Autoloading module: intpm.ko Starting background file system checks in 60 seconds. Wed Aug 7 05:41 FreeBSD/amd64 (ci-freebsd-main-0.c.syzkaller.internal) (ttyu0) Warning: Permanently added '10.128.0.232' (ECDSA) to the list of known hosts. 2019/08/07 05:43:18 parsed 1 programs 2019/08/07 05:43:18 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 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 2019/08/07 05:43:23 executed programs: 415 2019/08/07 05:43:29 executed programs: 826 interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type 2019/08/07 05:43:34 executed programs: 1238 2019/08/07 05:43:39 executed programs: 1650 Expensive timeout(9) function: 0xffffffff810dc690(0xfffff8000cb48000) 0.002139936 s 2019/08/07 05:43:44 executed programs: 2065 2019/08/07 05:43:50 executed programs: 2480 2019/08/07 05:43:55 executed programs: 2892 2019/08/07 05:44:00 executed programs: 3305 2019/08/07 05:44:05 executed programs: 3717 2019/08/07 05:44:11 executed programs: 4128 2019/08/07 05:44:16 executed programs: 4539 2019/08/07 05:44:21 executed programs: 4952 2019/08/07 05:44:27 executed programs: 5366 2019/08/07 05:44:32 executed programs: 5780 2019/08/07 05:44:37 executed programs: 6192 2019/08/07 05:44:42 executed programs: 6605 2019/08/07 05:44:47 executed programs: 7017 2019/08/07 05:44:53 executed programs: 7432 2019/08/07 05:44:58 executed programs: 7845 2019/08/07 05:45:03 executed programs: 8257 2019/08/07 05:45:08 executed programs: 8670 2019/08/07 05:45:14 executed programs: 9083 2019/08/07 05:45:19 executed programs: 9498 2019/08/07 05:45:24 executed programs: 9911 2019/08/07 05:45:30 executed programs: 10325 2019/08/07 05:45:35 executed programs: 10737 2019/08/07 05:45:40 executed programs: 11148 Expensive timeout(9) function: 0xffffffff810dc690(0xfffff80004d4d000) 0.005741511 s 2019/08/07 05:45:45 executed programs: 11560 2019/08/07 05:45:50 executed programs: 11973 2019/08/07 05:45:56 executed programs: 12384 2019/08/07 05:46:01 executed programs: 12796 2019/08/07 05:46:06 executed programs: 13209 2019/08/07 05:46:12 executed programs: 13622 2019/08/07 05:46:17 executed programs: 14033 2019/08/07 05:46:22 executed programs: 14445 2019/08/07 05:46:27 executed programs: 14857 2019/08/07 05:46:33 executed programs: 15270 2019/08/07 05:46:38 executed programs: 15682 2019/08/07 05:46:43 executed programs: 16095 2019/08/07 05:46:48 executed programs: 16508 2019/08/07 05:46:54 executed programs: 16922 2019/08/07 05:46:59 executed programs: 17332 2019/08/07 05:47:04 executed programs: 17744 2019/08/07 05:47:09 executed programs: 18157 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/tcp_output.c:337 cpuid = 1 time = 1565156830 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f926530 vpanic() at vpanic+0x1e0/frame 0xfffffe001f926590 panic() at panic+0x43/frame 0xfffffe001f9265f0 __mtx_lock_flags() at __mtx_lock_flags+0x1fd/frame 0xfffffe001f926650 tcp_output() at tcp_output+0x611/frame 0xfffffe001f926810 tcp6_usr_connect() at tcp6_usr_connect+0x3b6/frame 0xfffffe001f926880 soconnectat() at soconnectat+0x183/frame 0xfffffe001f9268e0 kern_connectat() at kern_connectat+0x209/frame 0xfffffe001f926940 sys_connect() at sys_connect+0xd9/frame 0xfffffe001f926980 amd64_syscall() at amd64_syscall+0x479/frame 0xfffffe001f926ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001f926ab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x41328a, rsp = 0x7fffdfffdf38, rbp = 0x3 --- KDB: enter: panic [ thread pid 19191 tid 100338 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why