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12cf8d4db7
Multiple error paths made invalid use of lua_pop(): When the stack is emptied using lua_settop(0), lua_pop() (which is implemented as a lua_settop() macro) should not be used right after, because it could lead to invalid reads since the stack is already empty. Unfortunately, some remnants from initial lua stack implementation kept doing so, resulting in haproxy crashs on some lua runtime errors paths from time to time (ie: ERRRUN, ERRMEM). Moreover, the extra lua_pop() instruction, even if it was safe, is totally pointless in such case. Removing such unsafe lua_pop() statements when we know that the stack is already empty. This must be backported in every stable versions.
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)