Fatal trap 18: integer divide fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff80fd5f90 stack pointer = 0x28:0xfffffe001f8e0850 frame pointer = 0x28:0xfffffe001f8e08f0 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 = 30814 (syz-executor.0) trap number = 18 panic: integer divide fault cpuid = 0 time = 1566226220 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f8e0520 vpanic() at vpanic+0x1e0/frame 0xfffffe001f8e0580 panic() at panic+0x43/frame 0xfffffe001f8e05e0 trap_fatal() at trap_fatal+0x4de/frame 0xfffffe001f8e0660 trap() at trap+0xba/frame 0xfffffe001f8e0780 calltrap() at calltrap+0x8/frame 0xfffffe001f8e0780 --- trap 0x12, rip = 0xffffffff80fd5f90, rsp = 0xfffffe001f8e0850, rbp = 0xfffffe001f8e08f0 --- kern_fcntl() at kern_fcntl+0xa30/frame 0xfffffe001f8e08f0 kern_fcntl_freebsd() at kern_fcntl_freebsd+0x14f/frame 0xfffffe001f8e0980 amd64_syscall() at amd64_syscall+0x479/frame 0xfffffe001f8e0ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001f8e0ab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x41328a, rsp = 0x7fffdfffdf38, rbp = 0x3 --- KDB: enter: panic [ thread pid 30814 tid 100945 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why