[Bug 1903814] Re: [binutils] Prevent GOT access rewrite for certain symbols

[Dimitri John Ledkov]

"The patch applies fine to 2.26 and 2.30 (except for tests, but we don't
need them)."

but we do. normally whenever doing toolchain fixes and updates,
unittests are expected to be backported as all of them are exercised
before allowing to release the update.

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Title:
  [binutils] Prevent GOT access rewrite for certain symbols

Status in Ubuntu on IBM z Systems:
  Triaged
Status in binutils package in Ubuntu:
  Fix Released
Status in binutils source package in Bionic:
  New

Bug description:
  Please backport the following bugfix into Ubuntu LTS:
  https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=e6213e09ed0e

  Some relevant historic links:
  Debian bugreport: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961736
  glibc bugreport: https://sourceware.org/bugzilla/show_bug.cgi?id=18960

  In s390 kernel context, this bug manifests itself as random errors and
  infinite loops, so it's fairly severe.

  These are the current versions of binutils:
  Package binutils

      xenial (16.04LTS) (devel): GNU assembler, linker and binary utilities
      2.26.1-1ubuntu1~16.04.8 [security]: amd64 i386
      2.26-8ubuntu2 [ports]: arm64 armhf powerpc ppc64el s390x
      xenial-updates (devel): GNU assembler, linker and binary utilities
      2.26.1-1ubuntu1~16.04.8: amd64 arm64 armhf i386 powerpc ppc64el s390x
      bionic (18.04LTS) (devel): GNU assembler, linker and binary utilities
      2.30-21ubuntu1~18.04.4 [security]: amd64 i386
      2.30-15ubuntu1 [ports]: arm64 armhf ppc64el s390x
      bionic-updates (devel): GNU assembler, linker and binary utilities
      2.30-21ubuntu1~18.04.4: amd64 arm64 armhf i386 ppc64el s390x
      focal (20.04LTS) (devel): GNU assembler, linker and binary utilities
      2.34-6ubuntu1: amd64 arm64 armhf i386 ppc64el s390x
      groovy (devel): GNU assembler, linker and binary utilities
      2.35.1-1ubuntu1: amd64 arm64 armhf i386 ppc64el s390x

  The patch applies fine to 2.26 and 2.30 (except for tests, but we
  don't need them). We don't need it on 2.32+.

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