HAProxy - Load balancer
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Willy Tarreau 413f6f9a1f BUG/MEDIUM: net_helper: fix a remaining possibly infinite loop in converters
The various tcp_option_* converters rely on tcp_fullhdr_find_opt() to
find the option. However, the same bug as fixed in commit dbf471f99a
("BUG/MAJOR: net_helper: ip.fp infinite loop on malformed tcp options")
was also present there, by which an option of length 0 could be looped
over indefinitely. In practice this does not happen since such options
are not valid, but if passed encoded in an HTTP header for example, it
could possibly be passed.

While fixing it, let's check for length >1 in all 3 locations insteead
of only non-zero, since there's no point processing a malformed option
that wouldn't even be properly skipped.

This fix doesn't need to be backported, unless the ip.fp series is.

Thanks to @Vincent55 for reporting this issue.
2026-05-21 15:05:39 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons BUILD: 51d.c: cleanup, fix preprocessor ifdefs 2026-05-13 17:00:20 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc MINOR: config: shm-stats-file is no longer experimental 2026-05-21 08:50:20 +02:00
examples MEDIUM: mux_quic: rename qmux traces to qcm 2026-05-13 16:23:58 +02:00
include MINOR: intops: add a multiply overflow detection for ulong and size_t 2026-05-20 17:05:19 +02:00
reg-tests BUG/MINOR: h1: Don't mask websocket protocol if multiple protocols used 2026-05-19 17:50:50 +02:00
scripts SCRIPTS: announce-release: add a link to the OpenTelemetry filter 2026-05-08 12:05:09 +02:00
src BUG/MEDIUM: net_helper: fix a remaining possibly infinite loop in converters 2026-05-21 15:05:39 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES CLEANUP: tree-wide: fix typos in user-invisible files 2026-05-13 17:03:48 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL DOC: update supported gcc and openssl versions in INSTALL 2026-05-20 17:45:23 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile BUILD: traces: add USE_TRACE allowing to disable traces 2026-05-20 11:46:43 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00
VERSION [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00

HAProxy

AWS-LC Illumos NetBSD CrossCompile FreeBSD VTest

HAProxy logo

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:

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.