[  458.930442] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'.
[  458.943366] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'.
[  458.961265] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
[  458.972295] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'.
[  458.990480] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'.
[  459.001640] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'.
[  459.016188] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
[  459.030827] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'.
[  459.043962] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
[  459.054449] netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
[  461.842418] syz-executor.2 (5926) used greatest stack depth: 23392 bytes left
[  462.291986] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  462.298833] batman_adv: batadv0: Removing interface: batadv_slave_0
[  462.306326] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  462.313021] batman_adv: batadv0: Removing interface: batadv_slave_1
[  462.321114] device bridge_slave_1 left promiscuous mode
[  462.326836] bridge0: port 2(bridge_slave_1) entered disabled state
[  462.336981] device bridge_slave_0 left promiscuous mode
[  462.342444] bridge0: port 1(bridge_slave_0) entered disabled state
[  462.352182] device veth1_macvtap left promiscuous mode
[  462.357554] device veth0_macvtap left promiscuous mode
[  462.362917] device veth1_vlan left promiscuous mode
[  462.368168] device veth0_vlan left promiscuous mode
[  462.437611] team0 (unregistering): Port device team_slave_1 removed
[  462.450525] team0 (unregistering): Port device team_slave_0 removed
[  462.461119] bond0 (unregistering): Releasing backup interface bond_slave_1
[  462.473190] bond0 (unregistering): Releasing backup interface bond_slave_0
[  462.508525] bond0 (unregistering): Released all slaves
[  462.749145] ------------[ cut here ]------------
[  462.753902] WARNING: CPU: 1 PID: 2287 at net/netfilter/core.c:193 nf_unregister_net_hook+0x2d0/0x5a0
[  462.763809] nf_unregister_net_hook: hook not found!
[  462.769129] Kernel panic - not syncing: panic_on_warn set ...
[  462.769129] 
[  462.776473] CPU: 1 PID: 2287 Comm: kworker/u4:4 Not tainted 4.8.0-syzkaller #0
[  462.783889] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  462.793221] Workqueue: netns cleanup_net
[  462.797367]  ffff880123c2f890 ffffffff82ed65a2 ffffffff86285b80 ffff880123c2f968
[  462.805429]  ffffffff86aebf00 ffffffff84ee1270 0000000000000009 ffff880123c2f958
[  462.813417]  ffffffff8163dc22 0000000041b58ab3 ffffffff86fa7be0 ffffffff8163da6c
[  462.821437] Call Trace:
[  462.824005]  [<ffffffff82ed65a2>] dump_stack+0x136/0x1d4
[  462.829429]  [<ffffffff84ee1270>] ? nf_unregister_net_hook+0x2d0/0x5a0
[  462.836069]  [<ffffffff8163dc22>] panic+0x1b6/0x351
[  462.841059]  [<ffffffff8163da6c>] ? devm_memremap+0xec/0xec
[  462.846748]  [<ffffffff84ee1270>] ? nf_unregister_net_hook+0x2d0/0x5a0
[  462.853384]  [<ffffffff81349edd>] __warn+0x18d/0x1b0
[  462.858458]  [<ffffffff81453cce>] ? trace_hardirqs_on_caller+0x49e/0x5c0
[  462.865277]  [<ffffffff81349f92>] warn_slowpath_fmt+0x92/0xb0
[  462.871132]  [<ffffffff81349f00>] ? __warn+0x1b0/0x1b0
[  462.876377]  [<ffffffff84ee1270>] nf_unregister_net_hook+0x2d0/0x5a0
[  462.882901]  [<ffffffff84ee1666>] netfilter_net_exit+0x36/0xa0
[  462.888842]  [<ffffffff84cd7fce>] ops_exit_list.isra.0+0x8e/0x120
[  462.895077]  [<ffffffff84cda2d0>] cleanup_net+0x2d0/0x570
[  462.900588]  [<ffffffff84cda000>] ? net_drop_ns+0x60/0x60
[  462.906100]  [<ffffffff8149cf57>] ? debug_lockdep_rcu_enabled+0x77/0x90
[  462.912825]  [<ffffffff8139b65d>] process_one_work+0x67d/0x14d0
[  462.918853]  [<ffffffff8139b5b2>] ? process_one_work+0x5d2/0x14d0
[  462.925062]  [<ffffffff813c89b1>] ? finish_task_switch+0x151/0x630
[  462.931348]  [<ffffffff8139afe0>] ? cancel_delayed_work_sync+0x10/0x10
[  462.937989]  [<ffffffff8139c591>] worker_thread+0xe1/0x1050
[  462.943669]  [<ffffffff8139c4b0>] ? process_one_work+0x14d0/0x14d0
[  462.949960]  [<ffffffff813ad12e>] kthread+0x20e/0x2d0
[  462.955119]  [<ffffffff81453dfd>] ? trace_hardirqs_on+0xd/0x10
[  462.961078]  [<ffffffff813acf20>] ? kthread_park+0x80/0x80
[  462.966670]  [<ffffffff813acf20>] ? kthread_park+0x80/0x80
[  462.972266]  [<ffffffff813acf20>] ? kthread_park+0x80/0x80
[  462.977874]  [<ffffffff8601e39a>] ret_from_fork+0x2a/0x40
[  462.984814] Kernel Offset: disabled