Source: components/dlna_dmr/config_flow.py:477 AttributeError: 'NoneType' object has no attribute 'lower'

[628426]

The problem

I see the following error in the logs after restarts and semie regularly.

Logger: homeassistant
Source: components/dlna_dmr/config_flow.py:477
First occurred: 10:42:34 (1 occurrences)
Last logged: 10:42:34

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/discovery_flow.py", line 74, in async_process_pending_flows
await gather_with_concurrency(
File "/usr/src/homeassistant/homeassistant/util/async.py", line 170, in gather_with_concurrency
return await gather(
File "/usr/src/homeassistant/homeassistant/util/async_.py", line 168, in sem_task
return await task
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 203, in async_init
flow, result = await task
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 230, in _async_init
result = await self._async_handle_step(flow, flow.init_step, data, init_done)
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 325, in _async_handle_step
result: FlowResult = await getattr(flow, method)(user_input)
File "/usr/src/homeassistant/homeassistant/components/dlna_dmr/config_flow.py", line 213, in async_step_ssdp
if _is_ignored_device(discovery_info):
File "/usr/src/homeassistant/homeassistant/components/dlna_dmr/config_flow.py", line 477, in _is_ignored_device
manufacturer = discovery_info.upnp.get(ssdp.ATTR_UPNP_MANUFACTURER, "").lower()
AttributeError: 'NoneType' object has no attribute 'lower'

What version of Home Assistant Core has the issue?

core-2021.12.8

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Unable to tell

Link to integration documentation on our website

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Logger: homeassistant
Source: components/dlna_dmr/config_flow.py:477
First occurred: 10:42:34 (1 occurrences)
Last logged: 10:42:34

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/discovery_flow.py", line 74, in _async_process_pending_flows
    await gather_with_concurrency(
  File "/usr/src/homeassistant/homeassistant/util/async_.py", line 170, in gather_with_concurrency
    return await gather(
  File "/usr/src/homeassistant/homeassistant/util/async_.py", line 168, in sem_task
    return await task
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 203, in async_init
    flow, result = await task
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 230, in _async_init
    result = await self._async_handle_step(flow, flow.init_step, data, init_done)
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 325, in _async_handle_step
    result: FlowResult = await getattr(flow, method)(user_input)
  File "/usr/src/homeassistant/homeassistant/components/dlna_dmr/config_flow.py", line 213, in async_step_ssdp
    if _is_ignored_device(discovery_info):
  File "/usr/src/homeassistant/homeassistant/components/dlna_dmr/config_flow.py", line 477, in _is_ignored_device
    manufacturer = discovery_info.upnp.get(ssdp.ATTR_UPNP_MANUFACTURER, "").lower()
AttributeError: 'NoneType' object has no attribute 'lower'

Additional information

System Health

version	core-2021.12.8
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.9.7
os_name	Linux
os_version	5.10.88
arch	x86_64
timezone	Australia/Brisbane

Home Assistant Community Store

GitHub API	ok
Github API Calls Remaining	387
Installed Version	1.18.0
Stage	running
Available Repositories	992
Installed Repositories	1

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 7.1
update_channel	stable
supervisor_version	supervisor-2021.12.2
docker_version	20.10.9
disk_total	31.3 GB
disk_used	3.9 GB
healthy	true
supported	true
board	ova
supervisor_api	ok
version_api	ok
installed_addons	Check Home Assistant configuration (3.9.0), Studio Code Server (3.7.0), Terminal & SSH (9.3.0)

Lovelace

dashboards	2
resources	0
views	1
mode	storage

[probot-home-assistant]

dlna_dmr documentation
dlna_dmr source
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[probot-home-assistant]

Hey there @StevenLooman, @chishm, mind taking a look at this issue as it has been labeled with an integration (dlna_dmr) you are listed as a code owner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[chishm]

Thank you for the bug report. This looks like a DLNA device has something strange in its UPnP root description. I'll make _is_ignored_device more tolerant of such cases.