29592cb330
mystrtod() was not length-aware and relied on null-termination or a non-numeric character to stop. The fix adds a length parameter as a strict upper bound for all pointer accesses. The practical impact in haproxy is essentially null: all callers embed the JSON payload inside a large haproxy buffer, so the speculative read past the last digit lands on memory that is still within the same allocation. ASAN cannot detect it in a normal haproxy run for the same reason — the overread never escapes the enclosing buffer. Triggering a detectable fault requires placing the JSON payload at the exact end of an allocation. Note: the 'path' buffer was using a null-terminated string so the result of strlen is passed to it, this part was not at risk. Thanks to Kamil Frankowicz for the original bug report. This patch must be backported to all maintained versions.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.