gvfsd-mtp crashed with SIGABRT in g_mutex_clear()

Bug #1377110 reported by Gabriel Mazetto on 2014-10-03
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Fix Released
gvfs (Ubuntu)
Iain Lane

Bug Description

[ Description ]

Can crash when the plug is pulled on an MTP device when an operation is in progress.

[ Fix ]

Backport patch from upstream git.

[ Development fix ]

This change is in Vivid.

[ QA ]

I don't yet have reproducer steps. This is an upstream fix which is in Vivid, so I hope it can be accepted anyway.

It's https://errors.ubuntu.com/problem/e0bc04a0c1e91a77d2a47d8a9c0145e132cc47b3, so perhaps we can check for occurrences with the new version.

[ Original description ]

trying to mount a Android filesystem before unlocking the screen

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: gvfs-backends 1.20.2-1ubuntu2
Uname: Linux 3.16.1-031601-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Oct 3 03:37:23 2014
ExecutablePath: /usr/lib/gvfs/gvfsd-mtp
InstallationDate: Installed on 2013-01-21 (620 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
ProcCmdline: /usr/lib/gvfs/gvfsd-mtp --spawner :1.6 /org/gtk/gvfs/exec_spaw/18
 PATH=(custom, no user)
Signal: 6
SourcePackage: gvfs
 g_mutex_clear () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_value_unset () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gvfsd-mtp crashed with SIGABRT in g_mutex_clear()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

Gabriel Mazetto (brodock) wrote :

 g_mutex_clear (mutex=mutex@entry=0xf8d8f0) at /build/buildd/glib2.0-2.41.5/./glib/gthread-posix.c:1301
 g_vfs_backend_mtp_finalize (object=0xf8d8c0) at gvfsbackendmtp.c:378
 g_object_unref (_object=0xf8d8c0) at /build/buildd/glib2.0-2.41.5/./gobject/gobject.c:3170
 g_value_unset (value=value@entry=0x7fff2eb7d510) at /build/buildd/glib2.0-2.41.5/./gobject/gvalue.c:272
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff2eb7d690) at /build/buildd/glib2.0-2.41.5/./gobject/gsignal.c:3339

Changed in gvfs (Ubuntu):
importance: Undecided → Medium
tags: removed: need-amd64-retrace
Iain Lane (laney) on 2015-01-07
information type: Private → Public
Iain Lane (laney) on 2015-01-07
Changed in gvfs (Ubuntu):
status: New → Fix Released
Iain Lane (laney) wrote :

Hi Gabriel,

Do you have a series of steps to make this error happen?

I think I found a fix for it, and I've uploaded this to Utopic (pending review), but a way to make it happen to check it's really fixed would be appreciated.

Changed in gvfs (Ubuntu Utopic):
status: New → In Progress
assignee: nobody → Iain Lane (laney)
Changed in gvfs:
importance: Unknown → Medium
status: Unknown → Fix Released
Iain Lane (laney) on 2015-01-07
description: updated

Hello Gabriel, or anyone else affected,

Accepted gvfs into utopic-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/gvfs/1.20.2-1ubuntu3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in gvfs (Ubuntu Utopic):
status: In Progress → Fix Committed
tags: added: verification-needed
Sebastien Bacher (seb128) wrote :

Looking to e.u.c it seems the new version is stable, setting as verification-done

tags: added: verification-done
removed: verification-needed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gvfs - 1.20.2-1ubuntu3

gvfs (1.20.2-1ubuntu3) utopic; urgency=medium

  * 0001-ftp-Don-t-unlock-unlocked-mutex.patch,
    0001-mtp-do-not-crash-when-device-is-unplugged.patch: Backport patches
    from git to fix crashes due to misusing mutexes on newer versions of GLib
    (LP: #1361906, #1377110)
 -- Iain Lane <email address hidden> Wed, 07 Jan 2015 16:26:56 +0000

Changed in gvfs (Ubuntu Utopic):
status: Fix Committed → Fix Released
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