[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.649447][ T27] audit: type=1800 audit(1584422836.021:25): pid=9375 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.674084][ T27] audit: type=1800 audit(1584422836.031:26): pid=9375 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.713339][ T27] audit: type=1800 audit(1584422836.031:27): pid=9375 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 '10.128.0.14' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 78.440920][ T9527] IPVS: ftp: loaded support on port[0] = 21 [ 78.476913][ T9530] ------------[ cut here ]------------ [ 78.482471][ T9530] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 78.491720][ T9530] WARNING: CPU: 1 PID: 9530 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 78.501187][ T9530] Kernel panic - not syncing: panic_on_warn set ... [ 78.507757][ T9530] CPU: 1 PID: 9530 Comm: syz-executor186 Not tainted 5.6.0-rc5-syzkaller #0 [ 78.516409][ T9530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.526479][ T9530] Call Trace: [ 78.529783][ T9530] dump_stack+0x188/0x20d [ 78.534113][ T9530] ? debug_print_object+0x80/0x250 [ 78.539215][ T9530] panic+0x2e3/0x75c [ 78.543096][ T9530] ? add_taint.cold+0x16/0x16 [ 78.547766][ T9530] ? __probe_kernel_read+0x188/0x1d0 [ 78.553051][ T9530] ? __warn.cold+0x14/0x35 [ 78.557480][ T9530] ? __warn+0xd5/0x1c8 [ 78.561631][ T9530] ? debug_print_object+0x160/0x250 [ 78.566826][ T9530] __warn.cold+0x2f/0x35 [ 78.571062][ T9530] ? debug_print_object+0x160/0x250 [ 78.576428][ T9530] report_bug+0x27b/0x2f0 [ 78.580764][ T9530] do_error_trap+0x12b/0x220 [ 78.585348][ T9530] ? debug_print_object+0x160/0x250 [ 78.590557][ T9530] do_invalid_op+0x32/0x40 [ 78.594973][ T9530] ? debug_print_object+0x160/0x250 [ 78.600181][ T9530] invalid_op+0x23/0x30 [ 78.604321][ T9530] RIP: 0010:debug_print_object+0x160/0x250 [ 78.610108][ T9530] 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 8b cf d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 78.629889][ T9530] RSP: 0018:ffffc90002077178 EFLAGS: 00010282 [ 78.636051][ T9530] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 78.644023][ T9530] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200040ee21 [ 78.652121][ T9530] RBP: 0000000000000001 R08: ffff888095aa2180 R09: fffffbfff180f778 [ 78.660272][ T9530] R10: fffffbfff180f777 R11: ffffffff8c07bbbf R12: ffffffff897acba0 [ 78.668352][ T9530] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200040ee3c [ 78.676594][ T9530] ? vprintk_func+0x81/0x17e [ 78.681277][ T9530] ? debug_print_object+0x160/0x250 [ 78.686472][ T9530] ? lockdep_hardirqs_on+0x417/0x5d0 [ 78.691970][ T9530] debug_object_activate+0x346/0x470 [ 78.697432][ T9530] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 78.703258][ T9530] ? debug_object_init_on_stack+0x20/0x20 [ 78.708973][ T9530] ? find_held_lock+0x2d/0x110 [ 78.713848][ T9530] ? free_object+0x70/0x70 [ 78.718252][ T9530] ? lock_downgrade+0x7f0/0x7f0 [ 78.723102][ T9530] ? delayed_work_timer_fn+0x90/0x90 [ 78.728470][ T9530] call_rcu+0x2c/0x690 [ 78.732525][ T9530] queue_rcu_work+0x82/0xa0 [ 78.737017][ T9530] route4_change+0x19e8/0x2250 [ 78.741791][ T9530] ? route4_destroy+0x800/0x800 [ 78.746743][ T9530] ? wait_for_completion+0x3c0/0x3c0 [ 78.752039][ T9530] tc_new_tfilter+0xa59/0x20b0 [ 78.756925][ T9530] ? route4_destroy+0x800/0x800 [ 78.761780][ T9530] ? tc_del_tfilter+0x1430/0x1430 [ 78.766804][ T9530] ? __lock_acquire+0x80b/0x3ca0 [ 78.771840][ T9530] ? apparmor_capable+0x454/0x8a0 [ 78.776871][ T9530] ? rcu_read_lock_held+0x9c/0xb0 [ 78.781890][ T9530] ? tc_del_tfilter+0x1430/0x1430 [ 78.786923][ T9530] rtnetlink_rcv_msg+0x810/0xad0 [ 78.791848][ T9530] ? rtnl_bridge_getlink+0x870/0x870 [ 78.797121][ T9530] ? mark_held_locks+0xe0/0xe0 [ 78.801868][ T9530] ? netlink_deliver_tap+0x146/0xb50 [ 78.807144][ T9530] netlink_rcv_skb+0x15a/0x410 [ 78.812077][ T9530] ? rtnl_bridge_getlink+0x870/0x870 [ 78.817347][ T9530] ? netlink_ack+0xa80/0xa80 [ 78.821947][ T9530] netlink_unicast+0x537/0x740 [ 78.826764][ T9530] ? netlink_attachskb+0x810/0x810 [ 78.832208][ T9530] ? _copy_from_iter_full+0x25c/0x870 [ 78.837582][ T9530] ? __phys_addr_symbol+0x2c/0x70 [ 78.842623][ T9530] ? __check_object_size+0x171/0x437 [ 78.847901][ T9530] netlink_sendmsg+0x882/0xe10 [ 78.852670][ T9530] ? aa_af_perm+0x260/0x260 [ 78.857265][ T9530] ? netlink_unicast+0x740/0x740 [ 78.862219][ T9530] ? netlink_unicast+0x740/0x740 [ 78.867144][ T9530] sock_sendmsg+0xcf/0x120 [ 78.871546][ T9530] ____sys_sendmsg+0x6b9/0x7d0 [ 78.876292][ T9530] ? kernel_sendmsg+0x50/0x50 [ 78.881104][ T9530] ___sys_sendmsg+0x100/0x170 [ 78.885841][ T9530] ? sendmsg_copy_msghdr+0x70/0x70 [ 78.890952][ T9530] ? __fget_files+0x329/0x4f0 [ 78.895634][ T9530] ? ksys_dup3+0x3c0/0x3c0 [ 78.900043][ T9530] ? __fget_light+0x208/0x270 [ 78.904704][ T9530] __sys_sendmsg+0xec/0x1b0 [ 78.909195][ T9530] ? __sys_sendmsg_sock+0xb0/0xb0 [ 78.914202][ T9530] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 78.920186][ T9530] ? __x64_sys_futex+0x380/0x4f0 [ 78.925115][ T9530] ? trace_hardirqs_off_caller+0x55/0x230 [ 78.930818][ T9530] ? do_syscall_64+0x21/0x7d0 [ 78.935494][ T9530] do_syscall_64+0xf6/0x7d0 [ 78.939996][ T9530] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.945874][ T9530] RIP: 0033:0x446e09 [ 78.949751][ T9530] 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 [ 78.969354][ T9530] RSP: 002b:00007f04239b9d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 78.977769][ T9530] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 78.985727][ T9530] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 78.993684][ T9530] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 79.001696][ T9530] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 79.010232][ T9530] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 79.019728][ T9530] Kernel Offset: disabled [ 79.024121][ T9530] Rebooting in 86400 seconds..