[Bug 1888685] Re: rsync fails after installing level 3.2.1

[Paride Legovini]

OK, so the directory being in /home is the culprit, I could reproduce
the issue and found where the problem is. At some point rsync added

  ProtectHome=on
  
option to its service file, /lib/systemd/system/rsync.service. This has been reverted in upstream git at [1] as it's too restrictive. The fix landed in rsync v3.2.2 which is already in Debian; Ubuntu will pick it up with the next sync. In the meantime you can workaround the problem by manually disabling ProtectHome.

Thanks again for reporting the issue and for providing all the details.

[1]
https://github.com/WayneD/rsync/commit/ce12142c459788b611da5f5d525e0486822b043a

** Changed in: rsync (Ubuntu)
       Status: Incomplete => Triaged

** Changed in: rsync (Ubuntu)
    Milestone: None => ubuntu-20.10

** Also affects: rsync (Debian)
   Importance: Undecided
       Status: New

** Changed in: rsync (Debian)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1888685

Title:
  rsync fails after installing level 3.2.1

Status in rsync package in Ubuntu:
  Triaged
Status in rsync package in Debian:
  Fix Released

Bug description:
  After installation of rsync.3.2.1 my attempt to sync fails with chroot
  error.  The rsyncd.log indicates that rsync can't find the directories
  I want to sync.

  2020/07/18 10:01:20 [3689] rsyncd version 3.2.1 starting, listening on port 873
  2020/07/18 11:00:01 [5786] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5786] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5786] rsync allowed access on module Bin_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5786] rsync: [Receiver] chroot /home/cliff/Bin failed: No such file or directory (2)
  2020/07/18 11:00:01 [5794] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5794] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5794] rsync allowed access on module Bin_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5794] rsync: [Receiver] chroot /home/cliff/Bin failed: No such file or directory (2)
  2020/07/18 11:00:01 [5795] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5795] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5795] rsync allowed access on module Drawings_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5795] rsync: [Receiver] chroot /home/cliff/Drawings failed: No such file or directory (2)

  Dropping back to Ubuntu 20.04 and rsync works again.  The rsync update
  was install 7/18.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: rsync 3.2.1-1ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu42
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Jul 23 10:28:17 2020
  InstallationDate: Installed on 2020-07-06 (16 days ago)
  InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200609)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: rsync
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.default.rsync: 2020-07-06T11:31:56.141217

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