syzbot

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address	= 0x8fe7f368
fault code		= supervisor write data, page not present
instruction pointer	= 0x20:0xffffffff817e9824
stack pointer	        = 0x28:0xfffffe008fd0c7a0
frame pointer	        = 0x28:0xfffffe008fd0c880
code segment		= base 0x0, limit 0xfffff, type 0x1b
executing program
executing program
executing program
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, 

FreeBSD/amd64resume, IOPL = 0
current process		= 8764 (syz-executor1137481)
trap number		= 12
panic: page fault
cpuid = 1
time = 1656113174
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe008fd0bf90
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe008fd0c0f0
vpanic() at vpanic+0x254/frame 0xfffffe008fd0c1d0
panic() at panic+0xb5/frame 0xfffffe008fd0c290
trap_fatal() at trap_fatal+0x6bd/frame 0xfffffe008fd0c3b0
trap_pfault() at trap_pfault+0x182/frame 0xfffffe008fd0c4f0
trap() at trap+0x5b3/frame 0xfffffe008fd0c6d0
calltrap() at calltrap+0x8/frame 0xfffffe008fd0c6d0
--- trap 0xc, rip = 0xffffffff817e9824, rsp = 0xfffffe008fd0c7a0, rbp = 0xfffffe008fd0c880 ---
soclose() at soclose+0x584/frame 0xfffffe008fd0c880
_fdrop() at _fdrop+0x58/frame 0xfffffe008fd0c8b0
closef() at closef+0x689/frame 0xfffffe008fd0ca90
fdescfree() at fdescfree+0xa84/frame 0xfffffe008fd0cc70
exit1() at exit1+0x915/frame 0xfffffe008fd0cd10
sys_exit() at sys_exit+0x28/frame 0xfffffe008fd0cd30
amd64_syscall() at amd64_syscall+0x410/frame 0xfffffe008fd0cf30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008fd0cf30
--- syscall (1, FreeBSD ELF64, sys_exit), rip = 0x29580a, rsp = 0x820ae64c8, rbp = 0x820ae64e0 ---
KDB: enter: panic
[ thread pid 8764 tid 100095 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x275e2ba(%rip)
db> set $lines = 0
db>