Fix sending events into rooms with non-integer power levels (#14073)

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David Robertson 2022-10-06 14:00:03 +01:00 committed by GitHub
parent 720b12c209
commit e9a0419c8d
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4 changed files with 86 additions and 1 deletions

1
changelog.d/14073.misc Normal file
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@ -0,0 +1 @@
Fix a bug introduced in Synapse 1.68.0 where messages could not be sent in rooms with non-integer `notifications` power level.

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@ -106,6 +106,9 @@ disallow_untyped_defs = False
[mypy-tests.handlers.test_user_directory]
disallow_untyped_defs = True
[mypy-tests.push.test_bulk_push_rule_evaluator]
disallow_untyped_defs = True
[mypy-tests.test_server]
disallow_untyped_defs = True

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@ -289,11 +289,18 @@ class BulkPushRuleEvaluator:
if relation.rel_type == RelationTypes.THREAD:
thread_id = relation.parent_id
# It's possible that old room versions have non-integer power levels (floats or
# strings). Workaround this by explicitly converting to int.
notification_levels = power_levels.get("notifications", {})
if not event.room_version.msc3667_int_only_power_levels:
for user_id, level in notification_levels.items():
notification_levels[user_id] = int(level)
evaluator = PushRuleEvaluator(
_flatten_dict(event),
room_member_count,
sender_power_level,
power_levels.get("notifications", {}),
notification_levels,
relations,
self._relations_match_enabled,
)

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from unittest.mock import patch
from synapse.api.room_versions import RoomVersions
from synapse.push.bulk_push_rule_evaluator import BulkPushRuleEvaluator
from synapse.rest import admin
from synapse.rest.client import login, register, room
from synapse.types import create_requester
from tests import unittest
class TestBulkPushRuleEvaluator(unittest.HomeserverTestCase):
servlets = [
admin.register_servlets_for_client_rest_resource,
room.register_servlets,
login.register_servlets,
register.register_servlets,
]
def test_action_for_event_by_user_handles_noninteger_power_levels(self) -> None:
"""We should convert floats and strings to integers before passing to Rust.
Reproduces #14060.
A lack of validation: the gift that keeps on giving.
"""
# Create a new user and room.
alice = self.register_user("alice", "pass")
token = self.login(alice, "pass")
room_id = self.helper.create_room_as(
alice, room_version=RoomVersions.V9.identifier, tok=token
)
# Alter the power levels in that room to include stringy and floaty levels.
# We need to suppress the validation logic or else it will reject these dodgy
# values. (Presumably this validation was not always present.)
event_creation_handler = self.hs.get_event_creation_handler()
requester = create_requester(alice)
with patch("synapse.events.validator.validate_canonicaljson"), patch(
"synapse.events.validator.jsonschema.validate"
):
self.helper.send_state(
room_id,
"m.room.power_levels",
{
"users": {alice: "100"}, # stringy
"notifications": {"room": 100.0}, # float
},
token,
state_key="",
)
# Create a new message event, and try to evaluate it under the dodgy
# power level event.
event, context = self.get_success(
event_creation_handler.create_event(
requester,
{
"type": "m.room.message",
"room_id": room_id,
"content": {
"msgtype": "m.text",
"body": "helo",
},
"sender": alice,
},
)
)
bulk_evaluator = BulkPushRuleEvaluator(self.hs)
# should not raise
self.get_success(bulk_evaluator.action_for_event_by_user(event, context))