PROBLEM: (QCABBY005) (PATCH ID: TCR505-045)
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This patch fixes a panic which can occur on a V5.0A TruCluster system.
The panic will look similar to this:

   5 panic
   6 trap
   7 _XentMM
   8 free
   9 in_pcbfree
  10 tcp_input_common
  11 tcp_input
  12 ipintr
  13 netisr_thread