HAProxy - Load balancer
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Christopher Faulet 07f88d7582 BUG/MAJOR: mux-h2: Properly detect too large frames when decoding headers
In the function decoding payload of HEADERS frames, an internal error is
returned if the frame length is too large. it cannot exceed the buffer
size. The same is true when headers are splitted on several frames. The
payload of HEADERS and CONTINUATION frames are merged and the overall size
must not exceed the buffer size.

However, there is a bug when the current frame is big enough to only have
the space for a part of the header of the next frame. Because, in this case,
we wait for more data, to have the whole frame header. We don't properly
detect that the headers are too large to be stored in one buffer. In fact
the test to trigger this error is not accurate. When the buffer is full, the
error is reported if the frame length exceeds the amount of data in the
buffer. But in reality, an error must be reported when we are unable to
decode the current frame while the buffer is full. Because, in this case, we
know there is no way to change this state.

When the bug happens, the H2 connection is woken up in loop, consumming all
the CPU. But the traffic is not blocked for all that.

This patch must be backported as far as 2.0.
2021-04-21 12:13:12 +02:00
.github CONTRIB: move src/wurfl.c and contrib/wurfl to addons/wurfl 2021-04-02 17:48:42 +02:00
addons CLEANUP: lists/tree-wide: rename some list operations to avoid some confusion 2021-04-21 09:20:17 +02:00
admin MINOR: freq_ctr: unify freq_ctr and freq_ctr_period into freq_ctr 2021-04-11 11:11:27 +02:00
contrib/mod_defender CONTRIB: move modsecurity out of the tree 2021-04-21 11:30:43 +02:00
dev CLEANUP: dev/flags: remove useless test in the stdin number parser 2021-04-03 15:29:10 +02:00
doc MINOR: server: implement delete server cli command 2021-04-21 11:00:31 +02:00
examples CLEANUP: assorted typo fixes in the code and comments 2020-06-26 11:27:28 +02:00
include CLEANUP: lists/tree-wide: rename some list operations to avoid some confusion 2021-04-21 09:20:17 +02:00
reg-tests MINOR: server: implement delete server cli command 2021-04-21 11:00:31 +02:00
scripts BUILD: Makefile: move REGTESTST_TYPE default setting 2021-02-05 11:41:16 +01:00
src BUG/MAJOR: mux-h2: Properly detect too large frames when decoding headers 2021-04-21 12:13:12 +02:00
tests CLEANUP: lists/tree-wide: rename some list operations to avoid some confusion 2021-04-21 09:20:17 +02:00
.cirrus.yml CI: cirrus: install "pcre" package 2021-04-15 08:35:46 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore CONTRIB: move modsecurity out of the tree 2021-04-21 11:30:43 +02:00
.travis.yml CI: travis-ci: enable weekly graviton2 builds 2021-04-15 17:10:22 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
CHANGELOG [RELEASE] Released version 2.4-dev16 2021-04-09 17:10:39 +02:00
CONTRIBUTING DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
INSTALL DOC: add a few words about USE_* and the addons directory 2021-04-02 17:48:42 +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: pools: rename CONFIG_HAP_LOCAL_POOLS to CONFIG_HAP_POOLS 2021-04-19 15:24:33 +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 2.4-dev16 2021-04-09 17:10:39 +02:00
VERSION [RELEASE] Released version 2.4-dev16 2021-04-09 17:10:39 +02:00

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)