[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.93' (ECDSA) to the list of known hosts.
syzkaller login: [ 610.519816][ T26] audit: type=1400 audit(1599282458.713:8): avc: denied { execmem } for pid=6839 comm="syz-executor784" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[ 610.541939][ T6840] IPVS: ftp: loaded support on port[0] = 21
[ 610.646780][ T6840] chnl_net:caif_netlink_parms(): no params data found
[ 610.700305][ T6840] bridge0: port 1(bridge_slave_0) entered blocking state
[ 610.707828][ T6840] bridge0: port 1(bridge_slave_0) entered disabled state
[ 610.715665][ T6840] device bridge_slave_0 entered promiscuous mode
[ 610.724780][ T6840] bridge0: port 2(bridge_slave_1) entered blocking state
[ 610.733311][ T6840] bridge0: port 2(bridge_slave_1) entered disabled state
[ 610.741281][ T6840] device bridge_slave_1 entered promiscuous mode
[ 610.762475][ T6840] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 610.773458][ T6840] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 610.796008][ T6840] team0: Port device team_slave_0 added
[ 610.803313][ T6840] team0: Port device team_slave_1 added
[ 610.821745][ T6840] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 610.828764][ T6840] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 610.854698][ T6840] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 610.867183][ T6840] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 610.874190][ T6840] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 610.900118][ T6840] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 610.928526][ T6840] device hsr_slave_0 entered promiscuous mode
[ 610.935145][ T6840] device hsr_slave_1 entered promiscuous mode
[ 611.040339][ T6840] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 611.051973][ T6840] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 611.061453][ T6840] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 611.071506][ T6840] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 611.096399][ T6840] bridge0: port 2(bridge_slave_1) entered blocking state
[ 611.103553][ T6840] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 611.111309][ T6840] bridge0: port 1(bridge_slave_0) entered blocking state
[ 611.118439][ T6840] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 611.164525][ T6840] 8021q: adding VLAN 0 to HW filter on device bond0
[ 611.178487][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 611.190761][ T17] bridge0: port 1(bridge_slave_0) entered disabled state
[ 611.198645][ T17] bridge0: port 2(bridge_slave_1) entered disabled state
[ 611.206356][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 611.219644][ T6840] 8021q: adding VLAN 0 to HW filter on device team0
[ 611.231047][ T2617] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 611.239690][ T2617] bridge0: port 1(bridge_slave_0) entered blocking state
[ 611.246729][ T2617] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 611.268571][ T2617] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 611.276834][ T2617] bridge0: port 2(bridge_slave_1) entered blocking state
[ 611.283922][ T2617] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 611.293089][ T2617] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 611.312805][ T6840] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 611.323506][ T6840] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 611.336561][ T7052] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 611.344871][ T7052] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 611.353763][ T7052] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 611.364307][ T7052] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 611.375072][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 611.396302][ T6840] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 611.403722][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[ 611.411487][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[ 611.432758][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready
[ 611.452421][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
[ 611.460762][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
[ 611.469410][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
[ 611.481463][ T6840] device veth0_vlan entered promiscuous mode
[ 611.493117][ T6840] device veth1_vlan entered promiscuous mode
[ 611.515312][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready
[ 611.523486][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready
[ 611.531871][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
[ 611.543085][ T6840] device veth0_macvtap entered promiscuous mode
[ 611.553723][ T6840] device veth1_macvtap entered promiscuous mode
[ 611.572144][ T6840] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 611.579864][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
[ 611.590837][ T6970] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
[ 611.602603][ T6840] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 611.610697][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
[ 611.623079][ T6840] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
executing program
[ 611.632164][ T6840] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 611.642965][ T6840] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 611.652374][ T6840] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 611.697319][ C1] hrtimer: interrupt took 3176720 ns
[ 648.258753][ T2516] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 753.184810][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 753.185125][ C0] rcu: 1-...0: (1 GPs behind) idle=2e2/1/0x4000000000000000 softirq=8639/8646 fqs=5250
[ 753.185257][ C0] (detected by 0, t=10502 jiffies, g=10573, q=113)
[ 753.185269][ C0] Sending NMI from CPU 0 to CPUs 1:
[ 753.187484][ C0] NMI backtrace for cpu 1
[ 753.187492][ C0] CPU: 1 PID: 2516 Comm: kworker/u4:4 Not tainted 5.9.0-rc3-syzkaller #0
[ 753.187500][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 753.187505][ C0] Workqueue: netns cleanup_net
[ 753.187512][ C0] RIP: 0010:rb_erase+0x0/0x1210
[ 753.187528][ C0] Code: 08 4c 8b 04 24 e9 1f f6 ff ff e8 fb f1 00 fe 48 8b 54 24 08 4c 8b 04 24 e9 f7 f5 ff ff 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <48> b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 49 89 fd
[ 753.187533][ C0] RSP: 0018:ffffc90000da8db8 EFLAGS: 00000046
[ 753.187543][ C0] RAX: 0000000000010002 RBX: ffff88808ed3fb40 RCX: 1ffff11015ce4f13
[ 753.187549][ C0] RDX: ffff88809fb66540 RSI: ffff8880ae727890 RDI: ffff88808ed3fb40
[ 753.187556][ C0] RBP: ffff8880ae727890 R08: 0000000000000000 R09: ffffffff8ab2640f
[ 753.187563][ C0] R10: ffff888099a68400 R11: 0000000000000001 R12: ffff8880ae727898
[ 753.187570][ C0] R13: ffff8880ae727840 R14: ffff88808ed3fb40 R15: dffffc0000000000
[ 753.187577][ C0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
[ 753.187583][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 753.187589][ C0] CR2: 0000000020000610 CR3: 0000000009a8d000 CR4: 00000000001506e0
[ 753.187596][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 753.187603][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 753.187606][ C0] Call Trace:
[ 753.187609][ C0]
[ 753.187613][ C0] timerqueue_del+0x7f/0x140
[ 753.187618][ C0] __hrtimer_run_queues+0x518/0xfc0
[ 753.187623][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80
[ 753.187629][ C0] ? ktime_get_update_offsets_now+0x1c4/0x250
[ 753.187633][ C0] hrtimer_interrupt+0x32a/0x930
[ 753.187639][ C0] __sysvec_apic_timer_interrupt+0x142/0x5e0
[ 753.187643][ C0] asm_call_on_stack+0xf/0x20
[ 753.187646][ C0]
[ 753.187651][ C0] sysvec_apic_timer_interrupt+0xb2/0xf0
[ 753.187656][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 753.187661][ C0] RIP: 0010:console_unlock+0xb4a/0xe60
[ 753.187676][ C0] Code: 89 48 c1 e8 03 42 80 3c 38 00 0f 85 18 03 00 00 48 83 3d a0 f8 58 08 00 0f 84 90 01 00 00 e8 4d 07 17 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 8b 5c 24 64 31 ff 89 de e8 b4 03 17 00 85 db 0f 84
[ 753.187681][ C0] RSP: 0018:ffffc90008797280 EFLAGS: 00000293
[ 753.187690][ C0] RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006
[ 753.187697][ C0] RDX: ffff88809fb66540 RSI: ffffffff815d43b3 RDI: 0000000000000293
[ 753.187704][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8c5f49e7
[ 753.187711][ C0] R10: fffffbfff18be93c R11: 00000000000808e8 R12: ffffffff84c29820
[ 753.187718][ C0] R13: 0000000000000073 R14: ffffffff8a3cb4b0 R15: dffffc0000000000
[ 753.187723][ C0] ? netconsole_netdev_event+0x2b0/0x2b0
[ 753.187728][ C0] ? console_unlock+0xb43/0xe60
[ 753.187732][ C0] vprintk_emit+0x2ff/0x740
[ 753.187736][ C0] dev_vprintk_emit+0x3eb/0x436
[ 753.187741][ C0] ? dev_attr_show.cold+0x3a/0x3a
[ 753.187745][ C0] ? __bfs+0x205/0x530
[ 753.187749][ C0] ? check_irq_usage+0x146/0xb40
[ 753.187754][ C0] dev_printk_emit+0xba/0xf1
[ 753.187758][ C0] ? dev_vprintk_emit+0x436/0x436
[ 753.187762][ C0] ? __bfs+0x75/0x530
[ 753.187766][ C0] ? mark_lock+0xbc/0x1710
[ 753.187771][ C0] __netdev_printk+0x1c6/0x27a
[ 753.187775][ C0] netdev_info+0xd7/0x109
[ 753.187779][ C0] ? netdev_notice+0x109/0x109
[ 753.187784][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530
[ 753.187790][ C0] nsim_udp_tunnel_unset_port.cold+0x179/0x1c8
[ 753.187796][ C0] __udp_tunnel_nic_device_sync.part.0+0xa50/0xcb0
[ 753.187801][ C0] ? __udp_tunnel_nic_dump_write+0x620/0x620
[ 753.187806][ C0] ? ib_register_client+0x300/0x300
[ 753.187811][ C0] ? udp_tunnel_nic_entry_adj+0x1a4/0x210
[ 753.187816][ C0] udp_tunnel_nic_flush+0x24c/0x560
[ 753.187821][ C0] udp_tunnel_nic_netdevice_event+0x7c5/0xfcf
[ 753.187826][ C0] ? _raw_spin_unlock_irqrestore+0x5c/0x90
[ 753.187831][ C0] ? netconsole_netdev_event+0x20c/0x2b0
[ 753.187836][ C0] notifier_call_chain+0xb5/0x200
[ 753.187840][ C0] call_netdevice_notifiers_info+0xb5/0x130
[ 753.187846][ C0] rollback_registered_many+0x768/0x1210
[ 753.187850][ C0] ? __mutex_lock+0x626/0x10e0
[ 753.187855][ C0] ? netdev_pick_tx+0xb00/0xb00
[ 753.187860][ C0] ? mutex_lock_io_nested+0xf60/0xf60
[ 753.187865][ C0] unregister_netdevice_queue+0x2dd/0x570
[ 753.187870][ C0] ? check_preemption_disabled+0x50/0x130
[ 753.187875][ C0] ? unregister_netdevice_many+0x50/0x50
[ 753.187879][ C0] nsim_destroy+0x35/0x70
[ 753.187884][ C0] __nsim_dev_port_del+0x144/0x1e0
[ 753.187889][ C0] nsim_dev_reload_destroy+0xff/0x1e0
[ 753.187894][ C0] nsim_dev_reload_down+0x6e/0xd0
[ 753.187898][ C0] devlink_reload+0xc1/0x3a0
[ 753.187903][ C0] devlink_pernet_pre_exit+0xfb/0x190
[ 753.187908][ C0] ? devlink_nl_cmd_reload+0x820/0x820
[ 753.187912][ C0] cleanup_net+0x451/0xa00
[ 753.187917][ C0] ? ops_free_list.part.0+0x3d0/0x3d0
[ 753.187921][ C0] ? lock_is_held_type+0xbb/0xf0
[ 753.187926][ C0] process_one_work+0x94c/0x1670
[ 753.187930][ C0] ? lock_release+0x8f0/0x8f0
[ 753.187935][ C0] ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[ 753.187940][ C0] ? rwlock_bug.part.0+0x90/0x90
[ 753.187945][ C0] ? lockdep_hardirqs_off+0x96/0xd0
[ 753.187949][ C0] worker_thread+0x64c/0x1120
[ 753.187954][ C0] ? process_one_work+0x1670/0x1670
[ 753.187958][ C0] kthread+0x3b5/0x4a0
[ 753.187963][ C0] ? __kthread_bind_mask+0xc0/0xc0
[ 753.187967][ C0] ret_from_fork+0x1f/0x30
[ 753.187975][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs
[ 762.214672][ T1168] INFO: task syz-executor784:6840 blocked for more than 143 seconds.
[ 762.214696][ T1168] Not tainted 5.9.0-rc3-syzkaller #0
[ 762.214703][ T1168] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 762.214710][ T1168] task:syz-executor784 state:D stack:24296 pid: 6840 ppid: 6839 flags:0x80004002
[ 762.214734][ T1168] Call Trace:
[ 762.214759][ T1168] __schedule+0xea9/0x2230
[ 762.214784][ T1168] ? io_schedule_timeout+0x140/0x140
[ 762.214810][ T1168] schedule+0xd0/0x2a0
[ 762.214829][ T1168] schedule_timeout+0x1d8/0x250
[ 762.214845][ T1168] ? usleep_range+0x170/0x170
[ 762.214867][ T1168] ? mark_held_locks+0x9f/0xe0
[ 762.214884][ T1168] ? _raw_spin_unlock_irq+0x1f/0x80
[ 762.214899][ T1168] ? lockdep_hardirqs_on_prepare+0x354/0x530
[ 762.214913][ T1168] ? _raw_spin_unlock_irq+0x1f/0x80
[ 762.214949][ T1168] wait_for_completion+0x163/0x260
[ 762.214971][ T1168] ? wait_for_completion_interruptible+0x2e0/0x2e0
[ 762.214993][ T1168] ? lock_is_held_type+0xbb/0xf0
[ 762.215073][ T1168] rcu_barrier+0x2d1/0x4f0
[ 762.215095][ T1168] netdev_run_todo+0x100/0xac0
[ 762.215142][ T1168] ? sk_destruct+0xbd/0xe0
[ 762.215159][ T1168] ? __sk_free+0xef/0x3d0
[ 762.215177][ T1168] ? generic_xdp_install+0x700/0x700
[ 762.215199][ T1168] ? lock_is_held_type+0xbb/0xf0
[ 762.215249][ T1168] tun_chr_close+0xf5/0x180
[ 762.215319][ T1168] __fput+0x285/0x920
[ 762.215335][ T1168] ? __tun_detach+0x1310/0x1310
[ 762.215356][ T1168] task_work_run+0xdd/0x190
[ 762.215401][ T1168] do_exit+0xb7d/0x29f0
[ 762.215427][ T1168] ? pick_file+0x129/0x1e0
[ 762.215447][ T1168] ? mm_update_next_owner+0x7a0/0x7a0
[ 762.215460][ T1168] ? do_raw_spin_lock+0x120/0x2b0
[ 762.215475][ T1168] ? rwlock_bug.part.0+0x90/0x90
[ 762.215523][ T1168] ? __blkcg_punt_bio_submit+0x1d0/0x1d0
[ 762.215543][ T1168] ? lock_is_held_type+0xbb/0xf0
[ 762.215590][ T1168] do_group_exit+0x125/0x310
[ 762.215616][ T1168] __x64_sys_exit_group+0x3a/0x50
[ 762.215631][ T1168] do_syscall_64+0x2d/0x70
[ 762.215646][ T1168] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 762.215658][ T1168] RIP: 0033:0x442d98
[ 762.215664][ T1168] Code: Bad RIP value.
[ 762.215673][ T1168] RSP: 002b:00007ffeccbbbd78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 762.215689][ T1168] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000442d98
[ 762.215698][ T1168] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[ 762.215708][ T1168] RBP: 00000000004c9cb0 R08: 00000000000000e7 R09: ffffffffffffffd0
[ 762.215717][ T1168] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000001
[ 762.215727][ T1168] R13: 00000000006dca60 R14: 0000000000000000 R15: 0000000000000000
[ 762.215757][ T1168]
[ 762.215757][ T1168] Showing all locks held in the system:
[ 762.215770][ T1168] 1 lock held by khungtaskd/1168:
[ 762.215775][ T1168] #0: ffffffff89bd6a40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
[ 762.215818][ T1168] 3 locks held by kworker/1:2/2462:
[ 762.215823][ T1168] #0: ffff888099988d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670
[ 762.215855][ T1168] #1: ffffc90008627da8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670
[ 762.215885][ T1168] #2: ffffffff8a7e9f88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1280
[ 762.215984][ T1168] 7 locks held by kworker/u4:4/2516:
[ 762.216006][ T1168] 1 lock held by in:imklog/6519:
[ 762.216012][ T1168] #0: ffff8880986473f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[ 762.216046][ T1168] 1 lock held by syz-executor784/6840:
[ 762.216051][ T1168] #0: ffffffff89bdafb0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x4f0
[ 762.216083][ T1168] 3 locks held by kworker/0:0/6970:
[ 762.216089][ T1168] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670
[ 762.216117][ T1168] #1: ffffc9000607fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670
[ 762.216147][ T1168] #2: ffffffff8a7e9f88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60
[ 762.216180][ T1168] 3 locks held by kworker/0:3/7052:
[ 762.216185][ T1168] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670
[ 762.216214][ T1168] #1: ffffc90005747da8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670
[ 762.216245][ T1168] #2: ffff88809ee54370 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x5d/0xbe0
[ 762.216277][ T1168]
[ 762.216283][ T1168] =============================================
[ 762.216283][ T1168]
[ 762.216290][ T1168] NMI backtrace for cpu 0
[ 762.216304][ T1168] CPU: 0 PID: 1168 Comm: khungtaskd Not tainted 5.9.0-rc3-syzkaller #0
[ 762.216312][ T1168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 762.216317][ T1168] Call Trace:
[ 762.216333][ T1168] dump_stack+0x198/0x1fd
[ 762.216351][ T1168] nmi_cpu_backtrace.cold+0x70/0xb1
[ 762.216368][ T1168] ? lapic_can_unplug_cpu.cold+0x38/0x38
[ 762.216382][ T1168] nmi_trigger_cpumask_backtrace+0x1b3/0x223
[ 762.216426][ T1168] watchdog+0xd7d/0x1000
[ 762.216445][ T1168] ? reset_hung_task_detector+0x30/0x30
[ 762.216460][ T1168] kthread+0x3b5/0x4a0
[ 762.216473][ T1168] ? __kthread_bind_mask+0xc0/0xc0
[ 762.216491][ T1168] ret_from_fork+0x1f/0x30
[ 762.216516][ T1168] Sending NMI from CPU 0 to CPUs 1:
[ 762.217694][ T1168] NMI backtrace for cpu 1
[ 762.217702][ T1168] CPU: 1 PID: 2516 Comm: kworker/u4:4 Not tainted 5.9.0-rc3-syzkaller #0
[ 762.217710][ T1168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 762.217714][ T1168] Workqueue: netns cleanup_net
[ 762.217722][ T1168] RIP: 0010:__lock_acquire+0xd89/0x5570
[ 762.217737][ T1168] Code: 6c 24 68 e8 29 5c 9a 06 85 c0 0f 85 18 05 00 00 45 31 ff 48 b8 00 00 00 00 00 fc ff df 48 8b 5c 24 20 48 c7 04 03 00 00 00 00 <48> 8b 84 24 e8 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 d1 2a 00
[ 762.217742][ T1168] RSP: 0018:ffffc90000da8b90 EFLAGS: 00000097
[ 762.217752][ T1168] RAX: dffffc0000000000 RBX: 1ffff920001b5184 RCX: ffffffff815a184b
[ 762.217759][ T1168] RDX: 1ffff11013f6cdc4 RSI: 0000000000000001 RDI: ffffffff8bf81f78
[ 762.217765][ T1168] RBP: ffff88809fb66f40 R08: 0000000000000000 R09: ffffffff8c5f49ef
[ 762.217772][ T1168] R10: fffffbfff18be93d R11: 0000000000000001 R12: ffffffff8bf81f60
[ 762.217779][ T1168] R13: dffffc0000000000 R14: ffff88809fb66540 R15: 0000000000000001
[ 762.217786][ T1168] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
[ 762.217791][ T1168] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 762.217798][ T1168] CR2: 0000000020000610 CR3: 0000000009a8d000 CR4: 00000000001506e0
[ 762.217805][ T1168] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 762.217811][ T1168] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 762.217814][ T1168] Call Trace:
[ 762.217817][ T1168]
[ 762.217822][ T1168] ? lockdep_hardirqs_on_prepare+0x530/0x530
[ 762.217827][ T1168] ? lock_is_held_type+0xbb/0xf0
[ 762.217831][ T1168] lock_acquire+0x1f3/0xae0
[ 762.217836][ T1168] ? __hrtimer_run_queues+0x252/0xfc0
[ 762.217840][ T1168] ? lock_release+0x8f0/0x8f0
[ 762.217844][ T1168] ? advance_sched+0x56d/0x990
[ 762.217849][ T1168] _raw_spin_lock_irq+0x94/0xd0
[ 762.217853][ T1168] ? __hrtimer_run_queues+0x252/0xfc0
[ 762.217858][ T1168] __hrtimer_run_queues+0x252/0xfc0
[ 762.217863][ T1168] ? hrtimer_sleeper_start_expires+0x80/0x80
[ 762.217868][ T1168] ? ktime_get_update_offsets_now+0x1c4/0x250
[ 762.217873][ T1168] hrtimer_interrupt+0x32a/0x930
[ 762.217878][ T1168] __sysvec_apic_timer_interrupt+0x142/0x5e0
[ 762.217882][ T1168] asm_call_on_stack+0xf/0x20
[ 762.217885][ T1168]
[ 762.217890][ T1168] sysvec_apic_timer_interrupt+0xb2/0xf0
[ 762.217895][ T1168] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 762.217900][ T1168] RIP: 0010:console_unlock+0xb4a/0xe60
[ 762.217915][ T1168] Code: 89 48 c1 e8 03 42 80 3c 38 00 0f 85 18 03 00 00 48 83 3d a0 f8 58 08 00 0f 84 90 01 00 00 e8 4d 07 17 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 8b 5c 24 64 31 ff 89 de e8 b4 03 17 00 85 db 0f 84
[ 762.217920][ T1168] RSP: 0018:ffffc90008797280 EFLAGS: 00000293
[ 762.217930][ T1168] RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006
[ 762.217936][ T1168] RDX: ffff88809fb66540 RSI: ffffffff815d43b3 RDI: 0000000000000293
[ 762.217943][ T1168] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8c5f49e7
[ 762.217950][ T1168] R10: fffffbfff18be93c R11: 00000000000808e8 R12: ffffffff84c29820
[ 762.217956][ T1168] R13: 0000000000000073 R14: ffffffff8a3cb4b0 R15: dffffc0000000000
[ 762.217961][ T1168] ? netconsole_netdev_event+0x2b0/0x2b0
[ 762.217965][ T1168] ? console_unlock+0xb43/0xe60
[ 762.217970][ T1168] vprintk_emit+0x2ff/0x740
[ 762.217974][ T1168] dev_vprintk_emit+0x3eb/0x436
[ 762.217979][ T1168] ? dev_attr_show.cold+0x3a/0x3a
[ 762.217982][ T1168] ? __bfs+0x205/0x530
[ 762.217987][ T1168] ? check_irq_usage+0x146/0xb40
[ 762.217991][ T1168] dev_printk_emit+0xba/0xf1
[ 762.217996][ T1168] ? dev_vprintk_emit+0x436/0x436
[ 762.217999][ T1168] ? __bfs+0x75/0x530
[ 762.218003][ T1168] ? mark_lock+0xbc/0x1710
[ 762.218008][ T1168] __netdev_printk+0x1c6/0x27a
[ 762.218012][ T1168] netdev_info+0xd7/0x109
[ 762.218016][ T1168] ? netdev_notice+0x109/0x109
[ 762.218021][ T1168] ? lockdep_hardirqs_on_prepare+0x530/0x530
[ 762.218027][ T1168] nsim_udp_tunnel_unset_port.cold+0x179/0x1c8
[ 762.218032][ T1168] __udp_tunnel_nic_device_sync.part.0+0xa50/0xcb0
[ 762.218038][ T1168] ? __udp_tunnel_nic_dump_write+0x620/0x620
[ 762.218042][ T1168] ? ib_register_client+0x300/0x300
[ 762.218047][ T1168] ? udp_tunnel_nic_entry_adj+0x1a4/0x210
[ 762.218052][ T1168] udp_tunnel_nic_flush+0x24c/0x560
[ 762.218057][ T1168] udp_tunnel_nic_netdevice_event+0x7c5/0xfcf
[ 762.218062][ T1168] ? _raw_spin_unlock_irqrestore+0x5c/0x90
[ 762.218067][ T1168] ? netconsole_netdev_event+0x20c/0x2b0
[ 762.218072][ T1168] notifier_call_chain+0xb5/0x200
[ 762.218077][ T1168] call_netdevice_notifiers_info+0xb5/0x130
[ 762.218082][ T1168] rollback_registered_many+0x768/0x1210
[ 762.218086][ T1168] ? __mutex_lock+0x626/0x10e0
[ 762.218090][ T1168] ? netdev_pick_tx+0xb00/0xb00
[ 762.218095][ T1168] ? mutex_lock_io_nested+0xf60/0xf60
[ 762.218100][ T1168] unregister_netdevice_queue+0x2dd/0x570
[ 762.218104][ T1168] ? check_preemption_disabled+0x50/0x130
[ 762.218109][ T1168] ? unregister_netdevice_many+0x50/0x50
[ 762.218113][ T1168] nsim_destroy+0x35/0x70
[ 762.218118][ T1168] __nsim_dev_port_del+0x144/0x1e0
[ 762.218123][ T1168] nsim_dev_reload_destroy+0xff/0x1e0
[ 762.218127][ T1168] nsim_dev_reload_down+0x6e/0xd0
[ 762.218131][ T1168] devlink_reload+0xc1/0x3a0
[ 762.218136][ T1168] devlink_pernet_pre_exit+0xfb/0x190
[ 762.218141][ T1168] ? devlink_nl_cmd_reload+0x820/0x820
[ 762.218145][ T1168] cleanup_net+0x451/0xa00
[ 762.218150][ T1168] ? ops_free_list.part.0+0x3d0/0x3d0
[ 762.218154][ T1168] ? lock_is_held_type+0xbb/0xf0
[ 762.218159][ T1168] process_one_work+0x94c/0x1670
[ 762.218163][ T1168] ? lock_release+0x8f0/0x8f0
[ 762.218168][ T1168] ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[ 762.218172][ T1168] ? rwlock_bug.part.0+0x90/0x90
[ 762.218177][ T1168] ? lockdep_hardirqs_off+0x96/0xd0
[ 762.218181][ T1168] worker_thread+0x64c/0x1120
[ 762.218186][ T1168] ? process_one_work+0x1670/0x1670
[ 762.218190][ T1168] kthread+0x3b5/0x4a0
[ 762.218194][ T1168] ? __kthread_bind_mask+0xc0/0xc0
[ 762.218198][ T1168] ret_from_fork+0x1f/0x30
[ 762.218207][ T1168] Kernel panic - not syncing: hung_task: blocked tasks
[ 762.218219][ T1168] CPU: 0 PID: 1168 Comm: khungtaskd Not tainted 5.9.0-rc3-syzkaller #0
[ 762.218234][ T1168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 762.218239][ T1168] Call Trace:
[ 762.218254][ T1168] dump_stack+0x198/0x1fd
[ 762.218305][ T1168] panic+0x347/0x7c0
[ 762.218320][ T1168] ? __warn_printk+0xf3/0xf3
[ 762.218338][ T1168] ? cpumask_next+0x3c/0x40
[ 762.218352][ T1168] ? printk_safe_flush+0xd6/0x120
[ 762.218364][ T1168] ? watchdog.cold+0x5/0x16b
[ 762.218376][ T1168] ? watchdog+0xa82/0x1000
[ 762.218393][ T1168] watchdog.cold+0x16/0x16b
[ 762.218411][ T1168] ? reset_hung_task_detector+0x30/0x30
[ 762.218426][ T1168] kthread+0x3b5/0x4a0
[ 762.218439][ T1168] ? __kthread_bind_mask+0xc0/0xc0
[ 762.218455][ T1168] ret_from_fork+0x1f/0x30
[ 763.328574][ T1168] Shutting down cpus with NMI
[ 763.329764][ T1168] Kernel Offset: disabled
[ 765.075732][ T1168] Rebooting in 86400 seconds..