gRPC SIGSEGV example

This repo reproduces a bug with gRPC / eventlet causing a SIGSEGV

setup

git submodule update --init --recursive

Fill in account details in app.py (DEVELOPER_TOKEN, etc.)

python3 -m venv env
source env/bin/activate
pip install --upgrade pip setuptools
GRPC_PYTHON_CFLAGS='-g' pip install -r requirements.txt

run

./app.py
# or run with gunicorn:
./run-with-gunicorn.sh

Go to https://localhost:5000/ in your browser. The flask server should crash with assertion failed. If running with gunicorn, the worker will crash and restart. If not, try again but it is fairly likely.

Example Output

127.0.0.1 - - [05/May/2022 09:26:09] "GET / HTTP/1.1" 200 -
E0505 09:26:15.737590610  200702 activity.h:154]             assertion failed: g_current_activity_ == nullptr
Fatal Python error: Aborted

Current thread 0x00007f35f7446740 (most recent call first):
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/grpc/_channel.py", line 595 in _consume_next_event
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/grpc/_channel.py", line 607 in _next_response
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/grpc/_channel.py", line 642 in _next
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/grpc/_channel.py", line 426 in __next__
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/google/ads/googleads/interceptors/response_wrappers.py", line 88 in __next__
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/google/api_core/grpc_helpers.py", line 73 in __init__
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/google/api_core/grpc_helpers.py", line 147 in error_remapped_callable
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/google/api_core/gapic_v1/method.py", line 154 in __call__
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/google/ads/googleads/v10/services/services/google_ads_service/client.py", line 3426 in search_stream
  File "/home/amohr/work/grpc-sigsegv/app.py", line 49 in test
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/flask/app.py", line 1509 in dispatch_request
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/flask/app.py", line 1523 in full_dispatch_request
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/flask/app.py", line 2077 in wsgi_app
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/flask/app.py", line 2095 in __call__
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/werkzeug/debug/__init__.py", line 311 in debug_application
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/werkzeug/serving.py", line 324 in execute
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/werkzeug/serving.py", line 335 in run_wsgi
  File "/opt/python-dbg/lib/python3.10/http/server.py", line 415 in handle_one_request
  File "/opt/python-dbg/lib/python3.10/http/server.py", line 427 in handle
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/werkzeug/serving.py", line 363 in handle
  File "/opt/python-dbg/lib/python3.10/socketserver.py", line 747 in __init__
  File "/opt/python-dbg/lib/python3.10/socketserver.py", line 360 in finish_request
  File "/opt/python-dbg/lib/python3.10/socketserver.py", line 683 in process_request_thread
  File "/opt/python-dbg/lib/python3.10/threading.py", line 946 in run
  File "/opt/python-dbg/lib/python3.10/threading.py", line 1009 in _bootstrap_inner
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/eventlet/green/thread.py", line 64 in wrap_bootstrap_inner
  File "/opt/python-dbg/lib/python3.10/threading.py", line 966 in _bootstrap
  File "/home/amohr/work/grpc-sigsegv/env/lib/python3.10/site-packages/eventlet/green/thread.py", line 43 in __thread_body

Extension modules: greenlet._greenlet, __original_module__thread, __original_module_select, __original_module_time, markupsafe._speedups, grpc._cython.cygrpc, google.protobuf.pyext._message, yaml._yaml (total: 8)