Amaury Denoyelle 78d244e9f7 BUG/MINOR: quic: fix decrement of half_open counter on qc alloc failure
Half open counter is used to comptabilize QUIC connections waiting for
address validation. It was recently reworked to adjust its scope. With
each decrement operation, a BUG_ON() was added to ensure the counter
never wraps.

This BUG_ON() could be triggered if an allocation fails for one of
quic_conn members in qc_new_conn(). This is because half open counter is
incremented at the end of qc_new_conn(). However, in case of alloc
failure, quic_conn_release() is called immediately to ensure the counter
is decremented if a connection is freed before peer address has been
validated.

To fix this, increment half open counter early in qc_new_conn() prior to
every quic_conn members allocations.

This issue was reproduced using -dMfail argument.

This issue has been introduced by
  commit 278808915b05bab1ff1e08e95fe32be22109719f
  MINOR: quic: reduce half open counters scope

No need to backport.
2023-11-13 11:16:41 +01:00
2021-09-16 09:14:14 +02:00
2023-11-04 09:38:16 +01:00
2023-11-04 09:38:16 +01:00
2023-11-04 09:38:16 +01:00

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)
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