[Bug 1559650] [NEW] gnome-shell crashed with SIGSEGV in ___vsnprintf_chk()

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Daniel van Vugt (vanvugt):

[Impact]

gnome-shell crashes a lot. Over 38000 times in bionic so far:
https://errors.ubuntu.com/problem/00455200cd9fb890dacfe09b92c7bda2f6ad3af7

[Test Case]

None known yet. Just keeping an eye on the above link for regressions.

[Regression Potential]

Low. The same fix has been released to newer distros for the past 2
years already.

[Other Info]

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: gnome-shell 3.18.4-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5
Uname: Linux 4.4.0-13-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Wed Mar 16 17:15:11 2016
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges:

InstallationDate: Installed on 2016-03-13 (6 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160311)
ProcCmdline: gnome-shell --mode=gdm --wayland --display-server
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7f1ff33f46ab <___vsnprintf_chk+107>:	movb   $0x0,(%r12)
 PC (0x7f1ff33f46ab) ok
 source "$0x0" ok
 destination "(%r12)" (0x00000000) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: gnome-shell
StacktraceTop:
 ___vsnprintf_chk (s=0x0, maxlen=<optimized out>, flags=1, slen=<optimized out>, format=0x7f1fe54ccae5 "%s%s", args=args at entry=0x7f1fce502da8) at vsnprintf_chk.c:55
 ___snprintf_chk (s=<optimized out>, maxlen=<optimized out>, flags=<optimized out>, slen=<optimized out>, format=<optimized out>) at snprintf_chk.c:34
 XauFileName () from /usr/lib/x86_64-linux-gnu/libXau.so.6
 XauGetBestAuthByAddr () from /usr/lib/x86_64-linux-gnu/libXau.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
Title: gnome-shell crashed with SIGSEGV in ___vsnprintf_chk()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

** Affects: gnome-shell
     Importance: Unknown
         Status: Unknown

** Affects: gnome-shell (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: libxau (Ubuntu)
     Importance: Medium
         Status: Fix Released

** Affects: libxau (Ubuntu Bionic)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: libxau (Ubuntu Eoan)
     Importance: Medium
         Status: Fix Released

** Affects: libxau (Ubuntu Focal)
     Importance: Medium
         Status: Fix Released


** Tags: amd64 apport-crash bionic xenial
-- 
gnome-shell crashed with SIGSEGV in ___vsnprintf_chk()
https://bugs.launchpad.net/bugs/1559650
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