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Willy Tarreau 2a67aa0a51 BUG/MAJOR: resolvers: add other missing references during resolution removal 
There is a fundamental design bug in the resolvers code which is that
a list of active resolutions is being walked to try to delete outdated
entries, and that the code responsible for removing them also removes
other elements, including the next one which will be visited by the
list iterator. This randomly causes a use-after-free condition leading
to crashes, infinite loops and various other issues such as random memory
corruption.

A first fix for the memory fix for this was brought by commit 0efc0993e
("BUG/MEDIUM: resolvers: Don't release resolution from a requester
callbacks"). While preparing for more fixes, some code was factored by
commit 11c6c3965 ("MINOR: resolvers: Clean server in a dedicated function
when removing a SRV item"), which inadvertently passed "0" as the "safe"
argument all the time, missing one case of removal protection, instead
of always using "safe". This patch reintroduces the correct argument.

This must be backported with all fixes above.

Cc: Christopher Faulet <cfaulet@haproxy.com>
2021-10-20 17:52:36 +02:00
.github CI: Clean up formatting in GitHub Action definitions 2021-10-18 07:17:04 +02:00
addons MINOR: proxy: Introduce proxy flags to replace disabled bitfield 2021-10-15 14:12:19 +02:00
admin BUILD: halog: fix a -Wundef warning on non-glibc systems 2021-09-13 09:32:01 +02:00
dev DEV: coccinelle: Add strcmp.cocci 2021-10-18 07:17:04 +02:00
doc DOC: management: doc about the CLI httpclient 2021-10-19 15:02:42 +02:00
examples MEDIUM: proxy: remove long-broken 'option http_proxy' 2021-07-18 19:35:32 +02:00
include MINOR: jwt: jwt_verify returns negative values in case of error 2021-10-18 16:02:29 +02:00
reg-tests MINOR: jwt: jwt_verify returns negative values in case of error 2021-10-18 16:02:29 +02:00
scripts BUILD: adopt script/build-ssl.sh for OpenSSL-3.0.0beta2 2021-08-25 05:16:00 +02:00
src BUG/MAJOR: resolvers: add other missing references during resolution removal 2021-10-20 17:52:36 +02:00
tests CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
.cirrus.yml CI: introduce scripts/build-vtest.sh for installing VTest 2021-05-18 10:48:30 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore DOC: lua-api: Add documentation about lua filters 2021-08-15 20:56:44 +02:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml CI: travis-ci: temporarily disable arm64 builds 2021-08-07 07:28:15 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
CHANGELOG [RELEASE] Released version 2.5-dev10 2021-10-16 15:24:22 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS CONTRIB: move spoa_example out of the tree 2021-04-21 09:39:06 +02:00
Makefile MINOR: jwt: Parse JWT alg field 2021-10-14 16:38:08 +02:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
ROADMAP DOC: update the outdated ROADMAP file 2019-06-15 21:59:54 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.5-dev10 2021-10-16 15:24:22 +02:00
VERSION [RELEASE] Released version 2.5-dev10 2021-10-16 15:24:22 +02:00

README 

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)