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In issue #1563, Coverity reported a very interesting issue about a possible UAF in the config parser if the config file ends in with a very large line followed by an empty one and the large one causes an allocation failure. The issue essentially is that we try to go on with the next line in case of allocation error, while there's no point doing so. If we failed to allocate memory to read one config line, the same may happen on the next one, and blatantly dropping it while trying to parse what follows it. In the best case, subsequent errors will be incorrect due to this prior error (e.g. a large ACL definition with many patterns, followed by a reference of this ACL). Let's just immediately abort in such a condition where there's no recovery possible. This may be backported to all versions once the issue is confirmed to be addressed. Thanks to Ilya for the report. |
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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)