[Bug 1992206] Re: bash: non existent locale crashes bash

[Nick Rosbrook]

** Patch added: "bash_5.2-1ubuntu2.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1992206/+attachment/5622152/+files/bash_5.2-1ubuntu2.debdiff

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to bash in Ubuntu.
https://bugs.launchpad.net/bugs/1992206

Title:
  bash: non existent locale crashes bash

Status in bash package in Ubuntu:
  Triaged
Status in bash package in Debian:
  New

Bug description:
  Imported from Debian bug http://bugs.debian.org/1021109:

  Package: libc6
  Version: 2.35-1
  Severity: grave
  Justification: renders package unusable
  X-Debbugs-Cc: koster at debian.org

  Dear maintainer,

  After upgrading to libc6 2.35-1 (or 2.36-1 in experimental), nonexistent locale setting
  starts to crash the system.

  This is dangerous because a remote system might not always have the same locale installed.
  An auto update will soft-brick the system unless the sysadmin knows to set their LC_ALL=POSIX
  before attempting to ssh.

  Steps to reproduce:

  From a clean installed Debian sid, upgrade to libc6 2.35-1.
  Only install C locale and en_US.UTF-8.

  $ LC_ALL=ja_JP.UTF-8 bash
  bash: warning: setlocale: LC_ALL: cannot change locale (ja_JP.UTF-8)
  Segmentation fault (core dumped)

  $ LC_ALL=ja_JP.UTF-8 gdb bash

  Fatal signal: Segmentation fault
  ----- Backtrace -----
  0x55ed3e1e8dcf ???
  0x55ed3e2df312 ???
  0x55ed3e2df488 ???
  0x7f0b4a39ba9f ???
  0x7f0b4b412204 _rl_init_locale
  0x7f0b4b4122f1 _rl_init_eightbit
  0x7f0b4b3f10f2 rl_initialize
  ... snip ...

  Downgrade to 2.34-8 seems also don't fix the issue, probably some locale
  state was invalidated when upgrading.

  Thanks,
  Kan-Ru

  
  -- System Information:
  Debian Release: bookworm/sid
    APT prefers unstable
    APT policy: (500, 'unstable'), (1, 'experimental')
  Architecture: amd64 (x86_64)

  Kernel: Linux 5.19.0-2-amd64 (SMP w/8 CPU threads; PREEMPT)
  Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
  Shell: /bin/sh linked to /usr/bin/dash
  Init: systemd (via /run/systemd/system)
  LSM: AppArmor: enabled

  Versions of packages libc6 depends on:
  ii  libgcc-s1  12.2.0-3

  Versions of packages libc6 recommends:
  ii  libidn2-0  2.3.3-1+b1

  Versions of packages libc6 suggests:
  ii  debconf [debconf-2.0]  1.5.79
  pn  glibc-doc              <none>
  ii  libc-l10n              2.35-1
  pn  libnss-nis             <none>
  pn  libnss-nisplus         <none>
  ii  locales                2.35-1

  -- debconf information:
    glibc/kernel-too-old:
    glibc/restart-failed:
    glibc/disable-screensaver:
    glibc/upgrade: true
  * libraries/restart-without-asking: false
  * glibc/restart-services: cron
    glibc/kernel-not-supported:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1992206/+subscriptions