*** This bug is a security vulnerability ***
Public security bug reported:
Starting today, gnome-shell is crashing when you try to unlock the
screen. It then shows you your open windows (security?), and then it
restarts to the lock screen from where it will crash again if you move
mouse or press key.
ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.0-2ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu25
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Apr 8 20:09:33 2020
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges:
InstallationDate: Installed on 2018-03-14 (756 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180313)
ProcCmdline: /usr/bin/gnome-shell
RelatedPackageVersions: mutter-common 3.36.0-2ubuntu1
SegvAnalysis:
Segfault happened at: 0x7fc85dfc3aaf <st_theme_node_get_icon_style+159>:
repz cmpsb %es:(%rdi),%ds:(%rsi)
PC (0x7fc85dfc3aaf) ok
source "%es:(%rdi)" (0x7fc85dff48f9) ok
destination "%ds:(%rsi)" (0x00004d83) not located in a known VMA region
(needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: gnome-shell
StacktraceTop:
st_theme_node_get_icon_style () at /usr/lib/gnome-shell/libst-1.0.so
st_texture_cache_load_gicon () at /usr/lib/gnome-shell/libst-1.0.so
() at /usr/lib/gnome-shell/libst-1.0.so
() at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-shell crashed with SIGSEGV in st_theme_node_get_icon_style()
UpgradeStatus: Upgraded to focal on 2019-11-25 (135 days ago)
UserGroups: adm cdrom dip fax input kvm lpadmin lxd plugdev sambashare sbuild
sudo
separator:
** Affects: gnome-shell (Ubuntu)
Importance: Critical
Status: New
** Tags: amd64 apport-crash champagne focal third-party-packages
** Changed in: gnome-shell (Ubuntu)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1871684
Title:
gnome-shell crashed - endlessly in a loop from lock screen - with
SIGSEGV in st_theme_node_get_icon_style()
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