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

[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.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to glibc in Ubuntu.
https://bugs.launchpad.net/bugs/1816846

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

Status in glibc package in Ubuntu:
  Confirmed

Bug description:
  I have implemented a PXE server in Virtualbox 6.0.4 to perform
  automatic installations of different versions of Linux (particularly
  Ubuntu).

  Until a few hours ago I could perform the automatic installation of
  Ubuntu Server 16.04.5 on a VM, but after updating libc6-udeb
  (2.23-0ubuntu11), I get the following error:

  kernel: [  186.927962] sh[8177]: segfault at 18 ip 00007fc21ff438df sp
  00007ffe594a5e80 error 4 in libc-2.23.so[7fc21ff23000+1c0000]

  I don't know how to fetch the installation log, so I attach a
  screenshot.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1816846/+subscriptions