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Willy Tarreau a5efdff93c BUG/MEDIUM: lua: fix memory leaks with realloc() on non-glibc systems 
In issue #1406, Lev Petrushchak reported a nasty memory leak on Alpine
since haproxy 2.4 when using Lua, that memory profiling didn't detect.
After inspecting the code and Lua's code, it appeared that Lua's default
allocator does an explicit free() on size zero, while since 2.4 commit
d36c7fa5e ("MINOR: lua: simplify hlua_alloc() to only rely on realloc()"),
haproxy only calls realloc(ptr,0) that performs a free() on glibc but not
on other systems as it's not required by POSIX...

This patch reinstalls the explicit test for nsize==0 to call free().

Thanks to Lev for the very documented report, and to Tim for the links
to a musl thread on the same subject that confirms the diagnostic.

This must be backported to 2.4.
2021-10-22 16:40:09 +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: quic: Increase the size of handshake RX UDP datagrams 2021-10-22 15:48:19 +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/MEDIUM: lua: fix memory leaks with realloc() on non-glibc systems 2021-10-22 16:40:09 +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
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
SUBVERS
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)