[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 91.335770][ T27] audit: type=1800 audit(1583796829.376:25): pid=9520 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 91.371124][ T27] audit: type=1800 audit(1583796829.376:26): pid=9520 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 91.428759][ T27] audit: type=1800 audit(1583796829.386:27): pid=9520 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 '10.128.0.106' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 117.763156][ T9677] IPVS: ftp: loaded support on port[0] = 21 [ 117.808869][ T9678] ------------[ cut here ]------------ [ 117.814534][ T9678] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 117.823963][ T9678] WARNING: CPU: 0 PID: 9678 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 117.833415][ T9678] Kernel panic - not syncing: panic_on_warn set ... [ 117.840227][ T9678] CPU: 0 PID: 9678 Comm: syz-executor828 Not tainted 5.6.0-rc5-syzkaller #0 [ 117.848891][ T9678] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 117.858934][ T9678] Call Trace: [ 117.862224][ T9678] dump_stack+0x188/0x20d [ 117.866556][ T9678] ? debug_print_object+0xc0/0x250 [ 117.871665][ T9678] panic+0x2e3/0x75c [ 117.875571][ T9678] ? add_taint.cold+0x16/0x16 [ 117.880244][ T9678] ? __probe_kernel_read+0x188/0x1d0 [ 117.885527][ T9678] ? __warn.cold+0x14/0x35 [ 117.889940][ T9678] ? __warn+0xd5/0x1c8 [ 117.893991][ T9678] ? debug_print_object+0x160/0x250 [ 117.899172][ T9678] __warn.cold+0x2f/0x35 [ 117.903419][ T9678] ? debug_print_object+0x160/0x250 [ 117.908609][ T9678] report_bug+0x27b/0x2f0 [ 117.912931][ T9678] do_error_trap+0x12b/0x220 [ 117.917519][ T9678] ? debug_print_object+0x160/0x250 [ 117.922726][ T9678] do_invalid_op+0x32/0x40 [ 117.927183][ T9678] ? debug_print_object+0x160/0x250 [ 117.932379][ T9678] invalid_op+0x23/0x30 [ 117.936525][ T9678] RIP: 0010:debug_print_object+0x160/0x250 [ 117.942321][ T9678] 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 78 d9 b1 fd <0f> 0b 83 05 0b b7 d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 117.961936][ T9678] RSP: 0018:ffffc900020d7178 EFLAGS: 00010282 [ 117.967998][ T9678] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 117.976008][ T9678] RDX: 0000000000000000 RSI: ffffffff815bf4f1 RDI: fffff5200041ae21 [ 117.983961][ T9678] RBP: 0000000000000001 R08: ffff8880a8a1e540 R09: ffffed1015cc6659 [ 117.991917][ T9678] R10: ffffed1015cc6658 R11: ffff8880ae6332c7 R12: ffffffff897acba0 [ 117.999882][ T9678] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200041ae3c [ 118.007980][ T9678] ? vprintk_func+0x81/0x17e [ 118.012577][ T9678] ? debug_print_object+0x160/0x250 [ 118.017803][ T9678] ? lockdep_hardirqs_on+0x417/0x5d0 [ 118.023103][ T9678] debug_object_activate+0x346/0x470 [ 118.028438][ T9678] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 118.034249][ T9678] ? debug_object_init_on_stack+0x20/0x20 [ 118.040028][ T9678] ? find_held_lock+0x2d/0x110 [ 118.044908][ T9678] ? free_object+0x70/0x70 [ 118.049427][ T9678] ? lock_downgrade+0x7f0/0x7f0 [ 118.054280][ T9678] ? delayed_work_timer_fn+0x90/0x90 [ 118.059670][ T9678] call_rcu+0x2c/0x690 [ 118.063743][ T9678] queue_rcu_work+0x82/0xa0 [ 118.068253][ T9678] route4_change+0x19e8/0x2250 [ 118.073027][ T9678] ? route4_destroy+0x800/0x800 [ 118.077904][ T9678] ? wait_for_completion+0x3c0/0x3c0 [ 118.083197][ T9678] tc_new_tfilter+0xa59/0x20b0 [ 118.087969][ T9678] ? route4_destroy+0x800/0x800 [ 118.092824][ T9678] ? tc_del_tfilter+0x1430/0x1430 [ 118.097841][ T9678] ? __lock_acquire+0x80b/0x3ca0 [ 118.102877][ T9678] ? apparmor_capable+0x454/0x8a0 [ 118.107991][ T9678] ? rcu_read_lock_held+0x9c/0xb0 [ 118.113241][ T9678] ? tc_del_tfilter+0x1430/0x1430 [ 118.118286][ T9678] rtnetlink_rcv_msg+0x810/0xad0 [ 118.123230][ T9678] ? rtnl_bridge_getlink+0x880/0x880 [ 118.128537][ T9678] ? mark_held_locks+0xe0/0xe0 [ 118.133307][ T9678] ? netlink_deliver_tap+0x146/0xb50 [ 118.138603][ T9678] netlink_rcv_skb+0x15a/0x410 [ 118.143372][ T9678] ? rtnl_bridge_getlink+0x880/0x880 [ 118.148657][ T9678] ? netlink_ack+0xa80/0xa80 [ 118.153311][ T9678] netlink_unicast+0x537/0x740 [ 118.158092][ T9678] ? netlink_attachskb+0x810/0x810 [ 118.163194][ T9678] ? _copy_from_iter_full+0x25c/0x870 [ 118.168763][ T9678] ? __phys_addr_symbol+0x2c/0x70 [ 118.173780][ T9678] ? __check_object_size+0x171/0x437 [ 118.179052][ T9678] netlink_sendmsg+0x882/0xe10 [ 118.183960][ T9678] ? aa_af_perm+0x260/0x260 [ 118.188502][ T9678] ? netlink_unicast+0x740/0x740 [ 118.193438][ T9678] ? netlink_unicast+0x740/0x740 [ 118.198437][ T9678] sock_sendmsg+0xcf/0x120 [ 118.202958][ T9678] ____sys_sendmsg+0x6b9/0x7d0 [ 118.207714][ T9678] ? kernel_sendmsg+0x50/0x50 [ 118.212401][ T9678] ___sys_sendmsg+0x100/0x170 [ 118.217069][ T9678] ? sendmsg_copy_msghdr+0x70/0x70 [ 118.222174][ T9678] ? __fget_files+0x329/0x4f0 [ 118.226833][ T9678] ? ksys_dup3+0x3c0/0x3c0 [ 118.231239][ T9678] ? __fget_light+0x208/0x270 [ 118.235974][ T9678] __sys_sendmsg+0xec/0x1b0 [ 118.240495][ T9678] ? __sys_sendmsg_sock+0xb0/0xb0 [ 118.245652][ T9678] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 118.251749][ T9678] ? __x64_sys_futex+0x380/0x4f0 [ 118.256681][ T9678] ? trace_hardirqs_off_caller+0x55/0x230 [ 118.262460][ T9678] ? do_syscall_64+0x21/0x7d0 [ 118.267123][ T9678] do_syscall_64+0xf6/0x7d0 [ 118.271617][ T9678] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 118.277489][ T9678] RIP: 0033:0x446fa9 [ 118.281380][ T9678] Code: e8 4c 14 03 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 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 118.300981][ T9678] RSP: 002b:00007f7d718e2d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 118.309571][ T9678] RAX: ffffffffffffffda RBX: 00000000006dcc68 RCX: 0000000000446fa9 [ 118.317587][ T9678] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 118.325565][ T9678] RBP: 00000000006dcc60 R08: 0000000000000000 R09: 0000000000000000 [ 118.333536][ T9678] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc6c [ 118.341492][ T9678] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 118.351474][ T9678] Kernel Offset: disabled [ 118.355896][ T9678] Rebooting in 86400 seconds..