Red Hat Enterprise Linux 5 panics at nfs4_callback_compound

Solution Verified - Updated -

Issue

  • kernel oops in nfs4_callback_compound
  • Just prior to the oops on 2.6.18-194 kernel, the following messages are seen
May 22 03:00:01 hostname1 kernel: NFSv4 callback reply buffer overflowed!

May 22 03:00:01 hostname1 kernel: NFSv4 callback reply buffer overflowed!

May 22 03:00:01 hostname1 kernel: Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:

May 22 03:00:01 hostname1 kernel:  [<ffffffff88559362>] :nfs:nfs4_callback_compound+0x2dd/0x314

Environment

  • Red Hat Enterprise Linux 5 (NFS4 client)
    • kernel earlier than kernel-2.6.18-308.el5

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