[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.248088][ T27] audit: type=1800 audit(1584536400.205:25): pid=9221 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.267988][ T27] audit: type=1800 audit(1584536400.205:26): pid=9221 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.321692][ T27] audit: type=1800 audit(1584536400.215:27): pid=9221 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 '10.128.0.122' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.076568][ T9374] IPVS: ftp: loaded support on port[0] = 21 [ 95.113651][ T9377] ------------[ cut here ]------------ [ 95.119479][ T9377] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 95.128489][ T9377] WARNING: CPU: 1 PID: 9377 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 95.137946][ T9377] Kernel panic - not syncing: panic_on_warn set ... [ 95.144521][ T9377] CPU: 1 PID: 9377 Comm: syz-executor921 Not tainted 5.6.0-rc6-syzkaller #0 [ 95.153259][ T9377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.163308][ T9377] Call Trace: [ 95.166601][ T9377] dump_stack+0x188/0x20d [ 95.170918][ T9377] ? debug_print_object+0x120/0x250 [ 95.176105][ T9377] panic+0x2e3/0x75c [ 95.179990][ T9377] ? add_taint.cold+0x16/0x16 [ 95.184662][ T9377] ? __probe_kernel_read+0x188/0x1d0 [ 95.189935][ T9377] ? __warn.cold+0x14/0x35 [ 95.194346][ T9377] ? __warn+0xd5/0x1c8 [ 95.198408][ T9377] ? debug_print_object+0x160/0x250 [ 95.203599][ T9377] __warn.cold+0x2f/0x35 [ 95.207838][ T9377] ? debug_print_object+0x160/0x250 [ 95.213143][ T9377] report_bug+0x27b/0x2f0 [ 95.217469][ T9377] do_error_trap+0x12b/0x220 [ 95.222039][ T9377] ? debug_print_object+0x160/0x250 [ 95.227236][ T9377] do_invalid_op+0x32/0x40 [ 95.231653][ T9377] ? debug_print_object+0x160/0x250 [ 95.236874][ T9377] invalid_op+0x23/0x30 [ 95.241009][ T9377] RIP: 0010:debug_print_object+0x160/0x250 [ 95.246792][ T9377] 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 [ 95.266385][ T9377] RSP: 0018:ffffc90002067178 EFLAGS: 00010282 [ 95.272452][ T9377] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 95.280406][ T9377] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200040ce21 [ 95.288360][ T9377] RBP: 0000000000000001 R08: ffff8880936fa180 R09: fffffbfff180e578 [ 95.296422][ T9377] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 95.304385][ T9377] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200040ce3c [ 95.312358][ T9377] ? vprintk_func+0x81/0x17e [ 95.321456][ T9377] ? debug_print_object+0x160/0x250 [ 95.326698][ T9377] ? lockdep_hardirqs_on+0x417/0x5d0 [ 95.332139][ T9377] debug_object_activate+0x346/0x470 [ 95.337562][ T9377] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 95.343470][ T9377] ? debug_object_init_on_stack+0x20/0x20 [ 95.349176][ T9377] ? find_held_lock+0x2d/0x110 [ 95.353942][ T9377] ? free_object+0x70/0x70 [ 95.358357][ T9377] ? lock_downgrade+0x7f0/0x7f0 [ 95.363208][ T9377] ? delayed_work_timer_fn+0x90/0x90 [ 95.368577][ T9377] call_rcu+0x2c/0x690 [ 95.372665][ T9377] queue_rcu_work+0x82/0xa0 [ 95.377158][ T9377] route4_change+0x19e8/0x2250 [ 95.381913][ T9377] ? route4_destroy+0x800/0x800 [ 95.386848][ T9377] ? wait_for_completion+0x3c0/0x3c0 [ 95.392142][ T9377] tc_new_tfilter+0xa59/0x20b0 [ 95.396894][ T9377] ? route4_destroy+0x800/0x800 [ 95.401754][ T9377] ? tc_del_tfilter+0x1430/0x1430 [ 95.406783][ T9377] ? __lock_acquire+0x80b/0x3ca0 [ 95.411798][ T9377] ? apparmor_capable+0x454/0x8a0 [ 95.416820][ T9377] ? rcu_read_lock_held+0x9c/0xb0 [ 95.421838][ T9377] ? tc_del_tfilter+0x1430/0x1430 [ 95.426850][ T9377] rtnetlink_rcv_msg+0x810/0xad0 [ 95.431791][ T9377] ? rtnl_bridge_getlink+0x880/0x880 [ 95.437336][ T9377] ? mark_held_locks+0xe0/0xe0 [ 95.442099][ T9377] ? netlink_deliver_tap+0x146/0xb50 [ 95.447383][ T9377] netlink_rcv_skb+0x15a/0x410 [ 95.452135][ T9377] ? rtnl_bridge_getlink+0x880/0x880 [ 95.457407][ T9377] ? netlink_ack+0xa80/0xa80 [ 95.462014][ T9377] netlink_unicast+0x537/0x740 [ 95.466785][ T9377] ? netlink_attachskb+0x810/0x810 [ 95.471879][ T9377] ? _copy_from_iter_full+0x25c/0x870 [ 95.477234][ T9377] ? __phys_addr_symbol+0x2c/0x70 [ 95.482262][ T9377] ? __check_object_size+0x171/0x437 [ 95.487623][ T9377] netlink_sendmsg+0x882/0xe10 [ 95.492392][ T9377] ? aa_af_perm+0x260/0x260 [ 95.496887][ T9377] ? netlink_unicast+0x740/0x740 [ 95.501825][ T9377] ? netlink_unicast+0x740/0x740 [ 95.506748][ T9377] sock_sendmsg+0xcf/0x120 [ 95.511149][ T9377] ____sys_sendmsg+0x6b9/0x7d0 [ 95.515900][ T9377] ? kernel_sendmsg+0x50/0x50 [ 95.520603][ T9377] ___sys_sendmsg+0x100/0x170 [ 95.525286][ T9377] ? sendmsg_copy_msghdr+0x70/0x70 [ 95.530390][ T9377] ? __fget_files+0x329/0x4f0 [ 95.535067][ T9377] ? ksys_dup3+0x3c0/0x3c0 [ 95.539472][ T9377] ? __fget_light+0x208/0x270 [ 95.544145][ T9377] __sys_sendmsg+0xec/0x1b0 [ 95.548639][ T9377] ? __sys_sendmsg_sock+0xb0/0xb0 [ 95.553644][ T9377] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 95.559603][ T9377] ? __x64_sys_futex+0x380/0x4f0 [ 95.564535][ T9377] ? trace_hardirqs_off_caller+0x55/0x230 [ 95.570234][ T9377] ? do_syscall_64+0x21/0x7d0 [ 95.574893][ T9377] do_syscall_64+0xf6/0x7d0 [ 95.579565][ T9377] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.585460][ T9377] RIP: 0033:0x446e09 [ 95.591247][ T9377] 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 [ 95.610834][ T9377] RSP: 002b:00007fa061518d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 95.619229][ T9377] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 95.627189][ T9377] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 95.635145][ T9377] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 95.643121][ T9377] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 95.651081][ T9377] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 95.660634][ T9377] Kernel Offset: disabled [ 95.665061][ T9377] Rebooting in 86400 seconds..