[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.533056][ T27] audit: type=1800 audit(1584349723.668:25): pid=9352 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.553131][ T27] audit: type=1800 audit(1584349723.668:26): pid=9352 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.609076][ T27] audit: type=1800 audit(1584349723.668:27): pid=9352 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 '10.128.10.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.444170][ T9505] IPVS: ftp: loaded support on port[0] = 21 [ 74.482942][ T9508] ------------[ cut here ]------------ [ 74.488630][ T9508] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 74.497693][ T9508] WARNING: CPU: 0 PID: 9508 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 74.507409][ T9508] Kernel panic - not syncing: panic_on_warn set ... [ 74.514000][ T9508] CPU: 0 PID: 9508 Comm: syz-executor735 Not tainted 5.6.0-rc5-syzkaller #0 [ 74.522673][ T9508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.532730][ T9508] Call Trace: [ 74.536042][ T9508] dump_stack+0x188/0x20d [ 74.540508][ T9508] ? debug_print_object+0x80/0x250 [ 74.545636][ T9508] panic+0x2e3/0x75c [ 74.549542][ T9508] ? add_taint.cold+0x16/0x16 [ 74.554226][ T9508] ? __probe_kernel_read+0x188/0x1d0 [ 74.559511][ T9508] ? __warn.cold+0x14/0x35 [ 74.563941][ T9508] ? __warn+0xd5/0x1c8 [ 74.568022][ T9508] ? debug_print_object+0x160/0x250 [ 74.573230][ T9508] __warn.cold+0x2f/0x35 [ 74.577483][ T9508] ? debug_print_object+0x160/0x250 [ 74.582781][ T9508] report_bug+0x27b/0x2f0 [ 74.587301][ T9508] do_error_trap+0x12b/0x220 [ 74.591901][ T9508] ? debug_print_object+0x160/0x250 [ 74.597117][ T9508] do_invalid_op+0x32/0x40 [ 74.601540][ T9508] ? debug_print_object+0x160/0x250 [ 74.606753][ T9508] invalid_op+0x23/0x30 [ 74.610924][ T9508] RIP: 0010:debug_print_object+0x160/0x250 [ 74.616736][ T9508] Code: dd 40 f4 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 40 f4 51 88 48 c7 c7 a0 e9 51 88 e8 38 d4 b1 fd <0f> 0b 83 05 0b b3 d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 74.636363][ T9508] RSP: 0018:ffffc90002147178 EFLAGS: 00010282 [ 74.642616][ T9508] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 74.650589][ T9508] RDX: 0000000000000000 RSI: ffffffff815bf511 RDI: fffff52000428e21 [ 74.658568][ T9508] RBP: 0000000000000001 R08: ffff888097bc0380 R09: fffffbfff180e578 [ 74.666694][ T9508] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 74.674665][ T9508] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000428e3c [ 74.682733][ T9508] ? vprintk_func+0x81/0x17e [ 74.687463][ T9508] ? debug_print_object+0x160/0x250 [ 74.692793][ T9508] ? lockdep_hardirqs_on+0x417/0x5d0 [ 74.698229][ T9508] debug_object_activate+0x346/0x470 [ 74.703629][ T9508] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 74.709427][ T9508] ? debug_object_init_on_stack+0x20/0x20 [ 74.715169][ T9508] ? find_held_lock+0x2d/0x110 [ 74.719930][ T9508] ? free_object+0x70/0x70 [ 74.724336][ T9508] ? lock_downgrade+0x7f0/0x7f0 [ 74.729183][ T9508] ? delayed_work_timer_fn+0x90/0x90 [ 74.734461][ T9508] call_rcu+0x2c/0x690 [ 74.738668][ T9508] queue_rcu_work+0x82/0xa0 [ 74.743180][ T9508] route4_change+0x19e8/0x2250 [ 74.747949][ T9508] ? route4_destroy+0x800/0x800 [ 74.752804][ T9508] ? wait_for_completion+0x3c0/0x3c0 [ 74.758100][ T9508] tc_new_tfilter+0xa59/0x20b0 [ 74.762863][ T9508] ? route4_destroy+0x800/0x800 [ 74.767709][ T9508] ? tc_del_tfilter+0x1430/0x1430 [ 74.772724][ T9508] ? __lock_acquire+0x80b/0x3ca0 [ 74.777654][ T9508] ? apparmor_capable+0x454/0x8a0 [ 74.782676][ T9508] ? rcu_read_lock_held+0x9c/0xb0 [ 74.787693][ T9508] ? tc_del_tfilter+0x1430/0x1430 [ 74.792836][ T9508] rtnetlink_rcv_msg+0x810/0xad0 [ 74.797768][ T9508] ? rtnl_bridge_getlink+0x880/0x880 [ 74.803051][ T9508] ? mark_held_locks+0xe0/0xe0 [ 74.807812][ T9508] ? netlink_deliver_tap+0x146/0xb50 [ 74.813103][ T9508] netlink_rcv_skb+0x15a/0x410 [ 74.817876][ T9508] ? rtnl_bridge_getlink+0x880/0x880 [ 74.823236][ T9508] ? netlink_ack+0xa80/0xa80 [ 74.827837][ T9508] netlink_unicast+0x537/0x740 [ 74.832691][ T9508] ? netlink_attachskb+0x810/0x810 [ 74.837918][ T9508] ? _copy_from_iter_full+0x25c/0x870 [ 74.843587][ T9508] ? __phys_addr_symbol+0x2c/0x70 [ 74.848604][ T9508] ? __check_object_size+0x171/0x437 [ 74.853884][ T9508] netlink_sendmsg+0x882/0xe10 [ 74.858790][ T9508] ? aa_af_perm+0x260/0x260 [ 74.863285][ T9508] ? netlink_unicast+0x740/0x740 [ 74.868218][ T9508] ? netlink_unicast+0x740/0x740 [ 74.873144][ T9508] sock_sendmsg+0xcf/0x120 [ 74.877550][ T9508] ____sys_sendmsg+0x6b9/0x7d0 [ 74.882374][ T9508] ? kernel_sendmsg+0x50/0x50 [ 74.887060][ T9508] ___sys_sendmsg+0x100/0x170 [ 74.891727][ T9508] ? sendmsg_copy_msghdr+0x70/0x70 [ 74.896848][ T9508] ? __fget_files+0x329/0x4f0 [ 74.901588][ T9508] ? ksys_dup3+0x3c0/0x3c0 [ 74.906004][ T9508] ? __fget_light+0x208/0x270 [ 74.910717][ T9508] __sys_sendmsg+0xec/0x1b0 [ 74.915286][ T9508] ? __sys_sendmsg_sock+0xb0/0xb0 [ 74.920307][ T9508] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 74.926349][ T9508] ? __x64_sys_futex+0x380/0x4f0 [ 74.931290][ T9508] ? trace_hardirqs_off_caller+0x55/0x230 [ 74.937087][ T9508] ? do_syscall_64+0x21/0x7d0 [ 74.941767][ T9508] do_syscall_64+0xf6/0x7d0 [ 74.946271][ T9508] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.952172][ T9508] RIP: 0033:0x4474d9 [ 74.956054][ T9508] Code: e8 0c 0a 03 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 8b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 74.975655][ T9508] RSP: 002b:00007f47fa303d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 74.984057][ T9508] RAX: ffffffffffffffda RBX: 00000000006dcc78 RCX: 00000000004474d9 [ 74.992149][ T9508] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 75.000151][ T9508] RBP: 00000000006dcc70 R08: 0000000000000000 R09: 0000000000000000 [ 75.008112][ T9508] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc7c [ 75.016079][ T9508] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 75.025520][ T9508] Kernel Offset: disabled [ 75.029939][ T9508] Rebooting in 86400 seconds..