kernel's security warning is sometimes output even if kernel.core_pattern and fs.suid_dumpable are configured correctly

Solution Verified - Updated -

Issue

Even if kernel.core_pattern and fs.suid_dumpable are configured correctly in /etc/sysctl.conf as:

  # grep -E "(core_pattern|fs.suid_dumpable)" /etc/sysctl.conf
  kernel.core_pattern=/var/tmp/core.%p.%e
  fs.suid_dumpable=2

the following kernel message is sometimes output on system boot:

  Unsafe core_pattern used with suid_dumpable=2. Pipe handler or fully qualified core dump path required.

In particular, there could be other kernel parameters that depend on the order in which they are configured
and thus are not configured as expected.

Environment

  • Red Hat Enterprise Linux 7
  • systemd

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