anonymousland-synapse/synapse
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
..
_scripts Check sqlite database file exists before porting. (#14692) 2022-12-22 13:26:37 -05:00
api Calculate rooms changed for device lists to work. (#14810) 2023-01-11 12:16:41 +00:00
app Add listener health (#14747) 2023-01-11 12:00:38 +00:00
appservice Fix missing cache invalidation in application service code (#14670) 2022-12-12 18:13:43 +00:00
config Re-enable some linting (#14821) 2023-01-12 10:52:07 +00:00
crypto Stop using deprecated keyIds param on /key/v2/server (#14525) 2022-11-30 11:59:57 +00:00
events Implement MSC3925: changes to bundling of edits (#14811) 2023-01-10 16:31:28 +00:00
federation Failover on proper error responses. (#14620) 2022-12-06 07:23:03 -05:00
handlers Merge remote-tracking branch 'origin/release-v1.75' into develop 2023-01-12 16:45:23 +00:00
http Respond with proper error responses on unknown paths. (#14621) 2022-12-08 11:37:05 -05:00
logging Improve logging and opentracing for to-device message handling (#14598) 2022-12-06 09:52:55 +00:00
metrics Fix logging context warnings due to common usage metrics setup (#14574) 2022-11-28 15:25:18 +00:00
module_api Add set_displayname to the module API (#14629) 2023-01-11 18:41:52 +00:00
push Remove undocumented device from pushrules (#14727) 2023-01-09 17:17:24 +00:00
replication Batch up replication requests to request the resyncing of remote users's devices. (#14716) 2023-01-10 11:17:59 +00:00
res Fix #11308 : Remove dependency on jquery on reCAPTCHA page (#14672) 2022-12-14 12:02:28 +00:00
rest Fix stack overflow in _PerHostRatelimiter due to synchronous requests (#14812) 2023-01-13 00:16:21 +00:00
server_notices Remove redundant types from comments. (#14412) 2022-11-16 15:25:24 +00:00
spam_checker_api Fix import in module_api module and docs on the new check_event_for_spam signature (#12918) 2022-05-31 12:04:53 +02:00
state Allow compute_state_after_events to use partial state (#14676) 2022-12-14 14:52:35 +00:00
static Add viewport directive to HTML templates to optimise for mobile (#13493) 2022-08-11 14:04:20 +01:00
storage Merge remote-tracking branch 'origin/release-v1.75' into develop 2023-01-12 16:45:23 +00:00
streams Implement message forward pagination from start when no from is given, fixes #12383 (#14149) 2022-11-24 09:10:51 +00:00
types Batch up replication requests to request the resyncing of remote users's devices. (#14716) 2023-01-10 11:17:59 +00:00
util Fix stack overflow in _PerHostRatelimiter due to synchronous requests (#14812) 2023-01-13 00:16:21 +00:00
__init__.py Parse SYNAPSE_ASYNC_IO_REACTOR env variable & log the reactor on startup (#14092) 2022-10-07 15:19:59 +01:00
event_auth.py Improve validation of field size limits in events. (#14664) 2022-12-13 13:19:19 +00:00
notifier.py Batch up notifications after event persistence (#14033) 2022-10-05 10:12:48 -07:00
py.typed Mark Module API error imports as re-exported and mark Synapse as containing type annotations (#11054) 2021-10-13 08:42:41 +01:00
server.py Fix stack overflow in _PerHostRatelimiter due to synchronous requests (#14812) 2023-01-13 00:16:21 +00:00
visibility.py Move StateFilter to synapse.types (#14668) 2022-12-12 16:19:30 +00:00