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A crash could occured if a session_add_conn() would temporarily failed when called via h2_detach(). In this case, connection owner is reset to NULL. However, if this wasn't the last connection stream, the connection won't be destroyed. When h2_detach() is recalled for another stream and this time session_add_conn() succeeds, a crash will occur due to session_check_idle_conn() invocation with a NULL connection owner. To fix this, ensure connection owner is always set after session_add_conn() success. This bug is considered as minor as the only failure reason for session_add_conn() is a pool allocation issue. This should be backported up to all stable releases.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)