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Bug 1354560 - virt-viewer crashes gnome-shell
Summary: virt-viewer crashes gnome-shell
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: gnome-shell
Version: 7.3
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Florian Müllner
QA Contact: Desktop QE
Depends On:
TreeView+ depends on / blocked
Reported: 2016-07-11 14:56 UTC by Vladimir Benes
Modified: 2016-11-04 01:44 UTC (History)
4 users (show)

Fixed In Version: gnome-shell-3.14.4-51.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2016-11-04 01:44:58 UTC
Target Upstream Version:

Attachments (Terms of Use)
gnome-shlle gdb out (deleted)
2016-07-12 14:31 UTC, Tomas Pelka
no flags Details
gnome-shell gdb out (deleted)
2016-07-12 15:00 UTC, Tomas Pelka
no flags Details

System ID Priority Status Summary Last Updated
GNOME Bugzilla 674799 None None None 2016-07-12 15:16:15 UTC
Red Hat Product Errata RHBA-2016:2258 normal SHIPPED_LIVE gnome-shell, gnome-shell-extensions, and gtk3 bug fix and enhancement update 2016-11-03 13:32:13 UTC

Description Vladimir Benes 2016-07-11 14:56:31 UTC
Description of problem:
While starting virt-viewer gnome-shell goes down into oops screen. 

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.start virt-viewer

Actual results:
GS crash

Expected results:
no crash

Additional info:
no abrt crash, no backtrace in gdb, just SIGABRT caught. Reproduced on two independent boxes

Comment 2 Tomas Pelka 2016-07-11 15:21:06 UTC
Most probably related to

Comment 3 Tomas Pelka 2016-07-12 14:27:47 UTC
I can trigger that also by libreoffice and cssh

Comment 4 Tomas Pelka 2016-07-12 14:31:04 UTC
Created attachment 1178915 [details]
gnome-shlle gdb out

Program received signal SIGABRT, Aborted.
0x00007f5686ada1d7 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56	  return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);

Comment 5 Tomas Pelka 2016-07-12 15:00:39 UTC
Created attachment 1178937 [details]
gnome-shell gdb out

Comment 6 Tomas Pelka 2016-07-12 15:16:15 UTC
halfline proposed fix from mentioned bug

Comment 7 Ray Strode [halfline] 2016-07-12 16:58:49 UTC
Just to clarify a bit, the issue is caused by this commit:

Author: Florian Müllner <>
Date:   Wed Jul 6 19:56:47 2016 +0200

    app: Add a construct-only app-info property

    This will allow us to create a ShellApp from JS code, for instance
    for .desktop files that aren't known to the AppSystem.

So that means the app-info property will get set unconditionally at instance creation time, even if app-info isn't explicitly set in the property list.

That commit changes _shell_app_new () to set "app-info" explicitly, but _shell_app_new_for_window() doesn't set "app-info" explicitly so the property will get set to NULL at creation time.  

If i'm reading the code right, this will cause two things to happen:

1) app->info getting set to g_object_ref (NULL)
2) shell_app_get_name (app) will get called with app->info NULL and window_backed_app_get_window() will assert because app->running_state fails.  

The patch in bug 674799 should address the second problem.  The first problem probably causes noise in the log so it should probably get fixed too.

Comment 9 Vladimir Benes 2016-07-12 20:57:39 UTC
It works well. virt-viewer works, LO too. No crashes anymore.

Comment 12 errata-xmlrpc 2016-11-04 01:44:58 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

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