Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. 2019/07/20 02:49:38 parsed 1 programs 2019/07/20 02:49:38 executed programs: 0 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 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_output.c:337 cpuid = 1 time = 1563590978 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212ae530 vpanic() at vpanic+0x1e0/frame 0xfffffe00212ae590 panic() at panic+0x43/frame 0xfffffe00212ae5f0 __mtx_lock_flags() at __mtx_lock_flags+0x1fd/frame 0xfffffe00212ae650 tcp_output() at tcp_output+0x611/frame 0xfffffe00212ae800 tcp6_usr_connect() at tcp6_usr_connect+0x3b6/frame 0xfffffe00212ae870 soconnectat() at soconnectat+0x183/frame 0xfffffe00212ae8d0 kern_connectat() at kern_connectat+0x1ff/frame 0xfffffe00212ae930 sys_connect() at sys_connect+0xd9/frame 0xfffffe00212ae970 ia32_syscall() at ia32_syscall+0x46c/frame 0xfffffe00212aeab0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x81425ad KDB: enter: panic [ thread pid 787 tid 100117 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why