[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 83.896484][ T27] audit: type=1800 audit(1584384195.314:25): pid=9408 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.916488][ T27] audit: type=1800 audit(1584384195.324:26): pid=9408 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.938839][ T27] audit: type=1800 audit(1584384195.324:27): pid=9408 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 93.322652][ T9560] IPVS: ftp: loaded support on port[0] = 21 [ 93.369269][ T9567] ------------[ cut here ]------------ [ 93.375048][ T9567] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 93.384017][ T9567] WARNING: CPU: 1 PID: 9567 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 93.393651][ T9567] Kernel panic - not syncing: panic_on_warn set ... [ 93.400382][ T9567] CPU: 1 PID: 9567 Comm: syz-executor264 Not tainted 5.6.0-rc6-syzkaller #0 [ 93.409036][ T9567] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.419080][ T9567] Call Trace: [ 93.422362][ T9567] dump_stack+0x188/0x20d [ 93.426696][ T9567] ? debug_print_object+0x120/0x250 [ 93.431889][ T9567] panic+0x2e3/0x75c [ 93.435786][ T9567] ? add_taint.cold+0x16/0x16 [ 93.440463][ T9567] ? __probe_kernel_read+0x188/0x1d0 [ 93.445731][ T9567] ? __warn.cold+0x14/0x35 [ 93.450145][ T9567] ? __warn+0xd5/0x1c8 [ 93.454205][ T9567] ? debug_print_object+0x160/0x250 [ 93.459413][ T9567] __warn.cold+0x2f/0x35 [ 93.463658][ T9567] ? debug_print_object+0x160/0x250 [ 93.468840][ T9567] report_bug+0x27b/0x2f0 [ 93.473170][ T9567] do_error_trap+0x12b/0x220 [ 93.477742][ T9567] ? debug_print_object+0x160/0x250 [ 93.482935][ T9567] do_invalid_op+0x32/0x40 [ 93.487347][ T9567] ? debug_print_object+0x160/0x250 [ 93.492579][ T9567] invalid_op+0x23/0x30 [ 93.496801][ T9567] RIP: 0010:debug_print_object+0x160/0x250 [ 93.502673][ T9567] Code: dd c0 f3 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 f3 51 88 48 c7 c7 20 e9 51 88 e8 d8 cc b1 fd <0f> 0b 83 05 ab 9a d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 93.522282][ T9567] RSP: 0018:ffffc90001de7168 EFLAGS: 00010286 [ 93.528355][ T9567] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 93.536461][ T9567] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff520003bce1f [ 93.544466][ T9567] RBP: 0000000000000001 R08: ffff8880a1faa600 R09: fffffbfff180e578 [ 93.552551][ T9567] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 93.560525][ T9567] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003bce3a [ 93.568598][ T9567] ? vprintk_func+0x81/0x17e [ 93.573179][ T9567] ? debug_print_object+0x160/0x250 [ 93.578359][ T9567] ? lockdep_hardirqs_on+0x417/0x5d0 [ 93.583643][ T9567] debug_object_activate+0x346/0x470 [ 93.588926][ T9567] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 93.594716][ T9567] ? debug_object_init_on_stack+0x20/0x20 [ 93.600432][ T9567] ? find_held_lock+0x2d/0x110 [ 93.605193][ T9567] ? free_object+0x70/0x70 [ 93.609605][ T9567] ? lock_downgrade+0x7f0/0x7f0 [ 93.614439][ T9567] ? delayed_work_timer_fn+0x90/0x90 [ 93.619721][ T9567] call_rcu+0x2c/0x690 [ 93.623808][ T9567] queue_rcu_work+0x82/0xa0 [ 93.628307][ T9567] route4_change+0x19e8/0x2250 [ 93.634193][ T9567] ? route4_destroy+0x800/0x800 [ 93.639047][ T9567] ? wait_for_completion+0x3c0/0x3c0 [ 93.644321][ T9567] tc_new_tfilter+0xa59/0x20b0 [ 93.649164][ T9567] ? route4_destroy+0x800/0x800 [ 93.654115][ T9567] ? tc_del_tfilter+0x1430/0x1430 [ 93.659150][ T9567] ? __lock_acquire+0x80b/0x3ca0 [ 93.664175][ T9567] ? apparmor_capable+0x454/0x8a0 [ 93.669238][ T9567] ? rcu_read_lock_held+0x9c/0xb0 [ 93.674379][ T9567] ? tc_del_tfilter+0x1430/0x1430 [ 93.679407][ T9567] rtnetlink_rcv_msg+0x810/0xad0 [ 93.684431][ T9567] ? rtnl_bridge_getlink+0x880/0x880 [ 93.689714][ T9567] ? mark_held_locks+0xe0/0xe0 [ 93.694479][ T9567] ? netlink_deliver_tap+0x146/0xb50 [ 93.699999][ T9567] netlink_rcv_skb+0x15a/0x410 [ 93.704770][ T9567] ? rtnl_bridge_getlink+0x880/0x880 [ 93.710244][ T9567] ? netlink_ack+0xa80/0xa80 [ 93.714841][ T9567] netlink_unicast+0x537/0x740 [ 93.719857][ T9567] ? netlink_attachskb+0x810/0x810 [ 93.725104][ T9567] ? _copy_from_iter_full+0x25c/0x870 [ 93.730493][ T9567] ? __phys_addr_symbol+0x2c/0x70 [ 93.735769][ T9567] ? __check_object_size+0x171/0x437 [ 93.741321][ T9567] netlink_sendmsg+0x882/0xe10 [ 93.746880][ T9567] ? aa_af_perm+0x260/0x260 [ 93.751476][ T9567] ? netlink_unicast+0x740/0x740 [ 93.756486][ T9567] ? netlink_unicast+0x740/0x740 [ 93.761442][ T9567] sock_sendmsg+0xcf/0x120 [ 93.765872][ T9567] ____sys_sendmsg+0x6b9/0x7d0 [ 93.770835][ T9567] ? kernel_sendmsg+0x50/0x50 [ 93.775687][ T9567] ___sys_sendmsg+0x100/0x170 [ 93.780386][ T9567] ? sendmsg_copy_msghdr+0x70/0x70 [ 93.785508][ T9567] ? __fget_files+0x329/0x4f0 [ 93.790175][ T9567] ? ksys_dup3+0x3c0/0x3c0 [ 93.794669][ T9567] ? __fget_light+0x208/0x270 [ 93.799341][ T9567] __sys_sendmsg+0xec/0x1b0 [ 93.803832][ T9567] ? __sys_sendmsg_sock+0xb0/0xb0 [ 93.808954][ T9567] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 93.814938][ T9567] ? __ia32_sys_futex_time32+0x32a/0x494 [ 93.820580][ T9567] ? fpregs_mark_activate+0x320/0x320 [ 93.825934][ T9567] ? trace_hardirqs_off_caller+0x55/0x230 [ 93.831637][ T9567] ? do_fast_syscall_32+0xcc/0xe8f [ 93.836746][ T9567] do_fast_syscall_32+0x270/0xe8f [ 93.841783][ T9567] entry_SYSENTER_compat+0x70/0x7f [ 93.848397][ T9567] Kernel Offset: disabled [ 93.852796][ T9567] Rebooting in 86400 seconds..