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systemd reads from urandom before initialization #4167

@falconindy

Description

@falconindy

Submission type

  • Bug report
  • Request for enhancement (RFE)

systemd version the issue has been seen with

v231

Used distribution

Arch Linux

In case of bug report: Unexpected behaviour you saw

On bootup, the kernel reports:

Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)
Sep 10 13:44:57 localhost kernel: random: systemd: uninitialized urandom read (16 bytes read, 3 bits of entropy available)

In some cases, this appears for more than just systemd but also systemd-udevd, systemd-tmpfiles, and maybe others.

ref: https://bugs.archlinux.org/task/50798

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