Unexplained Page Fault triggers kernel panic on ASRockRack hardware

Issue

• Kernel panic caused by an unexplained Page Fault (memory request). These could be logged as (but not limited to):
  • A BUG: unable to handle kernel paging request at <address> panic message
  • A general protection fault (GFP) panic message
  • A double fault occurring on two CPU's (can occur prior to the actual panic)
  • A CPU Hard Lockup
• Exception pointers (RIP) seen (but not limited to) in the functions below:
  • memcpy_erms()
  • clear_page_erms()
  • copy_page()
  • dup_fd()
  • do_double_fault()
  • tick_nohz_next_event() (seen during hard lockup)
• At boot time or shortly after, a Kernel Warning at arch/x86/kernel/alternative.c may or may not be logged with RIP in __text_poke()