RHEL kernel 2.6.32-642 failed to load the NFS kernel modules nfs.ko and nfsd.ko

Solution Verified - Updated -

Issue

  • Patching 4 servers which had NFS mounts resulted in kernel 2.6.32-642 being installed. Upon reboot this kernel failed to load the NFS kernel modules.

    kernel: lockd: Unknown symbol unregister_inet6addr_notifier
kernel: lockd: Unknown symbol register_inet6addr_notifier
modprobe: FATAL: Error inserting nfs (/lib/modules/2.6.32-642.el6.x86_64/kernel/fs/nfs/nfs.ko): Unknown symbol in module, or unknown parameter (see dmesg)

Environment

  • Red Hat Enterprise Linux 6
  • kernel 2.6.32-642.el6.x86_64 (NFS Client)

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