Created attachment 302005 [details] [review]
[PATCH] device: make sure NMDevice doesn't vanish halfway through applying configuration

It could be that the device was removed and the default route manager holds the
last reference:

  Breakpoint 1, dispose (object=0x90e710 [NMDeviceTun]) at devices/nm-device.c:8588
  8588            NMDevice *self = NM_DEVICE (object);
  (gdb) bt
  #0  0x000000000045d24e in dispose (object=0x90e710 [NMDeviceTun]) at devices/nm-device.c:8588
  #1  0x00007ffff4d29b7c in g_object_unref (_object=0x90e710) at gobject.c:3133
  #2  0x00000000004b0a61 in _entry_at_idx_remove (entry=<optimized out>) at nm-default-route-manager.c:192
  #3  0x00000000004b0a61 in _entry_at_idx_remove (vtable=<optimized out>, self=<optimized out>, entry_idx=<optimized out>) at nm-default-route-manager.c:638
  #4  0x00000000004adb51 in _ipx_update_default_route (vtable=0x7b1850 <vtable_ip6>, self=0x7da610 [NMDefaultRouteManager], source=<optimized out>) at nm-default-route-manager.c:814
  #5  0x0000000000459ccb in nm_device_set_ip6_config (self=0x90e710 [NMDeviceTun], new_config=<optimized out>, commit=<optimized out>, reason=<optimized out>) at devices/nm-device.c:6213
  #6  0x0000000000450c92 in ip6_config_merge_and_apply (self=0x90e710 [NMDeviceTun], commit=0, out_reason=0x0) at devices/nm-device.c:3670
  #7  0x0000000000452d06 in update_ip_config (self=0x90e710 [NMDeviceTun], initial=<optimized out>) at devices/nm-device.c:6915
  #8  0x000000000046253e in queued_ip_config_change (user_data=<optimized out>) at devices/nm-device.c:6945
  #9  0x00007ffff4a257fb in g_main_context_dispatch (context=0x7ca3e0) at gmain.c:3111
  #10 0x00007ffff4a257fb in g_main_context_dispatch (context=context@entry=0x7ca3e0) at gmain.c:3710
  #11 0x00007ffff4a25b98 in g_main_context_iterate (context=0x7ca3e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3781
  #12 0x00007ffff4a25ec2 in g_main_loop_run (loop=0x7ca4a0) at gmain.c:3975
  #13 0x0000000000444bbe in main (argc=<optimized out>, argv=<optimized out>) at main.c:486
  (gdb)

  Program received signal SIGTRAP, Trace/breakpoint trap.
  g_logv (log_domain=0x7ffff4d4f164 "GLib-GObject", log_level=G_LOG_LEVEL_WARNING, format=<optimized out>, args=args@entry=0x7fffffffd5b0) at gmessages.c:1046
  1046              g_private_set (&g_log_depth, GUINT_TO_POINTER (depth));
  (gdb) bt
  #0  0x00007ffff4a2c970 in g_logv (log_domain=0x7ffff4d4f164 "GLib-GObject", log_level=G_LOG_LEVEL_WARNING, format=<optimized out>, args=args@entry=0x7fffffffd5b0) at gmessages.c:1046
  #1  0x00007ffff4a2cbaf in g_log (log_domain=log_domain@entry=0x7ffff4d4f164 "GLib-GObject", log_level=log_level@entry=G_LOG_LEVEL_WARNING, format=format@entry=0x7ffff4d563b0 "invalid unclassed pointer in cast to '%s'") at gmessages.c:1079
  #2  0x00007ffff4d481f9 in g_type_check_instance_cast (type_instance=0x90e710, iface_type=<optimized out>) at gtype.c:4030
  #3  0x0000000000459ceb in nm_device_set_ip6_config (self=0x90e710, new_config=<optimized out>, commit=<optimized out>, reason=0x0) at devices/nm-device.c:6217
  #4  0x0000000000450c92 in ip6_config_merge_and_apply (self=0x90e710, commit=0, out_reason=0x0) at devices/nm-device.c:3670
  #5  0x0000000000452d06 in update_ip_config (self=0x90e710, initial=<optimized out>) at devices/nm-device.c:6915
  #6  0x000000000046253e in queued_ip_config_change (user_data=<optimized out>) at devices/nm-device.c:6945
  #7  0x00007ffff4a257fb in g_main_context_dispatch (context=0x7ca3e0) at gmain.c:3111
  #8  0x00007ffff4a257fb in g_main_context_dispatch (context=context@entry=0x7ca3e0) at gmain.c:3710
  #9  0x00007ffff4a25b98 in g_main_context_iterate (context=0x7ca3e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3781
  #10 0x00007ffff4a25ec2 in g_main_loop_run (loop=0x7ca4a0) at gmain.c:3975
  #11 0x0000000000444bbe in main (argc=<optimized out>, argv=<optimized out>) at main.c:486
  (gdb)
---
 src/devices/nm-device.c | 3 +++
 1 file changed, 3 insertions(+)