[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 76.458128][ T27] audit: type=1800 audit(1584323176.250:25): pid=9391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 76.482727][ T27] audit: type=1800 audit(1584323176.250:26): pid=9391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.529865][ T27] audit: type=1800 audit(1584323176.250:27): pid=9391 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 '10.128.0.220' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 87.754571][ T9545] IPVS: ftp: loaded support on port[0] = 21 [ 87.801177][ T9552] ------------[ cut here ]------------ [ 87.807208][ T9552] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 87.816173][ T9552] WARNING: CPU: 0 PID: 9552 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 87.825621][ T9552] Kernel panic - not syncing: panic_on_warn set ... [ 87.832287][ T9552] CPU: 0 PID: 9552 Comm: syz-executor025 Not tainted 5.6.0-rc5-syzkaller #0 [ 87.841187][ T9552] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.851264][ T9552] Call Trace: [ 87.854570][ T9552] dump_stack+0x188/0x20d [ 87.859010][ T9552] ? debug_print_object+0x120/0x250 [ 87.864202][ T9552] panic+0x2e3/0x75c [ 87.868093][ T9552] ? add_taint.cold+0x16/0x16 [ 87.872758][ T9552] ? __probe_kernel_read+0x188/0x1d0 [ 87.878025][ T9552] ? __warn.cold+0x14/0x35 [ 87.882433][ T9552] ? __warn+0xd5/0x1c8 [ 87.886501][ T9552] ? debug_print_object+0x160/0x250 [ 87.891698][ T9552] __warn.cold+0x2f/0x35 [ 87.895941][ T9552] ? debug_print_object+0x160/0x250 [ 87.902094][ T9552] report_bug+0x27b/0x2f0 [ 87.906430][ T9552] do_error_trap+0x12b/0x220 [ 87.911000][ T9552] ? debug_print_object+0x160/0x250 [ 87.916199][ T9552] do_invalid_op+0x32/0x40 [ 87.920628][ T9552] ? debug_print_object+0x160/0x250 [ 87.925832][ T9552] invalid_op+0x23/0x30 [ 87.929975][ T9552] RIP: 0010:debug_print_object+0x160/0x250 [ 87.935866][ T9552] 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 [ 87.955572][ T9552] RSP: 0018:ffffc900020f7178 EFLAGS: 00010282 [ 87.961632][ T9552] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 87.969591][ T9552] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200041ee21 [ 87.977549][ T9552] RBP: 0000000000000001 R08: ffff88809475e300 R09: fffffbfff180e578 [ 87.985505][ T9552] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 87.993467][ T9552] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200041ee3c [ 88.001463][ T9552] ? vprintk_func+0x81/0x17e [ 88.006081][ T9552] ? debug_print_object+0x160/0x250 [ 88.011793][ T9552] ? lockdep_hardirqs_on+0x417/0x5d0 [ 88.017069][ T9552] debug_object_activate+0x346/0x470 [ 88.022336][ T9552] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 88.028128][ T9552] ? debug_object_init_on_stack+0x20/0x20 [ 88.033828][ T9552] ? find_held_lock+0x2d/0x110 [ 88.038592][ T9552] ? free_object+0x70/0x70 [ 88.042998][ T9552] ? lock_downgrade+0x7f0/0x7f0 [ 88.047858][ T9552] ? delayed_work_timer_fn+0x90/0x90 [ 88.053231][ T9552] call_rcu+0x2c/0x690 [ 88.057306][ T9552] queue_rcu_work+0x82/0xa0 [ 88.061795][ T9552] route4_change+0x19e8/0x2250 [ 88.066549][ T9552] ? route4_destroy+0x800/0x800 [ 88.071404][ T9552] ? wait_for_completion+0x3c0/0x3c0 [ 88.076679][ T9552] tc_new_tfilter+0xa59/0x20b0 [ 88.081518][ T9552] ? route4_destroy+0x800/0x800 [ 88.086389][ T9552] ? tc_del_tfilter+0x1430/0x1430 [ 88.091403][ T9552] ? __lock_acquire+0x80b/0x3ca0 [ 88.096346][ T9552] ? apparmor_capable+0x454/0x8a0 [ 88.101363][ T9552] ? rcu_read_lock_held+0x9c/0xb0 [ 88.106376][ T9552] ? tc_del_tfilter+0x1430/0x1430 [ 88.111487][ T9552] rtnetlink_rcv_msg+0x810/0xad0 [ 88.116412][ T9552] ? rtnl_bridge_getlink+0x880/0x880 [ 88.121727][ T9552] ? mark_held_locks+0xe0/0xe0 [ 88.126719][ T9552] ? netlink_deliver_tap+0x146/0xb50 [ 88.132006][ T9552] netlink_rcv_skb+0x15a/0x410 [ 88.136763][ T9552] ? rtnl_bridge_getlink+0x880/0x880 [ 88.142209][ T9552] ? netlink_ack+0xa80/0xa80 [ 88.146807][ T9552] netlink_unicast+0x537/0x740 [ 88.151563][ T9552] ? netlink_attachskb+0x810/0x810 [ 88.156701][ T9552] ? _copy_from_iter_full+0x25c/0x870 [ 88.162076][ T9552] ? __phys_addr_symbol+0x2c/0x70 [ 88.167104][ T9552] ? __check_object_size+0x171/0x437 [ 88.172388][ T9552] netlink_sendmsg+0x882/0xe10 [ 88.177156][ T9552] ? aa_af_perm+0x260/0x260 [ 88.181644][ T9552] ? netlink_unicast+0x740/0x740 [ 88.186758][ T9552] ? netlink_unicast+0x740/0x740 [ 88.191689][ T9552] sock_sendmsg+0xcf/0x120 [ 88.196107][ T9552] ____sys_sendmsg+0x6b9/0x7d0 [ 88.200874][ T9552] ? kernel_sendmsg+0x50/0x50 [ 88.205958][ T9552] ___sys_sendmsg+0x100/0x170 [ 88.210709][ T9552] ? sendmsg_copy_msghdr+0x70/0x70 [ 88.215811][ T9552] ? __fget_files+0x329/0x4f0 [ 88.220491][ T9552] ? ksys_dup3+0x3c0/0x3c0 [ 88.225005][ T9552] ? __fget_light+0x208/0x270 [ 88.229713][ T9552] __sys_sendmsg+0xec/0x1b0 [ 88.234218][ T9552] ? __sys_sendmsg_sock+0xb0/0xb0 [ 88.239236][ T9552] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 88.245313][ T9552] ? __x64_sys_futex+0x380/0x4f0 [ 88.250286][ T9552] ? trace_hardirqs_off_caller+0x55/0x230 [ 88.256227][ T9552] ? do_syscall_64+0x21/0x7d0 [ 88.260894][ T9552] do_syscall_64+0xf6/0x7d0 [ 88.265489][ T9552] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.271798][ T9552] RIP: 0033:0x4472a9 [ 88.275690][ T9552] 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 [ 88.296938][ T9552] RSP: 002b:00007fed23099d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 88.305354][ T9552] RAX: ffffffffffffffda RBX: 00000000006dcc78 RCX: 00000000004472a9 [ 88.313438][ T9552] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 88.321583][ T9552] RBP: 00000000006dcc70 R08: 0000000000000000 R09: 0000000000000000 [ 88.329559][ T9552] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc7c [ 88.337884][ T9552] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 88.347643][ T9552] Kernel Offset: disabled [ 88.352142][ T9552] Rebooting in 86400 seconds..