[Bug 231080] Possible HPET timer panic

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Sep 1 19:02:42 UTC 2018


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231080

--- Comment #3 from Mark Johnston <markj at FreeBSD.org> ---
(In reply to Konstantin Belousov from comment #1)
Indeed, this is the result of a corrupted callout structure:

(kgdb) p *cc->cc_callwheel[firstb & callwheelmask].lh_first->c_links.le.le_next
$12 = {
  c_links = {
    le = {
      le_next = 0x40, 
      le_prev = 0xfffff800051ef9b0
    }, 
    sle = {
      sle_next = 0x40
    }, 
    tqe = {
      tqe_next = 0x40, 
      tqe_prev = 0xfffff800051ef9b0
    }
  }, 
  c_time = 4, 
  c_precision = 20, 
  c_arg = 0x7fffffffef70, 
  c_func = 0x15, 
  c_lock = 0x18, 
  c_flags = 22, 
  c_iflags = 0, 
  c_cpu = 0
}

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