[Bug 1778932] [NEW] rsync can trigger system crash

[kelargo]

Public bug reported:

I'm not sure how much of this is rsync or something else in my system. I
can reliably trigger this using rsync to transfer files from one drive
to another drive on my computer.   the source is ssd and destination is
mdadm raid 1 partition.  will attach syslog messages. after it is
triggered, the the system becomes unresponsive and requires a hard
reboot. running rysnc as user, no special privileges.

 
root at music:~# lsb_release -rd
Description:	Ubuntu 18.04 LTS
Release:	18.04


 apt-cache policy rsync 
rsync:
  Installed: 3.1.2-2.1ubuntu1
  Candidate: 3.1.2-2.1ubuntu1
  Version table:
 *** 3.1.2-2.1ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status


uname -a
Linux music 4.15.0-23-lowlatency #25-Ubuntu SMP PREEMPT Wed May 23 20:39:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: rsync 3.1.2-2.1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-23.25-lowlatency 4.15.18
Uname: Linux 4.15.0-23-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Wed Jun 27 10:08:36 2018
InstallationDate: Installed on 2018-03-31 (87 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180327)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
 TERM=xterm-256color
 LANGUAGE=en_US
 PATH=(custom, no user)
SourcePackage: rsync
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: rsync (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1778932

Title:
  rsync can trigger system crash

Status in rsync package in Ubuntu:
  New

Bug description:
  I'm not sure how much of this is rsync or something else in my system.
  I can reliably trigger this using rsync to transfer files from one
  drive to another drive on my computer.   the source is ssd and
  destination is mdadm raid 1 partition.  will attach syslog messages.
  after it is triggered, the the system becomes unresponsive and
  requires a hard reboot. running rysnc as user, no special privileges.

   
  root at music:~# lsb_release -rd
  Description:	Ubuntu 18.04 LTS
  Release:	18.04

  
   apt-cache policy rsync 
  rsync:
    Installed: 3.1.2-2.1ubuntu1
    Candidate: 3.1.2-2.1ubuntu1
    Version table:
   *** 3.1.2-2.1ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status

  
  uname -a
  Linux music 4.15.0-23-lowlatency #25-Ubuntu SMP PREEMPT Wed May 23 20:39:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: rsync 3.1.2-2.1ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-23.25-lowlatency 4.15.18
  Uname: Linux 4.15.0-23-lowlatency x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Wed Jun 27 10:08:36 2018
  InstallationDate: Installed on 2018-03-31 (87 days ago)
  InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180327)
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
   TERM=xterm-256color
   LANGUAGE=en_US
   PATH=(custom, no user)
  SourcePackage: rsync
  UpgradeStatus: No upgrade log present (probably fresh install)

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