Autoloading module: intpm.ko Starting background file system checks in 60 seconds. Mon Jun 10 08:21 FreeBSD/amd64 (ci-freebsd-main-3.c.syzkaller.internal) (ttyu0) Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. 2019/06/10 08:37:23 parsed 1 programs 2019/06/10 08:37:23 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 2019/06/10 08:37:28 executed programs: 7 2019/06/10 08:37:34 executed programs: 14 interface if_tuntap.1 already present in the KLD 'kernel'! linker_load_file: /boot/kernel/if_tap.ko - unsupported file type 2019/06/10 08:37:40 executed programs: 21 2019/06/10 08:37:45 executed programs: 28 2019/06/10 08:37:51 executed programs: 35 2019/06/10 08:37:57 executed programs: 42 2019/06/10 08:38:02 executed programs: 49 2019/06/10 08:38:08 executed programs: 56 2019/06/10 08:38:13 executed programs: 63 2019/06/10 08:38:19 executed programs: 70 2019/06/10 08:38:25 executed programs: 77 2019/06/10 08:38:30 executed programs: 84 2019/06/10 08:38:36 executed programs: 91 2019/06/10 08:38:42 executed programs: 98 2019/06/10 08:38:47 executed programs: 105 2019/06/10 08:38:53 executed programs: 112 2019/06/10 08:38:59 executed programs: 119 2019/06/10 08:39:04 executed programs: 126 2019/06/10 08:39:10 executed programs: 133 2019/06/10 08:39:16 executed programs: 140 2019/06/10 08:39:21 executed programs: 147 2019/06/10 08:39:27 executed programs: 154 2019/06/10 08:39:32 executed programs: 161 2019/06/10 08:39:38 executed programs: 168 2019/06/10 08:39:44 executed programs: 175 2019/06/10 08:39:49 executed programs: 182 2019/06/10 08:39:55 executed programs: 189 2019/06/10 08:40:01 executed programs: 196 2019/06/10 08:40:06 executed programs: 203 2019/06/10 08:40:12 executed programs: 210 2019/06/10 08:40:17 executed programs: 217 2019/06/10 08:40:23 executed programs: 224 2019/06/10 08:40:29 executed programs: 231 2019/06/10 08:40:34 executed programs: 238 2019/06/10 08:40:40 executed programs: 245 2019/06/10 08:40:46 executed programs: 252 2019/06/10 08:40:51 executed programs: 259 2019/06/10 08:40:57 executed programs: 266 2019/06/10 08:41:02 executed programs: 273 2019/06/10 08:41:08 executed programs: 280 2019/06/10 08:41:14 executed programs: 287 2019/06/10 08:41:19 executed programs: 294 2019/06/10 08:41:25 executed programs: 301 2019/06/10 08:41:31 executed programs: 308 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/tcp_output.c:337 cpuid = 1 time = 1560156094 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0020ee5550 vpanic() at vpanic+0x1e0/frame 0xfffffe0020ee55b0 panic() at panic+0x43/frame 0xfffffe0020ee5610 __mtx_lock_flags() at __mtx_lock_flags+0x1fd/frame 0xfffffe0020ee5670 tcp_output() at tcp_output+0x5ee/frame 0xfffffe0020ee5830 tcp_usr_connect() at tcp_usr_connect+0x25c/frame 0xfffffe0020ee5880 soconnectat() at soconnectat+0x183/frame 0xfffffe0020ee58e0 kern_connectat() at kern_connectat+0x1ff/frame 0xfffffe0020ee5940 sys_connect() at sys_connect+0xd9/frame 0xfffffe0020ee5980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0020ee5ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0020ee5ab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x4131ba, rsp = 0x7fffdffdcf38, rbp = 0x3 --- KDB: enter: panic [ thread pid 1206 tid 101052 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why