[Bug 2081604] Re: pk-debconf-helper crashed with SIGSEGV in pk_client_helper_copy_stdout_cb()

[Sebastien Bacher]

@Zixing, thank you for the patch, could you give some explanation about
your understanding of the issue and how is the patch addressing the
problem?

Any chance you could also submit it upstream for review on
https://github.com/PackageKit/PackageKit/pulls ?

The package is currently in sync with Debian and it would be nice to
keep it this way, especially that a bug in the debconf handling probably
would also happen there

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https://bugs.launchpad.net/bugs/2081604

Title:
  pk-debconf-helper crashed with SIGSEGV in
  pk_client_helper_copy_stdout_cb()

Status in packagekit package in Ubuntu:
  New

Bug description:
  random crash after installing Ubuntu 24.10 Beta

  ProblemType: Crash
  DistroRelease: Ubuntu 24.10
  Package: packagekit 1.3.0-1
  ProcVersionSignature: Ubuntu 6.11.0-7.7-generic 6.11.0-rc7
  Uname: Linux 6.11.0-7-generic x86_64
  ApportVersion: 2.30.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 21 21:56:45 2024
  ExecutablePath: /usr/libexec/pk-debconf-helper
  InstallationDate: Installed on 2024-09-21 (0 days ago)
  InstallationMedia: Ubuntu 24.10 "Oracular Oriole" - Beta amd64 (20240919)
  JournalErrors:
   sept. 21 21:56:41 hostname xdg-desktop-por[3252]: Could not find WebExtensions backend: Could not find native messaging host
   sept. 21 21:56:46 hostname systemd[2292]: pk-debconf-helper.service: Main process exited, code=dumped, status=11/SEGV
   sept. 21 21:56:46 hostname systemd[2292]: pk-debconf-helper.service: Failed with result 'core-dump'.
  ProcCmdline: /usr/libexec/pk-debconf-helper
  ProcEnviron:
   LANG=fr_FR.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  SegvAnalysis:
   Segfault happened at: 0x77e2f8a5b318:	mov    0x8(%rax),%rcx
   PC (0x77e2f8a5b318) ok
   source "0x8(%rax)" (0x00000008) not located in a known VMA region (needed readable region)!
   destination "%rcx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SignalName: SIGSEGV
  SourcePackage: packagekit
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libpackagekit-glib2.so.18
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? ()
  Title: pk-debconf-helper crashed with SIGSEGV in g_main_loop_run()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users
  modified.conffile..etc.dbus-1.system.d.org.freedesktop.PackageKit.conf: [deleted]
  separator:

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