[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 79.899934][ T27] audit: type=1800 audit(1584645711.028:25): pid=9519 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 79.919653][ T27] audit: type=1800 audit(1584645711.028:26): pid=9519 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 79.946620][ T27] audit: type=1800 audit(1584645711.028:27): pid=9519 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 '10.128.1.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.949005][ T9673] IPVS: ftp: loaded support on port[0] = 21 [ 88.983640][ T9676] ------------[ cut here ]------------ [ 88.989319][ T9676] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 88.998487][ T9676] WARNING: CPU: 1 PID: 9676 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 89.007945][ T9676] Kernel panic - not syncing: panic_on_warn set ... [ 89.014516][ T9676] CPU: 1 PID: 9676 Comm: syz-executor770 Not tainted 5.6.0-rc5-syzkaller #0 [ 89.023164][ T9676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.033203][ T9676] Call Trace: [ 89.036481][ T9676] dump_stack+0x188/0x20d [ 89.040927][ T9676] ? debug_print_object+0x80/0x250 [ 89.046017][ T9676] panic+0x2e3/0x75c [ 89.049902][ T9676] ? add_taint.cold+0x16/0x16 [ 89.054574][ T9676] ? __probe_kernel_read+0x188/0x1d0 [ 89.059845][ T9676] ? __warn.cold+0x14/0x35 [ 89.064265][ T9676] ? __warn+0xd5/0x1c8 [ 89.068330][ T9676] ? debug_print_object+0x160/0x250 [ 89.073524][ T9676] __warn.cold+0x2f/0x35 [ 89.077750][ T9676] ? debug_print_object+0x160/0x250 [ 89.082950][ T9676] report_bug+0x27b/0x2f0 [ 89.087272][ T9676] do_error_trap+0x12b/0x220 [ 89.091843][ T9676] ? debug_print_object+0x160/0x250 [ 89.097030][ T9676] do_invalid_op+0x32/0x40 [ 89.101425][ T9676] ? debug_print_object+0x160/0x250 [ 89.106619][ T9676] invalid_op+0x23/0x30 [ 89.110776][ T9676] RIP: 0010:debug_print_object+0x160/0x250 [ 89.116581][ T9676] 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 [ 89.136172][ T9676] RSP: 0018:ffffc9000206f178 EFLAGS: 00010282 [ 89.142231][ T9676] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 89.150188][ T9676] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200040de21 [ 89.158228][ T9676] RBP: 0000000000000001 R08: ffff88808ff601c0 R09: ffffed1015ce6659 [ 89.166195][ T9676] R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: ffffffff899acba0 [ 89.174161][ T9676] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200040de3c [ 89.182489][ T9676] ? vprintk_func+0x81/0x17e [ 89.187150][ T9676] ? debug_print_object+0x160/0x250 [ 89.192328][ T9676] ? lockdep_hardirqs_on+0x417/0x5d0 [ 89.197596][ T9676] debug_object_activate+0x346/0x470 [ 89.202880][ T9676] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 89.208667][ T9676] ? debug_object_init_on_stack+0x20/0x20 [ 89.214372][ T9676] ? find_held_lock+0x2d/0x110 [ 89.219136][ T9676] ? free_object+0x70/0x70 [ 89.223540][ T9676] ? lock_downgrade+0x7f0/0x7f0 [ 89.228378][ T9676] ? delayed_work_timer_fn+0x90/0x90 [ 89.233659][ T9676] call_rcu+0x2c/0x690 [ 89.237721][ T9676] queue_rcu_work+0x82/0xa0 [ 89.242211][ T9676] route4_change+0x19e8/0x2250 [ 89.247084][ T9676] ? route4_destroy+0x800/0x800 [ 89.251937][ T9676] ? wait_for_completion+0x3c0/0x3c0 [ 89.257228][ T9676] tc_new_tfilter+0xa59/0x20b0 [ 89.261984][ T9676] ? route4_destroy+0x800/0x800 [ 89.266828][ T9676] ? tc_del_tfilter+0x1430/0x1430 [ 89.271839][ T9676] ? __lock_acquire+0x80b/0x3ca0 [ 89.276761][ T9676] ? apparmor_capable+0x454/0x8a0 [ 89.281785][ T9676] ? rcu_read_lock_held+0x9c/0xb0 [ 89.286845][ T9676] ? tc_del_tfilter+0x1430/0x1430 [ 89.291928][ T9676] rtnetlink_rcv_msg+0x810/0xad0 [ 89.297042][ T9676] ? rtnl_bridge_getlink+0x870/0x870 [ 89.302473][ T9676] ? mark_held_locks+0xe0/0xe0 [ 89.307837][ T9676] ? netlink_deliver_tap+0x146/0xb50 [ 89.313105][ T9676] netlink_rcv_skb+0x15a/0x410 [ 89.317855][ T9676] ? rtnl_bridge_getlink+0x870/0x870 [ 89.323121][ T9676] ? netlink_ack+0xa80/0xa80 [ 89.327700][ T9676] netlink_unicast+0x537/0x740 [ 89.332454][ T9676] ? netlink_attachskb+0x810/0x810 [ 89.337545][ T9676] ? _copy_from_iter_full+0x25c/0x870 [ 89.342893][ T9676] ? __phys_addr_symbol+0x2c/0x70 [ 89.347895][ T9676] ? __check_object_size+0x171/0x437 [ 89.353162][ T9676] netlink_sendmsg+0x882/0xe10 [ 89.357907][ T9676] ? aa_af_perm+0x260/0x260 [ 89.362392][ T9676] ? netlink_unicast+0x740/0x740 [ 89.367321][ T9676] ? netlink_unicast+0x740/0x740 [ 89.372238][ T9676] sock_sendmsg+0xcf/0x120 [ 89.376633][ T9676] ____sys_sendmsg+0x6b9/0x7d0 [ 89.381376][ T9676] ? kernel_sendmsg+0x50/0x50 [ 89.386038][ T9676] ___sys_sendmsg+0x100/0x170 [ 89.390698][ T9676] ? sendmsg_copy_msghdr+0x70/0x70 [ 89.395792][ T9676] ? __fget_files+0x329/0x4f0 [ 89.400477][ T9676] ? ksys_dup3+0x3c0/0x3c0 [ 89.404898][ T9676] ? __fget_light+0x208/0x270 [ 89.409562][ T9676] __sys_sendmsg+0xec/0x1b0 [ 89.414044][ T9676] ? __sys_sendmsg_sock+0xb0/0xb0 [ 89.419045][ T9676] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 89.425012][ T9676] ? __x64_sys_futex+0x380/0x4f0 [ 89.429937][ T9676] ? trace_hardirqs_off_caller+0x55/0x230 [ 89.435736][ T9676] ? do_syscall_64+0x21/0x7d0 [ 89.440411][ T9676] do_syscall_64+0xf6/0x7d0 [ 89.444896][ T9676] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.450781][ T9676] RIP: 0033:0x4472a9 [ 89.454667][ T9676] 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 [ 89.475119][ T9676] RSP: 002b:00007f28e8d49d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 89.483522][ T9676] RAX: ffffffffffffffda RBX: 00000000006dcc78 RCX: 00000000004472a9 [ 89.491514][ T9676] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 89.499464][ T9676] RBP: 00000000006dcc70 R08: 0000000000000000 R09: 0000000000000000 [ 89.507430][ T9676] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc7c [ 89.515390][ T9676] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 89.524914][ T9676] Kernel Offset: disabled [ 89.529315][ T9676] Rebooting in 86400 seconds..