[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 76.551914][ T27] audit: type=1800 audit(1584642727.279:25): pid=9121 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 76.573224][ T27] audit: type=1800 audit(1584642727.279:26): pid=9121 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.624041][ T27] audit: type=1800 audit(1584642727.279:27): pid=9121 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 '10.128.0.154' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 87.396964][ T9274] IPVS: ftp: loaded support on port[0] = 21 [ 87.446269][ T9285] ------------[ cut here ]------------ [ 87.451873][ T9285] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 87.460848][ T9285] WARNING: CPU: 1 PID: 9285 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 87.470303][ T9285] Kernel panic - not syncing: panic_on_warn set ... [ 87.476901][ T9285] CPU: 1 PID: 9285 Comm: syz-executor369 Not tainted 5.6.0-rc5-syzkaller #0 [ 87.485583][ T9285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.495625][ T9285] Call Trace: [ 87.498920][ T9285] dump_stack+0x188/0x20d [ 87.503244][ T9285] ? debug_print_object+0x80/0x250 [ 87.508339][ T9285] panic+0x2e3/0x75c [ 87.512232][ T9285] ? add_taint.cold+0x16/0x16 [ 87.516906][ T9285] ? __probe_kernel_read+0x188/0x1d0 [ 87.522187][ T9285] ? __warn.cold+0x14/0x35 [ 87.526603][ T9285] ? __warn+0xd5/0x1c8 [ 87.530669][ T9285] ? debug_print_object+0x160/0x250 [ 87.535848][ T9285] __warn.cold+0x2f/0x35 [ 87.540083][ T9285] ? debug_print_object+0x160/0x250 [ 87.545277][ T9285] report_bug+0x27b/0x2f0 [ 87.549615][ T9285] do_error_trap+0x12b/0x220 [ 87.554186][ T9285] ? debug_print_object+0x160/0x250 [ 87.559384][ T9285] do_invalid_op+0x32/0x40 [ 87.563780][ T9285] ? debug_print_object+0x160/0x250 [ 87.568957][ T9285] invalid_op+0x23/0x30 [ 87.573096][ T9285] RIP: 0010:debug_print_object+0x160/0x250 [ 87.578893][ T9285] 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 [ 87.598478][ T9285] RSP: 0018:ffffc90001f97178 EFLAGS: 00010282 [ 87.604527][ T9285] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 87.612478][ T9285] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff520003f2e21 [ 87.620454][ T9285] RBP: 0000000000000001 R08: ffff8880a2c00000 R09: fffffbfff1851178 [ 87.628406][ T9285] R10: fffffbfff1851177 R11: ffffffff8c288bbf R12: ffffffff899acba0 [ 87.636361][ T9285] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003f2e3c [ 87.644328][ T9285] ? vprintk_func+0x81/0x17e [ 87.648917][ T9285] ? debug_print_object+0x160/0x250 [ 87.654095][ T9285] ? lockdep_hardirqs_on+0x417/0x5d0 [ 87.659360][ T9285] debug_object_activate+0x346/0x470 [ 87.664623][ T9285] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 87.670425][ T9285] ? debug_object_init_on_stack+0x20/0x20 [ 87.676225][ T9285] ? find_held_lock+0x2d/0x110 [ 87.681016][ T9285] ? free_object+0x70/0x70 [ 87.685431][ T9285] ? lock_downgrade+0x7f0/0x7f0 [ 87.690290][ T9285] ? delayed_work_timer_fn+0x90/0x90 [ 87.695556][ T9285] call_rcu+0x2c/0x690 [ 87.699605][ T9285] queue_rcu_work+0x82/0xa0 [ 87.704099][ T9285] route4_change+0x19e8/0x2250 [ 87.708955][ T9285] ? route4_destroy+0x800/0x800 [ 87.713791][ T9285] ? wait_for_completion+0x3c0/0x3c0 [ 87.719057][ T9285] tc_new_tfilter+0xa59/0x20b0 [ 87.723812][ T9285] ? route4_destroy+0x800/0x800 [ 87.728653][ T9285] ? tc_del_tfilter+0x1430/0x1430 [ 87.733666][ T9285] ? __lock_acquire+0x80b/0x3ca0 [ 87.738595][ T9285] ? apparmor_capable+0x454/0x8a0 [ 87.743606][ T9285] ? rcu_read_lock_held+0x9c/0xb0 [ 87.748614][ T9285] ? tc_del_tfilter+0x1430/0x1430 [ 87.753615][ T9285] rtnetlink_rcv_msg+0x810/0xad0 [ 87.758546][ T9285] ? rtnl_bridge_getlink+0x870/0x870 [ 87.763814][ T9285] ? mark_held_locks+0xe0/0xe0 [ 87.768556][ T9285] ? netlink_deliver_tap+0x146/0xb50 [ 87.773823][ T9285] netlink_rcv_skb+0x15a/0x410 [ 87.778583][ T9285] ? rtnl_bridge_getlink+0x870/0x870 [ 87.783867][ T9285] ? netlink_ack+0xa80/0xa80 [ 87.788448][ T9285] netlink_unicast+0x537/0x740 [ 87.793209][ T9285] ? netlink_attachskb+0x810/0x810 [ 87.798300][ T9285] ? _copy_from_iter_full+0x25c/0x870 [ 87.803650][ T9285] ? __phys_addr_symbol+0x2c/0x70 [ 87.808667][ T9285] ? __check_object_size+0x171/0x437 [ 87.813938][ T9285] netlink_sendmsg+0x882/0xe10 [ 87.818687][ T9285] ? aa_af_perm+0x260/0x260 [ 87.823169][ T9285] ? netlink_unicast+0x740/0x740 [ 87.828110][ T9285] ? netlink_unicast+0x740/0x740 [ 87.833031][ T9285] sock_sendmsg+0xcf/0x120 [ 87.837492][ T9285] ____sys_sendmsg+0x6b9/0x7d0 [ 87.842239][ T9285] ? kernel_sendmsg+0x50/0x50 [ 87.846914][ T9285] ___sys_sendmsg+0x100/0x170 [ 87.851581][ T9285] ? sendmsg_copy_msghdr+0x70/0x70 [ 87.856688][ T9285] ? __fget_files+0x329/0x4f0 [ 87.861420][ T9285] ? ksys_dup3+0x3c0/0x3c0 [ 87.865829][ T9285] ? __fget_light+0x208/0x270 [ 87.870491][ T9285] __sys_sendmsg+0xec/0x1b0 [ 87.874974][ T9285] ? __sys_sendmsg_sock+0xb0/0xb0 [ 87.879983][ T9285] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 87.886525][ T9285] ? __x64_sys_futex+0x380/0x4f0 [ 87.891500][ T9285] ? trace_hardirqs_off_caller+0x55/0x230 [ 87.897208][ T9285] ? do_syscall_64+0x21/0x7d0 [ 87.902660][ T9285] do_syscall_64+0xf6/0x7d0 [ 87.907156][ T9285] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.913030][ T9285] RIP: 0033:0x446e09 [ 87.916904][ T9285] 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 [ 87.936493][ T9285] RSP: 002b:00007fb8602e4d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.944886][ T9285] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 87.952842][ T9285] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 87.960796][ T9285] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 87.968749][ T9285] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 87.976789][ T9285] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 87.986287][ T9285] Kernel Offset: disabled [ 87.990667][ T9285] Rebooting in 86400 seconds..