rhel5: executing "bt -a" in crash outputs warning message "possibly bogus exception frame"

Issue

On RHEL5.11 Errata(RHSA-2018:0292), "bt -a" of crash outputs the warning message, "WARNING: possibly bogus exception frame". "bt -a" normally displays the kernel stack traces of the active task on each CPU, but the warning message is output on some CPUs.

Here is the warning message:

crash> bt -a
  <snip>
   PID: 0      TASK: ffff810108fac0c0  CPU: 22  COMMAND: "swapper"
   #0 [ffff81047ff8ff20] crash_nmi_callback at ffffffff80080f15
   #1 [ffff81047ff8ff40] do_nmi at ffffffff80067677
   #2 [ffff81047ff8ff50] nmi at ffffffff80066c28
      [exception RIP: mwait_idle_with_hints+102]
      RIP: ffffffff800700df  RSP: ffff81047ff99ea0  RFLAGS: 00000046
      RAX: 0000000000000010  RBX: 151966a175ee3008  RCX: 0000000000000001
      RDX: 0000000000000000  RSI: 0000000000000001  RDI: 0000000000000010
      RBP: ffff81047ff74910   R8: 00000000000d40d5   R9: 0000000000000029
      R10: ffff8102870c0890  R11: 0000000010008040  R12: 0000000000000016
      R13: ffff81047ff74800  R14: 0000000000001600  R15: ffffffff80467520
      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
   --- <DOUBLEFAULT exception stack> ---
   #3 [ffff81047ff99ea0] mwait_idle_with_hints at ffffffff800700df
   #4 [ffff81047ff99ea0] acpi_processor_idle_simple at ffffffff801ad329
   #5 [ffff81047ff99ef0] cpu_idle at ffffffff8004ba88
      [exception RIP: unknown or invalid address]
      RIP: 0000000000000000  RSP: 0000000000000000  RFLAGS: 00000000
      RAX: 0000000000000000  RBX: 0000000000000000  RCX: 0000000000000000
      RDX: 0000000000000000  RSI: 0000000000000000  RDI: 0000000000000000
      RBP: 0000000000000000   R8: 0000000000000000   R9: 0000000000000000
      R10: 0000000000000000  R11: 0000000000000000  R12: 0000000000000000
      R13: 0000000000000000  R14: 0000000000000000  R15: 0000000000000000
      ORIG_RAX: 0000000000000000  CS: 0000  SS: 0000
  bt: WARNING: possibly bogus exception frame
  --- <DEBUG exception stack> ---
  bt: cannot transition from exception stack to current process stack:
      exception stack pointer: ffff81047ff8ff20
        process stack pointer: 0
           current stack base: ffff81047ff98000

Also the kernel stack isn't printed as it should.