Thunar File Manager

thunar crashed with SIGSEGV in g_mutex_lock()

Bug #1832992 reported by David Kastrup on 2019-06-16

30

This bug affects 3 people

Affects		Status	Importance	Assigned to	Milestone
	Thunar File Manager	Confirmed	Medium	xfce-bugs #15211
	thunar (Ubuntu)	Fix Released	Medium	Unassigned

Bug Description

This is getting increasingly frequent and annoying. This time just trying to open a memory card was enough to trigger it.

ProblemType: Crash
DistroRelease: Ubuntu 19.10
Package: thunar 1.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-16.17-lowlatency 5.0.8
Uname: Linux 5.0.0-16-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu3
Architecture: amd64
CrashCounter: 1
Date: Sun Jun 16 15:34:50 2019
ExecutablePath: /usr/bin/thunar
InstallationDate: Installed on 2011-10-14 (2802 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
ProcCmdline: /usr/bin/Thunar --daemon
SegvAnalysis:
Segfault happened at: 0x7f02eb85baf5 <g_mutex_lock+5>: lock xadd %eax,(%rdi)
PC (0x7f02eb85baf5) ok
source "%eax" ok
destination "(%rdi)" (0x00000030) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: thunar
StacktraceTop:
g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
()
() at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
() at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
() at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
Title: thunar crashed with SIGSEGV in g_mutex_lock()
UpgradeStatus: Upgraded to eoan on 2019-05-12 (35 days ago)
UserGroups: adm admin audio cdrom dialout fax floppy lpadmin lxd plugdev pulse-access sambashare
separator:

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Revision history for this message

In Xfce Bugzilla #15211, LAZA (laza74) wrote on 2019-03-21:

#7

Created attachment 8349
journalctl crash report

Thunar is crashing permanently and reproducible on one drive:

https://forum.manjaro.org/t/thunar-crashes-how-to-sort-out-what-the-problem-is/79866

Revision history for this message

In Xfce Bugzilla #15211, Alexxcons-x (alexxcons-x) wrote on 2019-03-22:

#8

Same as for Bug #15212. Please provide a backtrace with debug symbols, and/or some more details on the use case .. what exactly you were doing in Thunar while it crashed ? Which view is used ? Which side-pane ?

Revision history for this message

In Xfce Bugzilla #15211, LAZA (laza74) wrote on 2019-03-22:

#9

I was searching for a file which contains a number at the beginning.

- detailled view
- tree
- tool style (?)

Revision history for this message

David Kastrup (dak) wrote on 2019-06-16:

#1

Dependencies.txt Edit (9.1 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (882 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (94.3 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1023 bytes, text/plain; charset="utf-8")
ProcEnviron.txt Edit (293 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (92.3 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (1.4 KiB, text/plain; charset="utf-8")
Registers.txt Edit (1.1 KiB, text/plain; charset="utf-8")
Stacktrace.txt Edit (1.7 KiB, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (6.0 KiB, text/plain; charset="utf-8")
XsessionErrors.txt Edit (11.9 MiB, text/plain; charset="utf-8")

information type:

Private → Public

Revision history for this message

Apport retracing service (apport) wrote on 2019-06-16:

#2

StacktraceTop:
g_mutex_lock (mutex=mutex@entry=0x30) at ../../../glib/gthread-posix.c:1354
thunar_thumbnailer_queue_async_reply (proxy=0x55c0633cd9e0, res=0x55c062d8e8c0, user_data=user_data@entry=0x7f02a80c15a0) at thunar-thumbnailer.c:344
g_task_return_now (task=0x55c062d8e8c0) at ../../../gio/gtask.c:1209
g_task_return (task=0x55c062d8e8c0, type=<optimized out>) at ../../../gio/gtask.c:1278
g_task_return (type=G_TASK_RETURN_SUCCESS, task=<optimized out>) at ../../../gio/gtask.c:1678

Revision history for this message

Apport retracing service (apport) wrote on 2019-06-16: Stacktrace.txt

#3

Stacktrace.txt Edit (4.5 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2019-06-16: StacktraceSource.txt

#4

StacktraceSource.txt Edit (4.3 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2019-06-16: ThreadStacktrace.txt

#5

ThreadStacktrace.txt Edit (16.1 KiB, text/plain)

Changed in thunar (Ubuntu):
importance:	Undecided → Medium
tags:	removed: need-amd64-retrace

Revision history for this message

In Xfce Bugzilla #15211, Theo Linkspfeifer (lastonestanding) wrote on 2020-03-08:

#10

Launchpad report with proper backtrace:
https://bugs.launchpad.net/ubuntu/+source/thunar/+bug/1832992

Revision history for this message

In Xfce Bugzilla #15211, Theo Linkspfeifer (lastonestanding) wrote on 2020-04-24:

#11

Created attachment 9788
test diff

With this change I get the crash when browsing a folder with image files.

Revision history for this message

In Xfce Bugzilla #15211, Andreldm-2 (andreldm-2) wrote on 2020-04-25:

#12

(In reply to Theo Linkspfeifer from comment #4)
> Created attachment 9788 [details]
> test diff
>
> With this change I get the crash when browsing a folder with image files.

It seems like thumbnailer gets free'd before thunar_thumbnailer_queue_async_reply is run.
However I don't think that's a valid reproducer and we can't just return if thumbnailer is NULL.
It would be much better if you (or OP) could find a reliable way to reproduce the crash.

Revision history for this message

In Xfce Bugzilla #15211, Theo Linkspfeifer (lastonestanding) wrote on 2020-04-26:

#13

I found a similar occurrence of this bug:

#0 0x00007f876295cce9 in g_mutex_lock (mutex=mutex@entry=0x40) at ../glib/gthread-posix.c:1354
        _g_boolean_var_ = <optimized out>
#1 0x00007f8761210ba5 in xfconf_cache_set_property_reply_handler (proxy=0x5639b6ad6bb0 [GDBusProxy], res=0x5639b6aa68f0, user_data=user_data@entry=0x7f8754017c10) at xfconf-cache.c:608
        cache = 0x0
        old_item = 0x7f8754017c10
        item = <optimized out>
        error = 0x0
        result = <optimized out>

Source: https://bugzilla.redhat.com/show_bug.cgi?id=1722851

Revision history for this message

In Xfce Bugzilla #15211, Theo Linkspfeifer (lastonestanding) wrote on 2020-04-26:

#14

Other variant of the Thunar crash:

#0 0x00007fe6d3f996ba in g_type_check_instance_cast (type_instance=0x1, iface_type=94349881536000) at ../gobject/gtype.c:4050
No locals.
#1 0x000055cf8acd997a in thunar_thumbnailer_queue_async_reply (proxy=0x55cf8b066950, res=0x55cf8b44e990, user_data=user_data@entry=0x55cf8b057e60) at thunar-thumbnailer.c:340
        job = 0x55cf8b057e60
        thumbnailer = <optimized out>
        error = 0x0
        handle = 32742

Source: https://bugzilla.redhat.com/show_bug.cgi?id=1748063

Revision history for this message

Launchpad Janitor (janitor) wrote on 2020-05-13:

#6

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in thunar (Ubuntu):
status:	New → Confirmed

Bug Watch Updater (bug-watch-updater) on 2020-05-13

Changed in thunar:
importance:	Unknown → Medium
status:	Unknown → Confirmed

Revision history for this message

Sean Davis (bluesabre) wrote on 2022-03-29:

#15

Reportedly fixed in thunar 1.8.15 and thunar 4.15.0.

Changed in thunar (Ubuntu):
status:	Confirmed → Fix Released

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