Autoloading module: intpm.ko Starting background file system checks in 60 seconds. Fri Mar 15 14:44 FreeBSD/amd64 (ci-freebsd-main-5.c.syzkaller.internal) (ttyu0) Warning: Permanently added '10.128.0.196' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program login: Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x18 fault code = supervisor read data , page not present instruction pointer = 0x20:0xffffffff812beb87 stack pointer = 0x28:0xfffffe0016abb8c0 frame pointer = 0x28:0xfffffe0016abb900 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 = 0 (softirq_0) trap number = 12 panic: page fault cpuid = 0 time = 1552661135 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016abb520 vpanic() at vpanic+0x1e0/frame 0xfffffe0016abb580 panic() at panic+0x43/frame 0xfffffe0016abb5e0 trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe0016abb660 trap_pfault() at trap_pfault+0x9f/frame 0xfffffe0016abb6d0 trap() at trap+0x44d/frame 0xfffffe0016abb7f0 calltrap() at calltrap+0x8/frame 0xfffffe0016abb7f0 --- trap 0xc, rip = 0xffffffff812beb87, rsp = 0xfffffe0016abb8c0, rbp = 0xfffffe0016abb900 --- inp_freemoptions() at inp_freemoptions+0x177/frame 0xfffffe0016abb900 in_pcbfree_deferred() at in_pcbfree_deferred+0x224/frame 0xfffffe0016abb960 epoch_call_task() at epoch_call_task+0x262/frame 0xfffffe0016abb9c0 gtaskqueue_run_locked() at gtaskqueue_run_locked+0x13e/frame 0xfffffe0016abba20 gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xdd/frame 0xfffffe0016abba60 fork_exit() at fork_exit+0xb0/frame 0xfffffe0016abbab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016abbab0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 0 tid 100012 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why