snapd-login-service crashed with SIGSEGV in read_data()

[Craig Denman]

None.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: snapd-login-service 1.2-0ubuntu1.1
ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
Date: Sat Dec 24 13:14:09 2016
ExecutablePath: /usr/lib/snapd-glib/snapd-login-service
InstallationDate: Installed on 2015-07-19 (524 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcCmdline: /usr/lib/snapd-glib/snapd-login-service
ProcEnviron:

Signal: 11
SourcePackage: snapd-glib
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libsnapd-glib.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: snapd-login-service crashed with SIGSEGV in g_main_context_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 read_data (size=1024, cancellable=0x0, client=0x55dfe7f874d0) at snapd-client.c:1533
 read_from_snapd (cancellable=0x0, blocking=0, client=0x55dfe7f874d0) at snapd-client.c:1627
 read_cb (socket=<optimized out>, condition=<optimized out>, client=0x55dfe7f874d0) at snapd-client.c:1699
 socket_source_dispatch () from /tmp/apport_sandbox_1lgLGd/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () from /tmp/apport_sandbox_1lgLGd/lib/x86_64-linux-gnu/libglib-2.0.so.0

[Launchpad Janitor (janitor)]

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

[Robert Ancell (robert-ancell)]

This was fixed in 1.4:

commit 904bc196e3e3c8b5ca0a4da218c1da942b3255aa
Author: Robert Ancell <email address hidden>
Date: Tue Dec 6 15:16:22 2016 +1300

    Correctly remove read source when SnapdClient unreffed

diff --git a/snapd-glib/snapd-client.c b/snapd-glib/snapd-client.c
index 88a541d..7a0271b 100644
--- a/snapd-glib/snapd-client.c
+++ b/snapd-glib/snapd-client.c
@@ -3900,6 +3900,8 @@ snapd_client_finalize (GObject *object)
     g_clear_object (&priv->auth_data);
     g_list_free_full (priv->requests, g_object_unref);
     priv->requests = NULL;
+ if (priv->read_source != NULL)
+ g_source_destroy (priv->read_source);
     g_clear_pointer (&priv->read_source, g_source_unref);
     g_byte_array_unref (priv->buffer);
     priv->buffer = NULL;