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Sean Quah 772e8c2385
Fix stack overflow in _PerHostRatelimiter due to synchronous requests (#14812) 
When there are many synchronous requests waiting on a
`_PerHostRatelimiter`, each request will be started recursively just
after the previous request has completed. Under the right conditions,
this leads to stack exhaustion.

A common way for requests to become synchronous is when the remote
client disconnects early, because the homeserver is overloaded and slow
to respond.

Avoid stack exhaustion under these conditions by deferring subsequent
requests until the next reactor tick.

Fixes #14480.

Signed-off-by: Sean Quah <seanq@matrix.org>
2023-01-13 00:16:21 +00:00
..
api Do not reject /sync requests with unrecognised filter fields (#14369) 2022-11-07 13:49:31 +00:00
app Use servlets for /key/ endpoints. (#14229) 2022-10-20 11:32:47 -04:00
appservice Use device_one_time_keys_count to match MSC3202 (#14565) 2022-11-28 16:17:29 +00:00
config Add missing type hints to tests.config. (#14681) 2022-12-16 08:53:28 -05:00
crypto Add missing type hints to tests. (#14687) 2022-12-28 08:29:35 -05:00
events Allow selecting "prejoin" events by state keys (#14642) 2022-12-13 00:54:46 +00:00
federation Modernize unit tests configuration settings for workers. (#14568) 2022-12-01 07:38:27 -05:00
handlers Support RFC7636 PKCE in the OAuth 2.0 flow. (#14750) 2023-01-04 14:58:08 -05:00
http Remove redundant types from comments. (#14412) 2022-11-16 15:25:24 +00:00
logging Implementation of HTTP 307 response for MSC3886 POST endpoint (#14018) 2022-10-18 15:52:25 +00:00
metrics Add missing type hints to tests. (#14687) 2022-12-28 08:29:35 -05:00
module_api Add set_displayname to the module API (#14629) 2023-01-11 18:41:52 +00:00
push Factor out common code in tests and fix comments. (#14819) 2023-01-11 13:36:41 -05:00
replication Faster remote room joins: unblock tasks waiting for full room state when the un-partial-stating of that room is received over the replication stream. [rei:frrj/streams/unpsr] (#14474) 2022-12-06 15:48:42 +00:00
rest Implement MSC3925: changes to bundling of edits (#14811) 2023-01-10 16:31:28 +00:00
scripts
server_notices Remove redundant types from comments. (#14412) 2022-11-16 15:25:24 +00:00
state Fix typechecks against twisted trunk (#13061) 2022-06-15 11:49:58 +01:00
storage Re-enable some linting (#14821) 2023-01-12 10:52:07 +00:00
test_utils Support OIDC backchannel logouts (#11414) 2022-10-31 13:07:30 -04:00
types Allow selecting "prejoin" events by state keys (#14642) 2022-12-13 00:54:46 +00:00
util Fix stack overflow in _PerHostRatelimiter due to synchronous requests (#14812) 2023-01-13 00:16:21 +00:00
__init__.py
server.py Support OIDC backchannel logouts (#11414) 2022-10-31 13:07:30 -04:00
test_distributor.py
test_event_auth.py Rename the EventFormatVersions enum values so that they line up with room version numbers. (#13706) 2022-09-07 11:08:20 +01:00
test_federation.py Track when the pulled event signature fails (#13815) 2022-10-03 14:53:29 -05:00
test_mau.py Remove remaining bits of groups code. (#12936) 2022-06-01 09:41:25 -04:00
test_phone_home.py Share some metrics between the Prometheus exporter and the phone home stats (#13671) 2022-09-05 10:26:43 +00:00
test_rust.py Add a stub Rust crate (#12595) 2022-09-06 19:01:37 +01:00
test_server.py Respond with proper error responses on unknown paths. (#14621) 2022-12-08 11:37:05 -05:00
test_state.py Faster room joins: avoid blocking when pulling events with missing prevs (#13355) 2022-07-26 12:39:23 +01:00
test_terms_auth.py Use literals in place of HTTPStatus constants in tests (#13463) 2022-08-05 16:59:09 +02:00
test_test_utils.py
test_types.py Fix error in is_mine_id when encountering a malformed ID (#13746) 2022-09-08 15:54:36 +01:00
test_visibility.py Faster joins: filter out non local events when a room doesn't have its full state (#14404) 2022-11-21 16:46:14 +01:00
unittest.py Remove redundant types from comments. (#14412) 2022-11-16 15:25:24 +00:00
utils.py Modernize unit tests configuration settings for workers. (#14568) 2022-12-01 07:38:27 -05:00