[Bug 1911051] [NEW] lsblk killed when given duplicate devices

[ov2k]

Public bug reported:

Ubuntu 20.04.1 LTS
util-linux 2.34-0.1ubuntu9.1

Running lsblk with the same device multiple times results in an OOM
error.

lsblk /dev/sda1 /dev/sda1
lsblk /dev/sda1 "/dev/disk/by-uuid/$(lsblk -no uuid /dev/sda1)"

For reference, this does not occur with Ubuntu 18.04.5 LTS (util-linux
2.31.1-0.4ubuntu3.7).

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1911051

Title:
  lsblk killed when given duplicate devices

Status in util-linux package in Ubuntu:
  New

Bug description:
  Ubuntu 20.04.1 LTS
  util-linux 2.34-0.1ubuntu9.1

  Running lsblk with the same device multiple times results in an OOM
  error.

  lsblk /dev/sda1 /dev/sda1
  lsblk /dev/sda1 "/dev/disk/by-uuid/$(lsblk -no uuid /dev/sda1)"

  For reference, this does not occur with Ubuntu 18.04.5 LTS (util-linux
  2.31.1-0.4ubuntu3.7).

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