SELinux AVC related to "connectto" with target context "kernel_t" is seen at boot

Solution Verified - Updated -

Issue

  • At boot, browsing the audit log, an AVC related to connecting to a Unix socket labelled with context system_u:system_r:kernel_t is seen, usually related to logging

    # ausearch -m avc -ts boot | grep AVC
type=AVC msg=audit(TIMESTAMP:ID): avc:  denied  { connectto } for  pid=PID comm="systemd-cat" path="/run/systemd/journal/stdout" scontext=system_u:system_r:radiusd_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=unix_stream_socket permissive=0

    In the example above, a program running as radiusd_t context wasn't able to send its output to systemd-journald's socket /run/systemd/journal/stdout.
    Source context scontext may vary.

Environment

  • Red Hat Enterprise Linux (RHEL) 7
    • selinux

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