dx-packages team mailing list archive

[Iain Lane <iain@xxxxxxxxxxxxxxxxxxx>]

Okay, I've uploaded a fix to groovy and the review queue for 20.04.

** Description changed:

+ [ Description ]
+ 
+ When accountsservice's daemon is restarted - particularly when there is
+ a user configured for auto login - it can cause code using its library
+ to crash. This is bad because gnome-shell is one of those users which
+ crashes.
+ 
+ [ QA ]
+ 
+ Configure a user for automatic login in gnome-shell.
+ 
+ Restart accounts-daemon.service (sudo systemctl restart accounts-
+ daemon.service) a few times, leaving several seconds between each
+ attempt.
+ 
+ See that it crashes if you don't have this SRU, and doesn't if you do
+ have it.
+ 
+ ---
+ 
+ Test that fast user switching still works properly.
+ 
+ ---
+ 
+ Take a look at the error reports listed below and hopefully see them not
+ occurring (barring the usual noise) with the SRU.
+ 
+ [ Regression potential ]
+ 
+ We think this is safe - it tells clients that the daemon is away when it
+ quits, and is back when it comes back. They should get appropriate
+ signals to indicate this. Nevertheless, these signals are sent when they
+ weren't before now, so that could cause problems. Watch out for errors
+ creeping up with this SRU.
+ 
+ We wondered upstream whether some more protections might be needed. I'm
+ thinking that those should be *additional* safety rails around this fix,
+ but it could actually be that more is needed and this fix isn't
+ complete.
+ 
+ [ Original report ]
+ 
  https://errors.ubuntu.com/problem/597be858df957473f357a9249b002b0e39f42781
  https://errors.ubuntu.com/problem/3a817938d76d231fdfc8f698392fbf5e3724084f
  https://errors.ubuntu.com/problem/3945cd9cdcec914cab9a3220d05e9696933336c7
  
  ProblemType: Crash
  DistroRelease: Ubuntu 19.10
  Package: gnome-shell 3.34.0-1ubuntu1
  ProcVersionSignature: Ubuntu 5.3.0-10.11-generic 5.3.0-rc8
  Uname: Linux 5.3.0-10-generic x86_64
  ApportVersion: 2.20.11-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 14 10:29:16 2019
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2019-05-24 (112 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190523)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   LANG=nb_NO.UTF-8
   LANGUAGE=nb_NO:nb:no_NO:no:nn_NO:nn:en
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  RelatedPackageVersions: mutter-common 3.34.0-2ubuntu1
  Signal: 11
  SourcePackage: gnome-shell
  StacktraceTop:
   g_str_hash () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_hash_table_lookup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libaccountsservice.so.0
   g_closure_invoke () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: gnome-shell crashed with SIGSEGV in g_str_hash()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  separator:

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You received this bug notification because you are a member of DX
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Matching subscriptions: dx-packages
https://bugs.launchpad.net/bugs/1843982

Title:
  Various programs crashed with SIGSEGV in g_str_hash() from
  g_hash_table_lookup() from update_user()

Status in accountsservice:
  New
Status in accountsservice package in Ubuntu:
  Triaged
Status in accountsservice source package in Focal:
  Triaged
Status in accountsservice package in Debian:
  Confirmed

Bug description:
  [ Description ]

  When accountsservice's daemon is restarted - particularly when there
  is a user configured for auto login - it can cause code using its
  library to crash. This is bad because gnome-shell is one of those
  users which crashes.

  [ QA ]

  Configure a user for automatic login in gnome-shell.

  Restart accounts-daemon.service (sudo systemctl restart accounts-
  daemon.service) a few times, leaving several seconds between each
  attempt.

  See that it crashes if you don't have this SRU, and doesn't if you do
  have it.

  ---

  Test that fast user switching still works properly.

  ---

  Take a look at the error reports listed below and hopefully see them
  not occurring (barring the usual noise) with the SRU.

  [ Regression potential ]

  We think this is safe - it tells clients that the daemon is away when
  it quits, and is back when it comes back. They should get appropriate
  signals to indicate this. Nevertheless, these signals are sent when
  they weren't before now, so that could cause problems. Watch out for
  errors creeping up with this SRU.

  We wondered upstream whether some more protections might be needed.
  I'm thinking that those should be *additional* safety rails around
  this fix, but it could actually be that more is needed and this fix
  isn't complete.

  [ Original report ]

  https://errors.ubuntu.com/problem/597be858df957473f357a9249b002b0e39f42781
  https://errors.ubuntu.com/problem/3a817938d76d231fdfc8f698392fbf5e3724084f
  https://errors.ubuntu.com/problem/3945cd9cdcec914cab9a3220d05e9696933336c7

  ProblemType: Crash
  DistroRelease: Ubuntu 19.10
  Package: gnome-shell 3.34.0-1ubuntu1
  ProcVersionSignature: Ubuntu 5.3.0-10.11-generic 5.3.0-rc8
  Uname: Linux 5.3.0-10-generic x86_64
  ApportVersion: 2.20.11-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 14 10:29:16 2019
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2019-05-24 (112 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190523)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   LANG=nb_NO.UTF-8
   LANGUAGE=nb_NO:nb:no_NO:no:nn_NO:nn:en
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  RelatedPackageVersions: mutter-common 3.34.0-2ubuntu1
  Signal: 11
  SourcePackage: gnome-shell
  StacktraceTop:
   g_str_hash () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_hash_table_lookup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libaccountsservice.so.0
   g_closure_invoke () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: gnome-shell crashed with SIGSEGV in g_str_hash()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  separator:

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