Fatal trap 9: general protection fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff81163cf5 stack pointer = 0x28:0xfffffe001fa0e610 frame pointer = 0x28:0xfffffe001fa0e650 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 = 907 (syz-executor9083768) trap number = 9 panic: general protection fault cpuid = 0 time = 1552881695 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001fa0e2e0 vpanic() at vpanic+0x1e0/frame 0xfffffe001fa0e340 panic() at panic+0x43/frame 0xfffffe001fa0e3a0 trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe001fa0e420 trap() at trap+0xba/frame 0xfffffe001fa0e540 calltrap() at calltrap+0x8/frame 0xfffffe001fa0e540 --- trap 0x9, rip = 0xffffffff81163cf5, rsp = 0xfffffe001fa0e610, rbp = 0xfffffe001fa0e650 --- unp_dispose() at unp_dispose+0xa5/frame 0xfffffe001fa0e650 sofree() at sofree+0x42c/frame 0xfffffe001fa0e6b0 soclose() at soclose+0x5b3/frame 0xfffffe001fa0e730 _fdrop() at _fdrop+0x3a/frame 0xfffffe001fa0e760 closef() at closef+0x27d/frame 0xfffffe001fa0e7f0 fdescfree_fds() at fdescfree_fds+0xbd/frame 0xfffffe001fa0e840 fdescfree() at fdescfree+0x58a/frame 0xfffffe001fa0e900 exit1() at exit1+0x780/frame 0xfffffe001fa0e970 sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe001fa0e980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001fa0eab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001fa0eab0 --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x447a0a, rsp = 0x7fffffffea68, rbp = 0x7fffffffea80 --- KDB: enter: panic [ thread pid 907 tid 100096 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why db>