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Willy Tarreau 6f97b4ef33 BUG/MEDIUM: leastconn: fix rare possibility of divide by zero 
An optimization was brought in commit 5064ab6a9 ("OPTIM: lb-leastconn:
do not unlink the server if it did not change") to avoid locking the
server just to discover it did not move. However a mistake was made
because the operation involves a divide with a value that is read
outside of its usual lock, which makes it possible to be zero at the
exact moment we watch it if another thread takes the server down under
the lbprm lock, resulting in a divide by zero.

Therefore we must check that the value is not null there.

This must be backported to 2.4.
 		2021-09-22 07:24:02 +02:00
.github CI: Github Actions: re-enable Opentracing 2021-09-12 07:08:14 +02:00
addons CLEANUP: Apply ist.cocci 2021-09-17 17:22:05 +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 xalloc_cast.cocci 2021-09-17 17:22:05 +02:00
doc MEDIUM: listener: deprecate "process" in favor of "thread" on bind lines 2021-09-21 14:35:42 +02:00
examples MEDIUM: proxy: remove long-broken 'option http_proxy' 2021-07-18 19:35:32 +02:00
include CLEANUP: Apply xalloc_size.cocci 2021-09-17 17:22:05 +02:00
reg-tests BUG/MINOR: tcpcheck: Improve LDAP response parsing to fix LDAP check 2021-09-16 17:24:50 +02:00
scripts BUILD: adopt script/build-ssl.sh for OpenSSL-3.0.0beta2 2021-08-25 05:16:00 +02:00
src BUG/MEDIUM: leastconn: fix rare possibility of divide by zero 2021-09-22 07:24:02 +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-dev7 2021-09-12 11:36:38 +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
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MAINTAINERS CONTRIB: move spoa_example out of the tree 2021-04-21 09:39:06 +02:00
Makefile BUILD: opentracing: exclude the use of haproxy variables for the OpenTracing context 2021-09-12 07:07:13 +02:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
ROADMAP
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SUBVERS
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VERDATE [RELEASE] Released version 2.5-dev7 2021-09-12 11:36:38 +02:00
VERSION [RELEASE] Released version 2.5-dev7 2021-09-12 11:36:38 +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)