Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x0
fault code		= supervisor write data, page not present
instruction pointer	= 0x20:0xffffffff81165262
stack pointer	        = 0x0:0xfffffe00245025e0
frame pointer	        = 0x0:0xfffffe00245026b0
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		= 4628 (syz-executor.1)
trap number		= 12
panic: page fault
cpuid = 0
time = 1569916939
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024502230
vpanic() at vpanic+0x1e0/frame 0xfffffe0024502290
panic() at panic+0x43/frame 0xfffffe00245022f0
trap_fatal() at trap_fatal+0x4de/frame 0xfffffe0024502370
trap_pfault() at trap_pfault+0xdc/frame 0xfffffe00245023f0
trap() at trap+0x44f/frame 0xfffffe0024502510
calltrap() at calltrap+0x8/frame 0xfffffe0024502510
--- trap 0xc, rip = 0xffffffff81165262, rsp = 0xfffffe00245025e0, rbp = 0xfffffe00245026b0 ---
uipc_send() at uipc_send+0x6d2/frame 0xfffffe00245026b0
sosend_generic() at sosend_generic+0x747/frame 0xfffffe0024502770
sosend() at sosend+0xc6/frame 0xfffffe00245027e0
kern_sendit() at kern_sendit+0x33d/frame 0xfffffe0024502890
freebsd32_sendmsg() at freebsd32_sendmsg+0x268/frame 0xfffffe0024502970
ia32_syscall() at ia32_syscall+0x46a/frame 0xfffffe0024502ab0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142fef
KDB: enter: panic
[ thread pid 4628 tid 100345 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why