[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.413433][ T27] audit: type=1800 audit(1584294725.187:25): pid=9333 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.446050][ T27] audit: type=1800 audit(1584294725.187:26): pid=9333 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.476952][ T27] audit: type=1800 audit(1584294725.187:27): pid=9333 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 '10.128.0.164' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 100.826456][ T9485] IPVS: ftp: loaded support on port[0] = 21 [ 100.880711][ T9495] ------------[ cut here ]------------ [ 100.886494][ T9495] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 100.895338][ T9495] WARNING: CPU: 0 PID: 9495 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 100.904879][ T9495] Kernel panic - not syncing: panic_on_warn set ... [ 100.911450][ T9495] CPU: 0 PID: 9495 Comm: syz-executor647 Not tainted 5.6.0-rc5-syzkaller #0 [ 100.920224][ T9495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.930387][ T9495] Call Trace: [ 100.933687][ T9495] dump_stack+0x188/0x20d [ 100.938018][ T9495] ? debug_print_object+0x80/0x250 [ 100.943124][ T9495] panic+0x2e3/0x75c [ 100.947040][ T9495] ? add_taint.cold+0x16/0x16 [ 100.951712][ T9495] ? __probe_kernel_read+0x188/0x1d0 [ 100.956976][ T9495] ? __warn.cold+0x14/0x35 [ 100.961388][ T9495] ? __warn+0xd5/0x1c8 [ 100.965454][ T9495] ? debug_print_object+0x160/0x250 [ 100.970641][ T9495] __warn.cold+0x2f/0x35 [ 100.974905][ T9495] ? debug_print_object+0x160/0x250 [ 100.980083][ T9495] report_bug+0x27b/0x2f0 [ 100.984402][ T9495] do_error_trap+0x12b/0x220 [ 100.988976][ T9495] ? debug_print_object+0x160/0x250 [ 100.994204][ T9495] do_invalid_op+0x32/0x40 [ 100.998600][ T9495] ? debug_print_object+0x160/0x250 [ 101.003781][ T9495] invalid_op+0x23/0x30 [ 101.007917][ T9495] RIP: 0010:debug_print_object+0x160/0x250 [ 101.013787][ T9495] Code: dd c0 fa 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 fa 51 88 48 c7 c7 20 f0 51 88 e8 a8 bd b1 fd <0f> 0b 83 05 0b ce d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 101.033378][ T9495] RSP: 0018:ffffc90002137178 EFLAGS: 00010282 [ 101.039433][ T9495] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 101.047432][ T9495] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff52000426e21 [ 101.055403][ T9495] RBP: 0000000000000001 R08: ffff8880a477e300 R09: ffffed1015cc45c9 [ 101.063375][ T9495] R10: ffffed1015cc45c8 R11: ffff8880ae622e43 R12: ffffffff897acba0 [ 101.071329][ T9495] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000426e3c [ 101.079296][ T9495] ? vprintk_func+0x81/0x17e [ 101.083883][ T9495] ? debug_print_object+0x160/0x250 [ 101.089060][ T9495] ? lockdep_hardirqs_on+0x417/0x5d0 [ 101.094759][ T9495] debug_object_activate+0x346/0x470 [ 101.100723][ T9495] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 101.106534][ T9495] ? debug_object_init_on_stack+0x20/0x20 [ 101.112244][ T9495] ? find_held_lock+0x2d/0x110 [ 101.117004][ T9495] ? free_object+0x70/0x70 [ 101.121417][ T9495] ? lock_downgrade+0x7f0/0x7f0 [ 101.126607][ T9495] ? delayed_work_timer_fn+0x90/0x90 [ 101.131870][ T9495] call_rcu+0x2c/0x690 [ 101.136113][ T9495] queue_rcu_work+0x82/0xa0 [ 101.140606][ T9495] route4_change+0x19e8/0x2250 [ 101.145352][ T9495] ? route4_destroy+0x800/0x800 [ 101.150199][ T9495] ? wait_for_completion+0x3c0/0x3c0 [ 101.155559][ T9495] tc_new_tfilter+0xa59/0x20b0 [ 101.160314][ T9495] ? route4_destroy+0x800/0x800 [ 101.165159][ T9495] ? tc_del_tfilter+0x1430/0x1430 [ 101.170169][ T9495] ? __lock_acquire+0x80b/0x3ca0 [ 101.175090][ T9495] ? apparmor_capable+0x454/0x8a0 [ 101.180098][ T9495] ? rcu_read_lock_held+0x9c/0xb0 [ 101.185104][ T9495] ? tc_del_tfilter+0x1430/0x1430 [ 101.190119][ T9495] rtnetlink_rcv_msg+0x810/0xad0 [ 101.195049][ T9495] ? rtnl_bridge_getlink+0x870/0x870 [ 101.200320][ T9495] ? mark_held_locks+0xe0/0xe0 [ 101.205063][ T9495] ? netlink_deliver_tap+0x146/0xb50 [ 101.210334][ T9495] netlink_rcv_skb+0x15a/0x410 [ 101.215082][ T9495] ? rtnl_bridge_getlink+0x870/0x870 [ 101.220346][ T9495] ? netlink_ack+0xa80/0xa80 [ 101.225030][ T9495] netlink_unicast+0x537/0x740 [ 101.229782][ T9495] ? netlink_attachskb+0x810/0x810 [ 101.234879][ T9495] ? _copy_from_iter_full+0x25c/0x870 [ 101.240239][ T9495] ? __phys_addr_symbol+0x2c/0x70 [ 101.245241][ T9495] ? __check_object_size+0x171/0x437 [ 101.250506][ T9495] netlink_sendmsg+0x882/0xe10 [ 101.255254][ T9495] ? aa_af_perm+0x260/0x260 [ 101.259782][ T9495] ? netlink_unicast+0x740/0x740 [ 101.264701][ T9495] ? netlink_unicast+0x740/0x740 [ 101.269619][ T9495] sock_sendmsg+0xcf/0x120 [ 101.274014][ T9495] ____sys_sendmsg+0x6b9/0x7d0 [ 101.278758][ T9495] ? kernel_sendmsg+0x50/0x50 [ 101.283422][ T9495] ___sys_sendmsg+0x100/0x170 [ 101.288126][ T9495] ? sendmsg_copy_msghdr+0x70/0x70 [ 101.293220][ T9495] ? __fget_files+0x329/0x4f0 [ 101.297898][ T9495] ? ksys_dup3+0x3c0/0x3c0 [ 101.302300][ T9495] ? __fget_light+0x208/0x270 [ 101.306959][ T9495] __sys_sendmsg+0xec/0x1b0 [ 101.311448][ T9495] ? __sys_sendmsg_sock+0xb0/0xb0 [ 101.316512][ T9495] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 101.322472][ T9495] ? __x64_sys_futex+0x380/0x4f0 [ 101.327397][ T9495] ? trace_hardirqs_off_caller+0x55/0x230 [ 101.333116][ T9495] ? do_syscall_64+0x21/0x7d0 [ 101.337790][ T9495] do_syscall_64+0xf6/0x7d0 [ 101.342292][ T9495] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.348203][ T9495] RIP: 0033:0x4472a9 [ 101.352077][ T9495] Code: e8 2c bb 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 101.371715][ T9495] RSP: 002b:00007efd68d0dd98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 101.380195][ T9495] RAX: ffffffffffffffda RBX: 00000000006dcc78 RCX: 00000000004472a9 [ 101.388148][ T9495] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 101.396106][ T9495] RBP: 00000000006dcc70 R08: 0000000000000000 R09: 0000000000000000 [ 101.404071][ T9495] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc7c [ 101.412023][ T9495] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 101.421361][ T9495] Kernel Offset: disabled [ 101.425736][ T9495] Rebooting in 86400 seconds..