Fatal trap NUM: page fault while in kernel mode

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: f766826fe3b8 amd64: Remove proc0_tf, the bootstrap trapframe
git tree: https://github.com/freebsd/freebsd-src.git main
console output: https://syzkaller.appspot.com/x/log.txt?x=1545cad1300000
dashboard link: https://syzkaller.appspot.com/bug?extid=a0b62c6107b34a04e54d

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a0b62c...@syzkaller.appspotmail.com

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0xffffffffffffffff
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff849f6c92
stack pointer = 0x28:0xfffffe00577dfd40
frame pointer = 0x28:0xfffffe00577dfd70
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 = 1034 (syz-executor.3)

trap number = 12


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