touch-packages team mailing list archive

[Brian Murray <brian@xxxxxxxxxx>]

Hello dann, or anyone else affected,

Accepted gccgo-5 into vivid-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/gccgo-5/5.1~rc1-0ubuntu1.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: gccgo-5 (Ubuntu Vivid)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to gccgo-4.9 in Ubuntu.
https://bugs.launchpad.net/bugs/1472650

Title:
  [arm64] gccgo runtime crashes with CONFIG_ARM64_PGTABLE_LEVELS=4

Status in gcc:
  Unknown
Status in gcc-5 package in Ubuntu:
  Fix Released
Status in gccgo-4.9 package in Ubuntu:
  Invalid
Status in gccgo-5 package in Ubuntu:
  Invalid
Status in gccgo-4.9 source package in Trusty:
  In Progress
Status in gccgo-4.9 source package in Vivid:
  Invalid
Status in gccgo-5 source package in Vivid:
  Fix Committed
Status in gccgo-4.9 source package in Wily:
  Invalid

Bug description:
  [Impact]
  Various go-based packages crash on startup on arm64 when booted with a kernel where CONFIG_ARM64_PGTABLE_LEVELS=4. LXD, docker and juju are examples.

  Ubuntu does not ship with this config, so it is currently not
  impacted. However, we would like to enable this config to add new
  hardware support in 15.10. The 15.10 kernel will eventually be
  provided in trusty as an lts backport, at which point this will begin
  to break users.

  [Test Case]
  Boot an arm64 system with CONFIG_ARM64_PGTABLE_LEVELS=4 enabled in the kernel. Install docker.io and run "docker help". If it fails, you'll see "fatal error: runtime_lfstackpush" followed by a stack trace. If it succeeds, you'll get normal help output.

  [Regression Risk]
  The risk of regression is lessened by testing this release on existing Ubuntu kernels w/ 3 level page tables.

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