Autoloading module: intpm.ko Starting background file system checks in 60 seconds. Sun Jun 9 21:29 FreeBSD/amd64 (ci-freebsd-main-4.c.syzkaller.internal) (ttyu0) Warning: Permanently added '10.128.0.98' (ECDSA) to the list of known hosts. 2019/06/09 21:30:46 parsed 1 programs 2019/06/09 21:30:46 executed programs: 0 login: interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x418 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff810532e8 stack pointer = 0x28:0xfffffe001f6e5650 frame pointer = 0x28:0xfffffe001f6e5700 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 = 901 (syz-executor.0) trap number = 12 panic: page fault cpuid = 1 time = 1560115846 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f6e52b0 vpanic() at vpanic+0x1e0/frame 0xfffffe001f6e5310 panic() at panic+0x43/frame 0xfffffe001f6e5370 trap_fatal() at trap_fatal+0x4de/frame 0xfffffe001f6e53f0 trap_pfault() at trap_pfault+0x9f/frame 0xfffffe001f6e5460 trap() at trap+0x44d/frame 0xfffffe001f6e5580 calltrap() at calltrap+0x8/frame 0xfffffe001f6e5580 --- trap 0xc, rip = 0xffffffff810532e8, rsp = 0xfffffe001f6e5650, rbp = 0xfffffe001f6e5700 --- _sx_xlock_hard() at _sx_xlock_hard+0x2f8/frame 0xfffffe001f6e5700 _sx_xlock() at _sx_xlock+0x136/frame 0xfffffe001f6e5750 soreceive_generic() at soreceive_generic+0x1a2/frame 0xfffffe001f6e5810 soreceive() at soreceive+0xb9/frame 0xfffffe001f6e5870 dofileread() at dofileread+0xd3/frame 0xfffffe001f6e58d0 kern_readv() at kern_readv+0x66/frame 0xfffffe001f6e5910 sys_read() at sys_read+0xd2/frame 0xfffffe001f6e5980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001f6e5ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001f6e5ab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x4131ba, rsp = 0x7fffdfffdf38, rbp = 0x3 --- KDB: enter: panic [ thread pid 901 tid 100238 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why