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device: avoid crash setting VPN config during unrealize

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During nm_device_unrealize(), we first clear the device's ifindex. Then
we call _set_state_full(NM_DEVICE_STATE_UNMANAGED).

NMVpnConnection are subclasses of NMActiveConnection, it is that way
connected to NM_DEVICE_STATE_CHANGED signal. And this leads to a call
to _set_vpn_state(), which then calls nm_device_replace_vpn6_config()
to unregister the config. Thereby an assertion fails because the
ifindex no longer matches.

Fix that by relaxing the assertion. Also, don't apply the IP
configuration in unexpected device states.

https://bugzilla.redhat.com/show_bug.cgi?id=1912423

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/927
This commit is contained in:
Thomas Haller 2021-07-13 14:41:25 +02:00
parent fa786e1f46
commit 63a248ecb2
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GPG key ID: 29C2366E4DFC5728
1 changed files with 11 additions and 5 deletions
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16
src/core/devices/nm-device.c
View file

@ -13800,18 +13800,24 @@ void
nm_device_replace_vpn6_config(NMDevice *self, NMIP6Config *old, NMIP6Config *config)
{
NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE(self);
NMDeviceState state;
nm_assert(!old || NM_IS_IP6_CONFIG(old));
nm_assert(!old || nm_ip6_config_get_ifindex(old) > 0);
nm_assert(!old || nm_device_get_ip_ifindex(self) == 0
|| nm_device_get_ip_ifindex(self) == nm_ip6_config_get_ifindex(old));
nm_assert(!config || NM_IS_IP6_CONFIG(config));
nm_assert(!old || nm_ip6_config_get_ifindex(old) == nm_device_get_ip_ifindex(self));
nm_assert(!config || nm_ip6_config_get_ifindex(config) == nm_device_get_ip_ifindex(self));
nm_assert(!config || nm_ip6_config_get_ifindex(config) > 0);
nm_assert(!config || nm_device_get_ip_ifindex(self) == nm_ip6_config_get_ifindex(config));
if (!_replace_vpn_config_in_list(&priv->vpn_configs_6, (GObject *) old, (GObject *) config))
return;
/* NULL to use existing configs */
if (!ip_config_merge_and_apply(self, AF_INET6, TRUE))
_LOGW(LOGD_IP6, "failed to set VPN routes for device");
state = nm_device_get_state(self);
if (state >= NM_DEVICE_STATE_IP_CONFIG && state <= NM_DEVICE_STATE_ACTIVATED) {
if (!ip_config_merge_and_apply(self, AF_INET6, TRUE))
_LOGW(LOGD_IP6, "failed to set VPN routes for device");
}
}
NMIP6Config *