[Bug 1785723] [NEW] Memory leak in systemd-journald

[Paul]

Public bug reported:

systemd-journald has 144 MiB resident after 35 days. After a reboot this
drops to 23 MiB. All logging config is stock except that logs rotate
monthly, and the machine is not used as a syslog server.

This is a very lightly loaded web and mail server, < 10 requests per
hour. /var/log/journal/.../system.journal grows by 10-15 MiB per day,
mostly logging automated attacks against SSH, SMTP, and random ports.

The journal daemon uses more memory than all other daemons combined. I
sure hope this is a leak and not by design ...

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: systemd 237-3ubuntu10.3
ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
Uname: Linux 4.15.0-24-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Mon Aug  6 22:54:34 2018
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: DigitalOcean Droplet
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic root=UUID=5de0cac7-17b6-4a0f-8715-54cfaaa0a9a9 ro console=tty1 console=ttyS0
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/12/2017
dmi.bios.vendor: DigitalOcean
dmi.bios.version: 20171212
dmi.chassis.type: 1
dmi.chassis.vendor: Bochs
dmi.modalias: dmi:bvnDigitalOcean:bvr20171212:bd12/12/2017:svnDigitalOcean:pnDroplet:pvr20171212:cvnBochs:ct1:cvr:
dmi.product.family: DigitalOcean_Droplet
dmi.product.name: Droplet
dmi.product.version: 20171212
dmi.sys.vendor: DigitalOcean

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


** Tags: amd64 apport-bug bionic uec-images

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https://bugs.launchpad.net/bugs/1785723

Title:
  Memory leak in systemd-journald

Status in systemd package in Ubuntu:
  New

Bug description:
  systemd-journald has 144 MiB resident after 35 days. After a reboot
  this drops to 23 MiB. All logging config is stock except that logs
  rotate monthly, and the machine is not used as a syslog server.

  This is a very lightly loaded web and mail server, < 10 requests per
  hour. /var/log/journal/.../system.journal grows by 10-15 MiB per day,
  mostly logging automated attacks against SSH, SMTP, and random ports.

  The journal daemon uses more memory than all other daemons combined. I
  sure hope this is a leak and not by design ...

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: systemd 237-3ubuntu10.3
  ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
  Uname: Linux 4.15.0-24-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Mon Aug  6 22:54:34 2018
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: DigitalOcean Droplet
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic root=UUID=5de0cac7-17b6-4a0f-8715-54cfaaa0a9a9 ro console=tty1 console=ttyS0
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/12/2017
  dmi.bios.vendor: DigitalOcean
  dmi.bios.version: 20171212
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnDigitalOcean:bvr20171212:bd12/12/2017:svnDigitalOcean:pnDroplet:pvr20171212:cvnBochs:ct1:cvr:
  dmi.product.family: DigitalOcean_Droplet
  dmi.product.name: Droplet
  dmi.product.version: 20171212
  dmi.sys.vendor: DigitalOcean

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