[Bug 268971] panic: main-n260091-06b93ef8cda2 panicked (Fatal trap 12: page fault while in kernel mode)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268971

            Bug ID: 268971
           Summary: panic: main-n260091-06b93ef8cda2 panicked (Fatal trap
                    12: page fault while in kernel mode)
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: ish@amail.plala.or.jp

Created attachment 239485
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=239485&action=edit
textdump.tar.last

Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 06
fault virtual address   = 0x1ac
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff80ce4f1c
stack pointer           = 0x28:0xfffffe00edb17cd0
frame pointer           = 0x28:0xfffffe00edb17cd0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1782 (nfsd: master)
rdi:                0 rsi:                0 rdx:                0
rcx: fffffe0093c7c380  r8:               80  r9:            10000
rax:         ffffffff rbx: fffffe00edb181a8 rbp: fffffe00edb17cd0
r10:                1 r11:            10000 r12: fffffe00edb17f78
r13:                0 r14:                1 r15: fffffe00edb17fd0
trap number             = 12
panic: page fault
cpuid = 3
time = 1673789502
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00edb17a90
vpanic() at vpanic+0x151/frame 0xfffffe00edb17ae0
panic() at panic+0x43/frame 0xfffffe00edb17b40
trap_fatal() at trap_fatal+0x409/frame 0xfffffe00edb17ba0
trap_pfault() at trap_pfault+0xab/frame 0xfffffe00edb17c00
calltrap() at calltrap+0x8/frame 0xfffffe00edb17c00
--- trap 0xc, rip = 0xffffffff80ce4f1c, rsp = 0xfffffe00edb17cd0, rbp =
0xfffffe00edb17cd0 ---
vrele() at vrele+0xc/frame 0xfffffe00edb17cd0
nfsvno_open() at nfsvno_open+0x1d1/frame 0xfffffe00edb17d60
nfsrvd_open() at nfsrvd_open+0xe84/frame 0xfffffe00edb181f0
nfsrvd_dorpc() at nfsrvd_dorpc+0x1386/frame 0xfffffe00edb18400
nfssvc_program() at nfssvc_program+0x5e2/frame 0xfffffe00edb185e0
svc_run_internal() at svc_run_internal+0xa42/frame 0xfffffe00edb18710
svc_run() at svc_run+0x250/frame 0xfffffe00edb18770
nfsrvd_nfsd() at nfsrvd_nfsd+0x338/frame 0xfffffe00edb188d0
nfssvc_nfsd() at nfssvc_nfsd+0x524/frame 0xfffffe00edb18de0
sys_nfssvc() at sys_nfssvc+0xb0/frame 0xfffffe00edb18e00
amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe00edb18f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe00edb18f30
--- syscall (155, FreeBSD ELF64, nfssvc), rip = 0x20bd03ff250a, rsp =
0x20bd0230b868, rbp = 0x20bd0230bb00 ---
KDB: enter: panic

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