[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.419094][ T27] audit: type=1800 audit(1584668096.494:25): pid=9337 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.446258][ T27] audit: type=1800 audit(1584668096.494:26): pid=9337 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.486436][ T27] audit: type=1800 audit(1584668096.494:27): pid=9337 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.174' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.293743][ T9490] IPVS: ftp: loaded support on port[0] = 21 [ 76.328986][ T9493] ------------[ cut here ]------------ [ 76.334554][ T9493] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 76.343517][ T9493] WARNING: CPU: 1 PID: 9493 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.353246][ T9493] Kernel panic - not syncing: panic_on_warn set ... [ 76.359815][ T9493] CPU: 1 PID: 9493 Comm: syz-executor360 Not tainted 5.6.0-rc5-syzkaller #0 [ 76.368464][ T9493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.378514][ T9493] Call Trace: [ 76.381790][ T9493] dump_stack+0x188/0x20d [ 76.386105][ T9493] ? debug_print_object+0x80/0x250 [ 76.391199][ T9493] panic+0x2e3/0x75c [ 76.395125][ T9493] ? add_taint.cold+0x16/0x16 [ 76.399787][ T9493] ? __probe_kernel_read+0x188/0x1d0 [ 76.405052][ T9493] ? __warn.cold+0x14/0x35 [ 76.409447][ T9493] ? __warn+0xd5/0x1c8 [ 76.413505][ T9493] ? debug_print_object+0x160/0x250 [ 76.418691][ T9493] __warn.cold+0x2f/0x35 [ 76.422915][ T9493] ? debug_print_object+0x160/0x250 [ 76.428095][ T9493] report_bug+0x27b/0x2f0 [ 76.432408][ T9493] do_error_trap+0x12b/0x220 [ 76.436985][ T9493] ? debug_print_object+0x160/0x250 [ 76.442175][ T9493] do_invalid_op+0x32/0x40 [ 76.446598][ T9493] ? debug_print_object+0x160/0x250 [ 76.451785][ T9493] invalid_op+0x23/0x30 [ 76.455922][ T9493] RIP: 0010:debug_print_object+0x160/0x250 [ 76.461709][ T9493] Code: dd c0 fa 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 fa 71 88 48 c7 c7 20 f0 71 88 e8 a8 bd b1 fd <0f> 0b 83 05 0b df f3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 76.481294][ T9493] RSP: 0018:ffffc900020df178 EFLAGS: 00010282 [ 76.487342][ T9493] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 76.495294][ T9493] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200041be21 [ 76.503243][ T9493] RBP: 0000000000000001 R08: ffff88809c6e4640 R09: fffffbfff1851178 [ 76.511194][ T9493] R10: fffffbfff1851177 R11: ffffffff8c288bbf R12: ffffffff899acba0 [ 76.519145][ T9493] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200041be3c [ 76.527127][ T9493] ? vprintk_func+0x81/0x17e [ 76.531703][ T9493] ? debug_print_object+0x160/0x250 [ 76.536884][ T9493] ? lockdep_hardirqs_on+0x417/0x5d0 [ 76.542153][ T9493] debug_object_activate+0x346/0x470 [ 76.547448][ T9493] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 76.553247][ T9493] ? debug_object_init_on_stack+0x20/0x20 [ 76.559059][ T9493] ? find_held_lock+0x2d/0x110 [ 76.563808][ T9493] ? free_object+0x70/0x70 [ 76.568207][ T9493] ? lock_downgrade+0x7f0/0x7f0 [ 76.573043][ T9493] ? delayed_work_timer_fn+0x90/0x90 [ 76.578317][ T9493] call_rcu+0x2c/0x690 [ 76.582416][ T9493] queue_rcu_work+0x82/0xa0 [ 76.586911][ T9493] route4_change+0x19e8/0x2250 [ 76.591662][ T9493] ? route4_destroy+0x800/0x800 [ 76.596503][ T9493] ? wait_for_completion+0x3c0/0x3c0 [ 76.601768][ T9493] tc_new_tfilter+0xa59/0x20b0 [ 76.606527][ T9493] ? route4_destroy+0x800/0x800 [ 76.611369][ T9493] ? tc_del_tfilter+0x1430/0x1430 [ 76.616374][ T9493] ? __lock_acquire+0x80b/0x3ca0 [ 76.621296][ T9493] ? apparmor_capable+0x454/0x8a0 [ 76.626319][ T9493] ? rcu_read_lock_held+0x9c/0xb0 [ 76.631349][ T9493] ? tc_del_tfilter+0x1430/0x1430 [ 76.636370][ T9493] rtnetlink_rcv_msg+0x810/0xad0 [ 76.641288][ T9493] ? rtnl_bridge_getlink+0x870/0x870 [ 76.646555][ T9493] ? mark_held_locks+0xe0/0xe0 [ 76.651304][ T9493] ? netlink_deliver_tap+0x146/0xb50 [ 76.656582][ T9493] netlink_rcv_skb+0x15a/0x410 [ 76.661328][ T9493] ? rtnl_bridge_getlink+0x870/0x870 [ 76.666617][ T9493] ? netlink_ack+0xa80/0xa80 [ 76.671193][ T9493] netlink_unicast+0x537/0x740 [ 76.675939][ T9493] ? netlink_attachskb+0x810/0x810 [ 76.681047][ T9493] ? _copy_from_iter_full+0x25c/0x870 [ 76.686398][ T9493] ? __phys_addr_symbol+0x2c/0x70 [ 76.691470][ T9493] ? __check_object_size+0x171/0x437 [ 76.696756][ T9493] netlink_sendmsg+0x882/0xe10 [ 76.701515][ T9493] ? aa_af_perm+0x260/0x260 [ 76.705997][ T9493] ? netlink_unicast+0x740/0x740 [ 76.710923][ T9493] ? netlink_unicast+0x740/0x740 [ 76.715846][ T9493] sock_sendmsg+0xcf/0x120 [ 76.720246][ T9493] ____sys_sendmsg+0x6b9/0x7d0 [ 76.724991][ T9493] ? kernel_sendmsg+0x50/0x50 [ 76.730359][ T9493] ___sys_sendmsg+0x100/0x170 [ 76.735017][ T9493] ? sendmsg_copy_msghdr+0x70/0x70 [ 76.740810][ T9493] ? __fget_files+0x329/0x4f0 [ 76.745468][ T9493] ? ksys_dup3+0x3c0/0x3c0 [ 76.749868][ T9493] ? __fget_light+0x208/0x270 [ 76.754530][ T9493] __sys_sendmsg+0xec/0x1b0 [ 76.759020][ T9493] ? __sys_sendmsg_sock+0xb0/0xb0 [ 76.764026][ T9493] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 76.770029][ T9493] ? __x64_sys_futex+0x380/0x4f0 [ 76.774958][ T9493] ? trace_hardirqs_off_caller+0x55/0x230 [ 76.780681][ T9493] ? do_syscall_64+0x21/0x7d0 [ 76.785358][ T9493] do_syscall_64+0xf6/0x7d0 [ 76.789896][ T9493] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.795772][ T9493] RIP: 0033:0x446e09 [ 76.799699][ T9493] Code: e8 bc b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.819295][ T9493] RSP: 002b:00007f43297a6d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 76.827703][ T9493] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 76.835655][ T9493] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 76.843605][ T9493] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 76.851560][ T9493] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 76.859589][ T9493] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 76.868832][ T9493] Kernel Offset: disabled [ 76.873219][ T9493] Rebooting in 86400 seconds..