[Bug 1988398] Re: crash due to incomplete AVX check

[Simon Chopin]

Hi!

I'd be happy to sponsor this as an SRU to Jammy as well as a patch
against the current Kinetic release, but could you please follow the
instructions at https://wiki.ubuntu.com/StableReleaseUpdates beforehand,
in particular regarding the bug template?

Thanks :)

** Also affects: gnutls28 (Ubuntu Kinetic)
   Importance: Undecided
     Assignee: Simon Chopin (schopin)
       Status: New

** Also affects: gnutls28 (Ubuntu Jammy)
   Importance: Undecided
       Status: New

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Title:
  crash due to incomplete AVX check

Status in gnutls28 package in Ubuntu:
  New
Status in gnutls28 source package in Jammy:
  New
Status in gnutls28 source package in Kinetic:
  New

Bug description:
  Hello,

  gnutls 3.7.3-4ubuntu1.1 does not properly check for AVX support. On
  VMs that disable AVX / XSAVE but still set the AVX cpuid capability
  processes that use gnutls are crashing with an illegal instruction
  error.

  For details see:
  https://gitlab.com/gnutls/gnutls/-/issues/1282#note_991427169

  Attached you'll find the debdiff which adds 
  https://gitlab.com/gnutls/gnutls/-/commit/8ff391fa011e02c88b0d099061ca62e88ab68011

  I locally built the package and verified that the error on my VM is gone. Please consider including this patch into jammy. Upstream acknowledged that this patch is sufficient to fix the bug:
  https://gitlab.com/gnutls/gnutls/-/merge_requests/1631#note_1084762091

  Thanks,
  Gregor

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