Warning: Permanently added '10.128.1.15' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 29.287900] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 29.300164] IPVS: ftp: loaded support on port[0] = 21
executing program
executing program
[ 29.379808] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 29.391035] IPVS: ftp: loaded support on port[0] = 21
[ 29.429858] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 29.477967]
[ 29.479608] ======================================================
[ 29.486020] WARNING: possible circular locking dependency detected
[ 29.492407] 4.14.226-syzkaller #0 Not tainted
[ 29.497704] ------------------------------------------------------
[ 29.504019] kworker/u4:1/22 is trying to acquire lock:
[ 29.509441] (&table[i].mutex){+.+.}, at: [<ffffffff85edfd0d>] nf_tables_netdev_event+0x10d/0x4d0
[ 29.518457]
[ 29.518457] but task is already holding lock:
[ 29.524404] (rtnl_mutex){+.+.}, at: [<ffffffff8648e8d0>] ip6gre_exit_net+0x70/0x570
[ 29.532367]
[ 29.532367] which lock already depends on the new lock.
[ 29.532367]
[ 29.540654]
[ 29.540654] the existing dependency chain (in reverse order) is:
[ 29.548510]
[ 29.548510] -> #2 (rtnl_mutex){+.+.}:
[ 29.553769] __mutex_lock+0xc4/0x1310
[ 29.558067] unregister_netdevice_notifier+0x5e/0x2b0
[ 29.563754] tee_tg_destroy+0x5c/0xb0
[ 29.568049] cleanup_entry+0x232/0x310
[ 29.572431] __do_replace+0x38d/0x580
[ 29.576730] do_ip6t_set_ctl+0x256/0x3b0
[ 29.581305] nf_setsockopt+0x5f/0xb0
[ 29.585514] ipv6_setsockopt+0xc0/0x120
[ 29.589984] tcp_setsockopt+0x7b/0xc0
[ 29.594280] SyS_setsockopt+0x110/0x1e0
[ 29.598773] do_syscall_64+0x1d5/0x640
[ 29.603178] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 29.608859]
[ 29.608859] -> #1 (&xt[i].mutex){+.+.}:
[ 29.614291] __mutex_lock+0xc4/0x1310
[ 29.618587] match_revfn+0x43/0x210
[ 29.622708] xt_find_revision+0x8d/0x1d0
[ 29.627629] nfnl_compat_get+0x1f7/0x870
[ 29.632195] nfnetlink_rcv_msg+0x9bb/0xc00
[ 29.636924] netlink_rcv_skb+0x125/0x390
[ 29.641582] nfnetlink_rcv+0x1ab/0x1da0
[ 29.646056] netlink_unicast+0x437/0x610
[ 29.650832] netlink_sendmsg+0x62e/0xb80
[ 29.655391] sock_sendmsg+0xb5/0x100
[ 29.659611] ___sys_sendmsg+0x6c8/0x800
[ 29.664085] __sys_sendmsg+0xa3/0x120
[ 29.668901] SyS_sendmsg+0x27/0x40
[ 29.672940] do_syscall_64+0x1d5/0x640
[ 29.677343] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 29.683026]
[ 29.683026] -> #0 (&table[i].mutex){+.+.}:
[ 29.688723] lock_acquire+0x170/0x3f0
[ 29.693022] __mutex_lock+0xc4/0x1310
[ 29.697335] nf_tables_netdev_event+0x10d/0x4d0
[ 29.702500] notifier_call_chain+0x108/0x1a0
[ 29.707404] rollback_registered_many+0x765/0xba0
[ 29.712742] unregister_netdevice_many.part.0+0x18/0x2e0
[ 29.718791] unregister_netdevice_many+0x36/0x50
[ 29.724130] ip6gre_exit_net+0x41e/0x570
[ 29.728686] ops_exit_list+0xa5/0x150
[ 29.733155] cleanup_net+0x3b3/0x840
[ 29.737383] process_one_work+0x793/0x14a0
[ 29.742121] worker_thread+0x5cc/0xff0
[ 29.746524] kthread+0x30d/0x420
[ 29.750388] ret_from_fork+0x24/0x30
[ 29.754605]
[ 29.754605] other info that might help us debug this:
[ 29.754605]
[ 29.762738] Chain exists of:
[ 29.762738] &table[i].mutex --> &xt[i].mutex --> rtnl_mutex
[ 29.762738]
[ 29.772954] Possible unsafe locking scenario:
[ 29.772954]
[ 29.778987] CPU0 CPU1
[ 29.783627] ---- ----
[ 29.788281] lock(rtnl_mutex);
[ 29.791535] lock(&xt[i].mutex);
[ 29.797652] lock(rtnl_mutex);
[ 29.803439] lock(&table[i].mutex);
[ 29.807492]
[ 29.807492] *** DEADLOCK ***
[ 29.807492]
[ 29.814047] 4 locks held by kworker/u4:1/22:
[ 29.819082] #0: ("%s""netns"){+.+.}, at: [<ffffffff81363810>] process_one_work+0x6b0/0x14a0
[ 29.828048] #1: (net_cleanup_work){+.+.}, at: [<ffffffff81363846>] process_one_work+0x6e6/0x14a0
[ 29.837405] #2: (net_mutex){+.+.}, at: [<ffffffff85bfab70>] cleanup_net+0x110/0x840
[ 29.845546] #3: (rtnl_mutex){+.+.}, at: [<ffffffff8648e8d0>] ip6gre_exit_net+0x70/0x570
[ 29.853866]
[ 29.853866] stack backtrace:
[ 29.858427] CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.226-syzkaller #0
[ 29.866021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 29.875356] Workqueue: netns cleanup_net
[ 29.879408] Call Trace:
[ 29.881983] dump_stack+0x1b2/0x281
[ 29.885586] print_circular_bug.constprop.0.cold+0x2d7/0x41e
[ 29.891554] __lock_acquire+0x2e0e/0x3f20
[ 29.895703] ? unwind_next_frame+0x404/0x17d0
[ 29.900194] ? trace_hardirqs_on+0x10/0x10
[ 29.904418] ? check_usage_forwards+0x2d0/0x2d0
[ 29.909069] ? ret_from_fork+0x24/0x30
[ 29.912934] lock_acquire+0x170/0x3f0
[ 29.916729] ? nf_tables_netdev_event+0x10d/0x4d0
[ 29.921570] ? nf_tables_netdev_event+0x10d/0x4d0
[ 29.926389] __mutex_lock+0xc4/0x1310
[ 29.930166] ? nf_tables_netdev_event+0x10d/0x4d0
[ 29.935003] ? nf_tables_netdev_event+0x10d/0x4d0
[ 29.939822] ? __ww_mutex_wakeup_for_backoff+0x210/0x210
[ 29.945249] ? trace_hardirqs_on+0x10/0x10
[ 29.949461] ? trace_hardirqs_on_caller+0x3a8/0x580
[ 29.954454] ? lock_downgrade+0x740/0x740
[ 29.958856] nf_tables_netdev_event+0x10d/0x4d0
[ 29.964111] ? mirred_device_event+0x12f/0x170
[ 29.968674] ? nf_tables_netdev_init_net+0x140/0x140
[ 29.973848] ? mirred_device_event+0x12f/0x170
[ 29.978421] ? __local_bh_enable_ip+0xc1/0x170
[ 29.982988] notifier_call_chain+0x108/0x1a0
[ 29.987380] rollback_registered_many+0x765/0xba0
[ 29.992211] ? __ww_mutex_wakeup_for_backoff+0x210/0x210
[ 29.997647] ? netdev_state_change+0xf0/0xf0
[ 30.002044] ? lock_acquire+0x170/0x3f0
[ 30.005998] unregister_netdevice_many.part.0+0x18/0x2e0
[ 30.011431] unregister_netdevice_many+0x36/0x50
[ 30.016164] ip6gre_exit_net+0x41e/0x570
[ 30.020200] ? lock_downgrade+0x740/0x740
[ 30.024324] ? ip6gre_dellink+0x260/0x260
[ 30.028451] ? ip6gre_dellink+0x260/0x260
[ 30.032639] ops_exit_list+0xa5/0x150
[ 30.036420] cleanup_net+0x3b3/0x840
[ 30.040134] ? net_drop_ns+0x70/0x70
[ 30.043834] ? lock_acquire+0x170/0x3f0
[ 30.047786] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 30.053215] process_one_work+0x793/0x14a0
[ 30.057430] ? work_busy+0x320/0x320
[ 30.061127] ? worker_thread+0x158/0xff0
[ 30.065339] ? _raw_spin_unlock_irq+0x24/0x80
[ 30.069816] worker_thread+0x5cc/0xff0
[ 30.073705] ? rescuer_thread+0xc80/0xc80
[ 30.077846] kthread+0x30d/0x420
[ 30.081191] ? kthread_create_on_node+0xd0/0xd0
[ 30.087750] ret_from_fork+0x24/0x30
executing program
[ 30.684279] IPVS: ftp: loaded support on port[0] = 21
[ 30.714780] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
executing program
[ 31.352192] IPVS: ftp: loaded support on port[0] = 21
[ 31.382675] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 31.393257] IPVS: ftp: loaded support on port[0] = 21
[ 31.427030] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
executing program
[ 32.082141] IPVS: ftp: loaded support on port[0] = 21
[ 32.113556] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 32.124971] IPVS: ftp: loaded support on port[0] = 21
[ 32.159524] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 33.298188] IPVS: ftp: loaded support on port[0] = 21
[ 33.331274] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 34.425376] IPVS: ftp: loaded support on port[0] = 21
[ 34.456075] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 35.078925] IPVS: ftp: loaded support on port[0] = 21
executing program
[ 35.108764] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 35.119180] IPVS: ftp: loaded support on port[0] = 21
[ 35.152670] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
executing program
[ 35.808609] IPVS: ftp: loaded support on port[0] = 21
[ 35.839580] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 35.850121] IPVS: ftp: loaded support on port[0] = 21
[ 35.883424] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 36.976165] IPVS: ftp: loaded support on port[0] = 21
executing program
[ 37.006794] ip6_tables: ip6tables: counters copy to user failed while replacing table
[ 37.017206] IPVS: ftp: loaded support on port[0] = 21
[ 37.050433] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 38.094211] IPVS: ftp: loaded support on port[0] = 21
[ 38.124926] ip6_tables: ip6tables: counters copy to user failed while replacing table
executing program
[ 39.283958] IPVS: ftp: loaded support on port[0] = 21
[ 39.314863] ip6_tables: ip6tables: counters copy to user failed while replacing table