from
suite xenial-proposed

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Jeremias Wong
I’m also experiencing this issue.

Might be a bad daily build for 16.04.

Got this message with PXEBooting netinst Ubuntu 16.04
Loading libc6-udeb failed for unknown reasons. Aborting.

Looking at the logs, there’s a segfault in libc-2.23.so, right after
downloading
ubuntu/pool/main/g/glibc/libc6-udeb_2.23-0ubuntu11_amd64.udeb

MD5 (libc6-udeb_2.23-0ubuntu11_amd64.udeb) =
75d6702f728f2f9fc01c248455d1b8e9

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Michael Gregg
This bug is still confirmed and active.

Other bugs are coming in that are dupes of this:
https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1817358

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Jesse Rhoads
Yes, This problem _started_ on the 21st. I am seeing it when we attempt
to do netboot preseed installs of Xenial.  Bionic using the same
identical preseed is working fine.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Mykola Mogylenko
We faced with totally the same issue. We run PXE Installation on daily
basis as part of our CI/CD Process. It started to fail since Feb 21st.

** Attachment added: "Screenshot 2019-02-22 11.00.15.png"
   
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1816846/+attachment/5241002/+files/Screenshot%202019-02-22%2011.00.15.png

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Re: [Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Turbo Fredriksson
> we were able to just drop in the new kernel and initrd over top of the our 
> previous
> ones and our menu configs and preseeds came forward without any tweaks.

When you put it like that, that sounds fairly simple and non-intrusive. I’m also
considering the impact as a whole - any new machines I create will be ever so
slightly different than the others. Probably doesn’t matter, but at the moment
we’re not in a super rush.

I’ll give it till Monday morning to see if the correct fix will arrive, 
otherwise I’ll
replace the kernel and initrd image.

> We know it was working as recently as 2019-02-19 and first saw issues with it
> shortly before 22:00 UTC on 2019-02-20.

That’s very specific time frame. Should be easy enough for the Ubuntu devs
to try to pinpoint exactly what happened in the repo and from that trace the
fault.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Andrew Grasso
> My install image (with a modified boot meny, that loads the preseeding etc)
> is about a year old now, so not sure what the correct fix is. Updating our
> customised boot image would be a lot of work, so I’d prefer to have it
> fixed “correctly” (whatever it is).

I agree, and that was my initial reaction, but we were able to just drop
in the new kernel and initrd over top of the our previous ones and our
menu configs and preseeds came forward without any tweaks. Depends on if
you've built a custom initrd or modified the kernel, but might be worth
a try since I don't know if a backward compatible fix is on the way.
(linux and initrd.gz for netinstall available here:
http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-
amd64/current/images/netboot/ubuntu-installer/amd64/)

> We haven’t used the image in several months, so didn’t notice until yesterday.
> Just bad timing. But if it started happing just a few days ago (and you’ve 
> been
> running it successfully on the new libc6 package), then I agree it can’t be 
> that..

Our netinstall image was about 6 months old, and we use it almost every
day. We know it was working as recently as 2019-02-19 and first saw
issues with it shortly before 22:00 UTC on 2019-02-20, around the time
this bug report was opened.

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Re: [Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Turbo Fredriksson
> I'm not sure exactly what happened that started causing the segfaults,
> but it must have been a package update. As you note, libc6-udeb was last
> updated 2 weeks ago, so it doesn't make sense that it would only start
> causing issues this week. My suspicion is that something that depends on
> libc6-udeb is actually what was changed and is causing the fault.

My install image (with a modified boot meny, that loads the preseeding etc)
is about a year old now, so not sure what the correct fix is. Updating our
customised boot image would be a lot of work, so I’d prefer to have it
fixed “correctly” (whatever it is).

We haven’t used the image in several months, so didn’t notice until yesterday.
Just bad timing. But if it started happing just a few days ago (and you’ve been
running it successfully on the new libc6 package), then I agree it can’t be 
that..

> I'd be really interested in a technician description of what what went
> wrong here if anyone knows.

Yeah, me too!

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Andrew Grasso
@turbo-bayour

We had to upgrade our installer image to the one released 2019-02-21 at
13:49 UTC to get it working. We had downloaded fresh installers 15
minutes before that and were still seeing segfaults.

I'm not sure exactly what happened that started causing the segfaults,
but it must have been a package update. As you note, libc6-udeb was last
updated 2 weeks ago, so it doesn't make sense that it would only start
causing issues this week. My suspicion is that something that depends on
libc6-udeb is actually what was changed and is causing the fault. We
spent some time trying to track down the exact root cause, but in the
end just updating our installer image was the fastest way to get things
working again.

I'd be really interested in a technician description of what what went
wrong here if anyone knows.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Turbo Fredriksson
Version 2.23-0ubuntu11 is currently the latest version (xenial-updates).
Will there be a new, fixed upload? I'm guessing it's only the udeb that
was botched?

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-22 Thread Turbo Fredriksson
Mine's still not working. It downloads

http://archive.ubuntu.com/ubuntu//pool/main/g/glibc/libc6-udeb_2.23-0ubuntu11_amd64.udeb

which was uploaded *2019-02-05 20:38*. Not sure if this is still the
same problem, or if it's my (older) installer image that is the problem.

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-21 Thread Andrew Grasso
This appears to be fixed in the latest netboot installer published today
(2019-02-21 13:49 UTC).

http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-
amd64/current/images/netboot/

Our tests on installers before that were seeing the segfaults, but
everything seems to be working again using the latest installer.

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Title:
  segfault in libc-2.23.so netinstall installation pxe

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-21 Thread Mr Robot
Just tested Johan's workaround, and it works for us.

Thanks

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Title:
  segfault in libc-2.23.so netinstall installation pxe

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-21 Thread Vili Kosednar
netboot from xenial-proposed 20101020ubuntu451.28 works!
Thanks Johan!

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Title:
  segfault in libc-2.23.so netinstall installation pxe

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-21 Thread Vladislav Khlopeniuk
kernel and initrd.gz from xenial-proposed 20101020ubuntu451.28 works
fine. Thank you Johan Zaxmy for suggestion.

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Title:
  segfault in libc-2.23.so netinstall installation pxe

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[Bug 1816846] Re: segfault in libc-2.23.so netinstall installation pxe

2019-02-21 Thread Rodrigo Fernandez
I solved the problem with the solution proposed by johan-zaxmy.

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