[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.077626][ T27] audit: type=1800 audit(1584273713.930:25): pid=9285 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.103813][ T27] audit: type=1800 audit(1584273713.930:26): pid=9285 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.150841][ T27] audit: type=1800 audit(1584273713.930:27): pid=9285 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 83.519405][ T9440] IPVS: ftp: loaded support on port[0] = 21 [ 83.562227][ T9446] ------------[ cut here ]------------ [ 83.568223][ T9446] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 83.577169][ T9446] WARNING: CPU: 0 PID: 9446 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 83.586623][ T9446] Kernel panic - not syncing: panic_on_warn set ... [ 83.593198][ T9446] CPU: 0 PID: 9446 Comm: syz-executor441 Not tainted 5.6.0-rc5-syzkaller #0 [ 83.601854][ T9446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.611904][ T9446] Call Trace: [ 83.615203][ T9446] dump_stack+0x188/0x20d [ 83.619524][ T9446] ? debug_print_object+0x80/0x250 [ 83.624620][ T9446] panic+0x2e3/0x75c [ 83.628497][ T9446] ? add_taint.cold+0x16/0x16 [ 83.633162][ T9446] ? __probe_kernel_read+0x188/0x1d0 [ 83.638448][ T9446] ? __warn.cold+0x14/0x35 [ 83.642867][ T9446] ? __warn+0xd5/0x1c8 [ 83.646949][ T9446] ? debug_print_object+0x160/0x250 [ 83.652138][ T9446] __warn.cold+0x2f/0x35 [ 83.656385][ T9446] ? debug_print_object+0x160/0x250 [ 83.661567][ T9446] report_bug+0x27b/0x2f0 [ 83.665882][ T9446] do_error_trap+0x12b/0x220 [ 83.670575][ T9446] ? debug_print_object+0x160/0x250 [ 83.675773][ T9446] do_invalid_op+0x32/0x40 [ 83.680173][ T9446] ? debug_print_object+0x160/0x250 [ 83.685368][ T9446] invalid_op+0x23/0x30 [ 83.689519][ T9446] RIP: 0010:debug_print_object+0x160/0x250 [ 83.695321][ T9446] 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 0b ce d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 83.714912][ T9446] RSP: 0018:ffffc90001ff7178 EFLAGS: 00010282 [ 83.720965][ T9446] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 83.729024][ T9446] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff520003fee21 [ 83.736982][ T9446] RBP: 0000000000000001 R08: ffff888093604280 R09: fffffbfff180f778 [ 83.744950][ T9446] R10: fffffbfff180f777 R11: ffffffff8c07bbbf R12: ffffffff897acba0 [ 83.752910][ T9446] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003fee3c [ 83.760981][ T9446] ? vprintk_func+0x81/0x17e [ 83.765562][ T9446] ? debug_print_object+0x160/0x250 [ 83.770747][ T9446] ? lockdep_hardirqs_on+0x417/0x5d0 [ 83.776015][ T9446] debug_object_activate+0x346/0x470 [ 83.781291][ T9446] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 83.787254][ T9446] ? debug_object_init_on_stack+0x20/0x20 [ 83.792957][ T9446] ? find_held_lock+0x2d/0x110 [ 83.797700][ T9446] ? free_object+0x70/0x70 [ 83.802096][ T9446] ? lock_downgrade+0x7f0/0x7f0 [ 83.806933][ T9446] ? delayed_work_timer_fn+0x90/0x90 [ 83.812200][ T9446] call_rcu+0x2c/0x690 [ 83.816256][ T9446] queue_rcu_work+0x82/0xa0 [ 83.820743][ T9446] route4_change+0x19e8/0x2250 [ 83.825493][ T9446] ? route4_destroy+0x800/0x800 [ 83.830360][ T9446] ? wait_for_completion+0x3c0/0x3c0 [ 83.835650][ T9446] tc_new_tfilter+0xa59/0x20b0 [ 83.840404][ T9446] ? route4_destroy+0x800/0x800 [ 83.845259][ T9446] ? tc_del_tfilter+0x1430/0x1430 [ 83.850286][ T9446] ? __lock_acquire+0x80b/0x3ca0 [ 83.855222][ T9446] ? apparmor_capable+0x454/0x8a0 [ 83.860246][ T9446] ? rcu_read_lock_held+0x9c/0xb0 [ 83.865256][ T9446] ? tc_del_tfilter+0x1430/0x1430 [ 83.870273][ T9446] rtnetlink_rcv_msg+0x810/0xad0 [ 83.875199][ T9446] ? rtnl_bridge_getlink+0x870/0x870 [ 83.880469][ T9446] ? mark_held_locks+0xe0/0xe0 [ 83.885215][ T9446] ? netlink_deliver_tap+0x146/0xb50 [ 83.890485][ T9446] netlink_rcv_skb+0x15a/0x410 [ 83.895251][ T9446] ? rtnl_bridge_getlink+0x870/0x870 [ 83.900530][ T9446] ? netlink_ack+0xa80/0xa80 [ 83.905116][ T9446] netlink_unicast+0x537/0x740 [ 83.909874][ T9446] ? netlink_attachskb+0x810/0x810 [ 83.917378][ T9446] ? _copy_from_iter_full+0x25c/0x870 [ 83.922742][ T9446] ? __phys_addr_symbol+0x2c/0x70 [ 83.927786][ T9446] ? __check_object_size+0x171/0x437 [ 83.933070][ T9446] netlink_sendmsg+0x882/0xe10 [ 83.937831][ T9446] ? aa_af_perm+0x260/0x260 [ 83.942322][ T9446] ? netlink_unicast+0x740/0x740 [ 83.947264][ T9446] ? netlink_unicast+0x740/0x740 [ 83.953073][ T9446] sock_sendmsg+0xcf/0x120 [ 83.957476][ T9446] ____sys_sendmsg+0x6b9/0x7d0 [ 83.965442][ T9446] ? kernel_sendmsg+0x50/0x50 [ 83.970112][ T9446] ___sys_sendmsg+0x100/0x170 [ 83.974861][ T9446] ? sendmsg_copy_msghdr+0x70/0x70 [ 83.979960][ T9446] ? __fget_files+0x329/0x4f0 [ 83.984645][ T9446] ? ksys_dup3+0x3c0/0x3c0 [ 83.989063][ T9446] ? __fget_light+0x208/0x270 [ 83.993727][ T9446] __sys_sendmsg+0xec/0x1b0 [ 83.998212][ T9446] ? __sys_sendmsg_sock+0xb0/0xb0 [ 84.003218][ T9446] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 84.009181][ T9446] ? __x64_sys_futex+0x380/0x4f0 [ 84.014110][ T9446] ? trace_hardirqs_off_caller+0x55/0x230 [ 84.019814][ T9446] ? do_syscall_64+0x21/0x7d0 [ 84.024488][ T9446] do_syscall_64+0xf6/0x7d0 [ 84.028976][ T9446] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.034848][ T9446] RIP: 0033:0x446e09 [ 84.038731][ T9446] 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 [ 84.058319][ T9446] RSP: 002b:00007fa0fbbe3d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 84.066726][ T9446] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 84.074791][ T9446] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 84.082764][ T9446] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 84.090806][ T9446] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 84.098786][ T9446] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 84.109281][ T9446] Kernel Offset: disabled [ 84.113742][ T9446] Rebooting in 86400 seconds..