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This patch fixes a crash bug (assertion failure) in the PT subsystem that could get triggered if the user cancels bootstrap via the UI in TorBrowser. This would cause Tor to call `managed_proxy_destroy()` which called `process_free()` after it had called `process_terminate()`. This leads to a crash when the various process callbacks returns with data after the `process_t` have been freed using `process_free()`. We solve this issue by ensuring that everywhere we call `process_terminate()` we make sure to detach the `managed_proxy_t` from the `process_t` (by calling `process_set_data(process, NULL)`) and avoid calling `process_free()` at all in the transports code. Instead we just call `process_terminate()` and let the process exit callback in `managed_proxy_exit_callback()` handle the `process_free()` call by returning true to the process subsystem. See: https://bugs.torproject.org/29562 |
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warning_flags.in |
Tor protects your privacy on the internet by hiding the connection between your Internet address and the services you use. We believe Tor is reasonably secure, but please ensure you read the instructions and configure it properly. To build Tor from source: ./configure && make && make install To build Tor from a just-cloned git repository: sh autogen.sh && ./configure && make && make install Home page: https://www.torproject.org/ Download new versions: https://www.torproject.org/download/download.html Documentation, including links to installation and setup instructions: https://www.torproject.org/docs/documentation.html Making applications work with Tor: https://wiki.torproject.org/projects/tor/wiki/doc/TorifyHOWTO Frequently Asked Questions: https://www.torproject.org/docs/faq.html To get started working on Tor development: See the doc/HACKING directory. Release timeline: https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases