sshd kernel segfault with FIPS and kerberos

Solution Verified - Updated -

Issue

  • SSH client opens/closes connection to server without prompting for credentials.
  • Expect to see credential prompt, or auto GSSAPI login.
  • SSH was working as expected previously, before 7.6

  • Journal entry:

Nov 19 09:56:59 $SERVERNAME kernel: sshd[26319]: segfault at 0 ip           (null) sp 00007fffc8f705b8 error 14 in sshd[559746ef1000+c8000]
Nov 19 10:07:44 $SERVERNAME kernel: sshd[28126]: segfault at 0 ip           (null) sp 00007ffd3536cc38 error 14 in sshd[555c9f2fb000+c8000]
Nov 19 10:13:24 $SERVERNAME kernel: sshd[37451]: segfault at 0 ip           (null) sp 00007ffc27a30988 error 14 in sshd[5627df937000+c8000]

Environment

  • RHEL 7.6 - openssh-server-7.4p1-16.el7.x86_64
  • FIPS is enabled
  • krb5

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