[Bug 271465] Fatal trap 1: privileged instruction fault

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271465

            Bug ID: 271465
           Summary: Fatal trap 1: privileged instruction fault
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: 1041netohai@gmail.com

Hello. I tried using FreeBSD for the first time, but I encountered an error
that I don't understand.

ada2: Command Queueing enabled ada2: 8192MB (16777216 512 byte sectors)
kernel trap 1 with interrupts disabled
Fatal trap 1: privileged instruction fault while in kernel mode cpuid 0; apic
id = 00
instruction pointer = 0x20:0xffffffff8122c1a3
stack pointer = 0x28:0xfffffe001879ac20 
frame pointer = 0x28:0xfffffe001879ac30
code segment = base 0x0, limit 0xfffff, type 0x1b
             = DPL 0, pres 1, long 1, long 1, def32 0, gran 1
processor ef lags = resume, Yes 1, long 1, def32 0, gran 1
processor ef lags = resume, IOPL = 0
current process = 11 (idle: cpu0)
trap number = 1
panic: privileged instruction fault
cpuid = 0
time = 19
KDB: stack backtrace:
#0 0xffffffff80c0ad75 at kdb_backtrace+0x65
#1 0xffffffff88bbf82b at vpanic+0x17b
#2 0xffffffff88bbeea3 at panic+0x43
#3 0xffffffff8108e911 at trap_fatal +0x391
#4 0xffffffff8108dd97 at trap+0x67
#5 0xffffffff81866c28 at calltrap+0x8
#6 0xffffffff88bf2be6 at sched_idletd+0x326
#7 0xffffffff88b8088e at fork_exit+0x7e
#8 0xffffffff81067c5e at fork_trampoline+0xe
Uptime: 19s

I have no idea what's happening. If it's okay, could you please provide some
guidance?

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