Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
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Cause: The "session" property was not in the VirtViewerDisplayVnc's contructor.
Consequence: virt_viewer_display_get_session() doesn't return anything useful without the property set.
Fix: Set the display's session property in the constructor.
Result: virt-viewer doesn't crash when connecting to a guest with VNC graphics.
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.
https://rhn.redhat.com/errata/RHBA-2015-0295.html
Description of problem: virt-viewer crash when connect a guest with vnc and qxl Version-Release number of selected component (if applicable): virt-viewer-0.6.0-8.el7.x86_64 libvirt-1.2.8-3.el7.x86_64 qemu-kvm-rhev-2.1.2-3.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.prepare a guest with vnc graphics and qxl video # virsh dumpxml test3 <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'> <listen type='address' address='127.0.0.1'/> </graphics> ..... <video> <model type='qxl' ram='65536' vram='65536' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> 2.# virsh start test3 Domain test3 started 3.# virt-viewer test3 (virt-viewer:15830): virt-viewer-CRITICAL **: virt_viewer_session_get_app: assertion 'VIRT_VIEWER_IS_SESSION(self)' failed Segmentation fault (core dumped) Actual results: virt-viewer crashed Expected results: no crash Additional info: back trace: Thread 2 (Thread 0x7fffdb6cf700 (LWP 14796)): #0 0x00007ffff3677a8d in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007ffff3bb2c94 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fffd40010c0, timeout=-1, context=0x6da910) at gmain.c:4025 #2 g_main_context_iterate (context=0x6da910, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3726 #3 0x00007ffff3bb2fda in g_main_loop_run (loop=0x6cfc80) at gmain.c:3925 #4 0x00007ffff4d6d276 in gdbus_shared_thread_func (user_data=0x6da8e0) at gdbusprivate.c:273 #5 0x00007ffff3bd86d5 in g_thread_proxy (data=0x67e4a0) at gthread.c:764 #6 0x00007ffff3954df3 in start_thread (arg=0x7fffdb6cf700) at pthread_create.c:308 #7 0x00007ffff368205d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 Thread 1 (Thread 0x7ffff7f9da80 (LWP 14783)): #0 virt_viewer_app_get_nth_window (self=self@entry=0x0, nth=0) at virt-viewer-app.c:781 #1 0x0000000000413595 in display_show_hint ( display=0x86c650 [VirtViewerDisplayVnc], pspec=<optimized out>, ---Type <return> to continue, or q <return> to quit--- user_data=<optimized out>) at virt-viewer-app.c:911 #2 0x00007ffff3eabfd8 in g_closure_invoke (closure=0x83f4a0, return_value=return_value@entry=0x0, n_param_values=2, param_values=param_values@entry=0x7fffffffcfb0, invocation_hint=invocation_hint@entry=0x7fffffffcf50) at gclosure.c:768 #3 0x00007ffff3ebe0ad in signal_emit_unlocked_R (node=node@entry=0x667a60, detail=detail@entry=1577, instance=instance@entry=0x86c650, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffffffcfb0) at gsignal.c:3551 #4 0x00007ffff3ec5e32 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffffffd140) at gsignal.c:3307 #5 0x00007ffff3ec60ef in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3363 #6 0x00007ffff3eb0675 in g_object_dispatch_properties_changed ( object=0x86c650 [VirtViewerDisplayVnc], n_pspecs=0, pspecs=0x6) at gobject.c:1053 #7 0x00007ffff3eb2d59 in g_object_notify_by_spec_internal ( pspec=<optimized out>, object=0x86c650 [VirtViewerDisplayVnc]) at gobject.c:1147 ---Type <return> to continue, or q <return> to quit--- #8 g_object_notify (object=0x86c650 [VirtViewerDisplayVnc], property_name=property_name@entry=0x427efe "show-hint") at gobject.c:1194 #9 0x0000000000411e5e in virt_viewer_app_display_added ( session=<optimized out>, display=0x86c650 [VirtViewerDisplayVnc], self=0x856140 [VirtViewer]) at virt-viewer-app.c:950 #10 0x00007ffff3eaf2db in g_cclosure_marshal_VOID__OBJECTv (closure=0x884890, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=0x0, n_params=<optimized out>, param_types=0x8254e0) at gmarshal.c:1312 #11 0x00007ffff3eac207 in _g_closure_invoke_va ( closure=closure@entry=0x884890, return_value=return_value@entry=0x0, instance=instance@entry=0x7dfb00, args=args@entry=0x7fffffffd548, n_params=1, param_types=0x8254e0) at gclosure.c:831 #12 0x00007ffff3ec5487 in g_signal_emit_valist ( instance=instance@entry=0x7dfb00, signal_id=signal_id@entry=213, detail=detail@entry=0, var_args=var_args@entry=0x7fffffffd548) at gsignal.c:3215 #13 0x00007ffff3ec6638 in g_signal_emit_by_name ( instance=instance@entry=0x7dfb00, detailed_signal=detailed_signal@entry=0x4281c2 "session-display-added") at gsignal.c:3403 ---Type <return> to continue, or q <return> to quit--- #14 0x00000000004185ce in virt_viewer_session_add_display ( session=0x7dfb00 [VirtViewerSessionVnc], display=0x86c650 [VirtViewerDisplayVnc]) at virt-viewer-session.c:444 #15 0x00007ffff3eac207 in _g_closure_invoke_va ( closure=closure@entry=0x87a090, return_value=return_value@entry=0x0, instance=instance@entry=0x8751d0, args=args@entry=0x7fffffffd870, n_params=0, param_types=0x0) at gclosure.c:831 #16 0x00007ffff3ec5487 in g_signal_emit_valist (instance=0x8751d0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffd870) at gsignal.c:3215 #17 0x00007ffff3ec60ef in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3363 #18 0x00007ffff74ca5b5 in on_connected () from /lib64/libgtk-vnc-2.0.so.0 #19 0x00007ffff3eac207 in _g_closure_invoke_va ( closure=closure@entry=0x879f60, return_value=return_value@entry=0x0, instance=instance@entry=0x87f2b0, args=args@entry=0x7fffffffdb30, n_params=0, param_types=0x0) at gclosure.c:831 #20 0x00007ffff3ec5487 in g_signal_emit_valist (instance=0x87f2b0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffdb30) at gsignal.c:3215 #21 0x00007ffff3ec60ef in g_signal_emit (instance=<optimized out>, ---Type <return> to continue, or q <return> to quit--- signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3363 #22 0x00007ffff72ad735 in do_vnc_connection_emit_main_context () from /lib64/libgvnc-1.0.so.0 #23 0x00007ffff3bb29ba in g_main_dispatch (context=0x68bab0) at gmain.c:3061 #24 g_main_context_dispatch (context=context@entry=0x68bab0) at gmain.c:3660 #25 0x00007ffff3bb2d08 in g_main_context_iterate (context=0x68bab0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3731 #26 0x00007ffff3bb2fda in g_main_loop_run (loop=0x8d3e40) at gmain.c:3925 #27 0x00007ffff595e12d in gtk_main () from /lib64/libgtk-3.so.0 #28 0x000000000040fc1a in main (argc=1, argv=0x7fffffffe048) at virt-viewer-main.c:116