[Bug 1951298] [NEW] Proftpd is unusably slow when using mod_auth_file

[David Buckley]

Public bug reported:

There is bug in the current version of proftpd on 20.04 that results in
unusably slow responses and extremely high server load when using
mod_auth_file (AuthUserFile) for authentication.  This issue was fixed
upstream here:  https://github.com/proftpd/proftpd/pull/1195

I worked around this by rebuilding the package with mod_auth_file.c
updated from upstream, and have attached a quilt patch for this if it is
helpful (I tried to get a clean patch from just that PR but wasn't able
to).  We'd like to avoid having to rebuild the package for every update,
and would also like to ensure we get updates (especially security fixes)
installed as quickly as possible.

** Affects: proftpd-dfsg (Ubuntu)
     Importance: Undecided
         Status: New

** Patch added: "mod_auth_file_fixes.diff"
   https://bugs.launchpad.net/bugs/1951298/+attachment/5541517/+files/mod_auth_file_fixes.diff

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https://bugs.launchpad.net/bugs/1951298

Title:
  Proftpd is unusably slow when using mod_auth_file

Status in proftpd-dfsg package in Ubuntu:
  New

Bug description:
  There is bug in the current version of proftpd on 20.04 that results
  in unusably slow responses and extremely high server load when using
  mod_auth_file (AuthUserFile) for authentication.  This issue was fixed
  upstream here:  https://github.com/proftpd/proftpd/pull/1195

  I worked around this by rebuilding the package with mod_auth_file.c
  updated from upstream, and have attached a quilt patch for this if it
  is helpful (I tried to get a clean patch from just that PR but wasn't
  able to).  We'd like to avoid having to rebuild the package for every
  update, and would also like to ensure we get updates (especially
  security fixes) installed as quickly as possible.

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