2ec387cdc2
As reported by GH user @Lzq-001 on issue #3245, the config below would cause haproxy to SEGFAULT after having reported an error: frontend 0000000 http-request set-map %[hdr(0000)0_ Root cause is simple, in parse_http_set_map(), we define the release function (which is responsible to clear lf_expr expressions used by the action), prior to initializing the expressions, while the release function assumes the expressions are always initialized. For all similar actions, we already perform the init prior to setting the related release function, but this was not the case for parse_http_set_map(). We fix the bug by initializing the expressions earlier. Thanks to @Lzq-001 for having reported the issue and provided a simple reproducer. It should be backported to all stable versions, note for versions prior to 3.0, lf_expr_init() should be replace by LIST_INIT(), see 6810c41 ("MEDIUM: tree-wide: add logformat expressions wrapper")
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.