[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.179' (ECDSA) to the list of known hosts. syzkaller login: [ 302.104655][ T6864] IPVS: ftp: loaded support on port[0] = 21 [ 302.196728][ T6864] chnl_net:caif_netlink_parms(): no params data found [ 302.247216][ T6864] bridge0: port 1(bridge_slave_0) entered blocking state [ 302.255094][ T6864] bridge0: port 1(bridge_slave_0) entered disabled state [ 302.263944][ T6864] device bridge_slave_0 entered promiscuous mode [ 302.273648][ T6864] bridge0: port 2(bridge_slave_1) entered blocking state [ 302.281305][ T6864] bridge0: port 2(bridge_slave_1) entered disabled state [ 302.289611][ T6864] device bridge_slave_1 entered promiscuous mode [ 302.308472][ T6864] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 302.320402][ T6864] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 302.342503][ T6864] team0: Port device team_slave_0 added [ 302.350455][ T6864] team0: Port device team_slave_1 added [ 302.369538][ T6864] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 302.376492][ T6864] 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. [ 302.403668][ T6864] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 302.416476][ T6864] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 302.423940][ T6864] 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. [ 302.450452][ T6864] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 302.477067][ T6864] device hsr_slave_0 entered promiscuous mode [ 302.483798][ T6864] device hsr_slave_1 entered promiscuous mode [ 302.576367][ T6864] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 302.586473][ T6864] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 302.598085][ T6864] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 302.608163][ T6864] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 302.634658][ T6864] bridge0: port 2(bridge_slave_1) entered blocking state [ 302.641843][ T6864] bridge0: port 2(bridge_slave_1) entered forwarding state [ 302.649686][ T6864] bridge0: port 1(bridge_slave_0) entered blocking state [ 302.656752][ T6864] bridge0: port 1(bridge_slave_0) entered forwarding state [ 302.701766][ T6864] 8021q: adding VLAN 0 to HW filter on device bond0 [ 302.715502][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 302.725607][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 302.734052][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 302.742826][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 302.755343][ T6864] 8021q: adding VLAN 0 to HW filter on device team0 [ 302.766944][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 302.776446][ T3914] bridge0: port 1(bridge_slave_0) entered blocking state [ 302.783576][ T3914] bridge0: port 1(bridge_slave_0) entered forwarding state [ 302.799233][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 302.807581][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 302.814700][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 302.831024][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 302.841870][ T6769] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 302.850681][ T6769] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 302.864215][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 302.877861][ T6864] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 302.890380][ T6864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 302.898342][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 302.919282][ T6769] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 302.926665][ T6769] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 302.938259][ T6864] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 302.958426][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 302.979977][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 302.988178][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 302.996575][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 303.004958][ T6864] device veth0_vlan entered promiscuous mode [ 303.017941][ T6864] device veth1_vlan entered promiscuous mode [ 303.037969][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 303.046521][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 303.055428][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 303.066749][ T6864] device veth0_macvtap entered promiscuous mode [ 303.076713][ T6864] device veth1_macvtap entered promiscuous mode [ 303.095242][ T6864] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 303.103644][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 303.113648][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 303.125262][ T6864] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 303.133796][ T6769] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 303.144988][ T6864] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 303.154065][ T6864] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 303.163427][ T6864] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 303.172493][ T6864] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 303.322656][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 312.360240][ T0] NOHZ: local_softirq_pending 08 [ 332.828166][ T0] NOHZ: local_softirq_pending 08 [ 353.306660][ T0] NOHZ: local_softirq_pending 08 [ 373.786015][ T0] NOHZ: local_softirq_pending 08 [ 435.223095][ T0] NOHZ: local_softirq_pending 08 [ 452.501691][ T1150] INFO: task syz-executor341:6864 blocked for more than 143 seconds. [ 452.510023][ T1150] Not tainted 5.9.0-rc2-syzkaller #0 [ 452.517637][ T1150] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.526369][ T1150] task:syz-executor341 state:D stack:23584 pid: 6864 ppid: 6863 flags:0x00000000 [ 452.536653][ T1150] Call Trace: [ 452.540055][ T1150] __schedule+0x8e5/0x21e0 [ 452.545404][ T1150] ? io_schedule_timeout+0x140/0x140 [ 452.550694][ T1150] schedule+0xd0/0x2a0 [ 452.555790][ T1150] schedule_timeout+0x1d8/0x250 [ 452.560728][ T1150] ? usleep_range+0x170/0x170 [ 452.566257][ T1150] ? mark_held_locks+0x9f/0xe0 [ 452.571019][ T1150] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.576884][ T1150] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.583425][ T1150] ? trace_hardirqs_on+0x5f/0x220 [ 452.588446][ T1150] wait_for_completion+0x163/0x260 [ 452.594221][ T1150] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 452.600738][ T1150] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.606647][ T1150] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.613194][ T1150] __flush_work+0x51f/0xab0 [ 452.617690][ T1150] ? queue_work_node+0x370/0x370 [ 452.624021][ T1150] ? debug_object_init_on_stack+0x20/0x20 [ 452.629738][ T1150] ? flush_workqueue_prep_pwqs+0x4f0/0x4f0 [ 452.636212][ T1150] ? mark_held_locks+0x9f/0xe0 [ 452.640973][ T1150] ? __cancel_work_timer+0x516/0x700 [ 452.647008][ T1150] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.653474][ T1150] __cancel_work_timer+0x5de/0x700 [ 452.658910][ T1150] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 452.665535][ T1150] ? lock_acquire+0x1f1/0xad0 [ 452.670283][ T1150] ? __sock_release+0x86/0x280 [ 452.676265][ T1150] ? lock_release+0x8e0/0x8e0 [ 452.681024][ T1150] tls_sk_proto_close+0x4a7/0xaf0 [ 452.686681][ T1150] ? wait_on_pending_writer+0x3f0/0x3f0 [ 452.692791][ T1150] ? ip_mc_drop_socket+0x16/0x260 [ 452.697818][ T1150] inet_release+0x12e/0x280 [ 452.703060][ T1150] inet6_release+0x4c/0x70 [ 452.707466][ T1150] __sock_release+0xcd/0x280 [ 452.712895][ T1150] sock_close+0x18/0x20 [ 452.717105][ T1150] __fput+0x285/0x920 [ 452.721084][ T1150] ? __sock_release+0x280/0x280 [ 452.726809][ T1150] task_work_run+0xdd/0x190 [ 452.731377][ T1150] exit_to_user_mode_prepare+0x195/0x1c0 [ 452.737706][ T1150] syscall_exit_to_user_mode+0x59/0x2b0 [ 452.743678][ T1150] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 452.749576][ T1150] RIP: 0033:0x403950 [ 452.754094][ T1150] Code: Bad RIP value. [ 452.758683][ T1150] RSP: 002b:00007ffd11a244d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 452.767929][ T1150] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403950 [ 452.775977][ T1150] RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 [ 452.784017][ T1150] RBP: 00007ffd11a244e0 R08: 0000000000000000 R09: 00000000000000d8 [ 452.792055][ T1150] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd11a244f0 [ 452.800022][ T1150] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 452.808076][ T1150] [ 452.808076][ T1150] Showing all locks held in the system: [ 452.815881][ T1150] 3 locks held by kworker/0:0/5: [ 452.820796][ T1150] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 452.831205][ T1150] #1: ffffc90000cbfda8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 452.844314][ T1150] #2: ffff8880918fc4d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 452.853917][ T1150] 1 lock held by khungtaskd/1150: [ 452.858926][ T1150] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 452.868854][ T1150] 1 lock held by syz-executor341/6864: [ 452.874383][ T1150] #0: ffff8880850f7210 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 452.884960][ T1150] [ 452.887277][ T1150] ============================================= [ 452.887277][ T1150] [ 452.895725][ T1150] NMI backtrace for cpu 1 [ 452.900050][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 452.908259][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 452.918311][ T1150] Call Trace: [ 452.921652][ T1150] dump_stack+0x18f/0x20d [ 452.926007][ T1150] nmi_cpu_backtrace.cold+0x70/0xb1 [ 452.931222][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 452.936837][ T1150] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 452.942837][ T1150] watchdog+0xd7d/0x1000 [ 452.947083][ T1150] ? reset_hung_task_detector+0x30/0x30 [ 452.952608][ T1150] kthread+0x3b5/0x4a0 [ 452.956653][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 452.961741][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 452.966884][ T1150] ret_from_fork+0x1f/0x30 [ 452.971392][ T1150] Sending NMI from CPU 1 to CPUs 0: [ 452.977056][ C0] NMI backtrace for cpu 0 [ 452.977061][ C0] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.9.0-rc2-syzkaller #0 [ 452.977067][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 452.977070][ C0] Workqueue: bat_events batadv_nc_worker [ 452.977076][ C0] RIP: 0010:check_memory_region+0x17/0x180 [ 452.977086][ C0] Code: 0f 1f 00 48 89 f2 be f8 00 00 00 e9 b3 7a 02 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 <0f> 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 [ 452.977090][ C0] RSP: 0018:ffffc90000cdfb98 EFLAGS: 00000096 [ 452.977096][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815a635e [ 452.977101][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ab23488 [ 452.977106][ C0] RBP: 1ffff9200019bf79 R08: 0000000000000000 R09: ffffffff8ab23490 [ 452.977110][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bd6900 [ 452.977115][ C0] R13: ffffffff87d7d261 R14: dffffc0000000000 R15: 00000000000001ce [ 452.977120][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 452.977124][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 452.977129][ C0] CR2: 00007f3f27af8000 CR3: 00000000a6cac000 CR4: 00000000001506f0 [ 452.977133][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 452.977138][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 452.977140][ C0] Call Trace: [ 452.977143][ C0] lock_release+0x18e/0x8e0 [ 452.977146][ C0] ? lock_downgrade+0x830/0x830 [ 452.977149][ C0] ? lock_acquire+0x1f1/0xad0 [ 452.977153][ C0] batadv_nc_worker+0x7a3/0xe50 [ 452.977156][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.977159][ C0] process_one_work+0x94c/0x1670 [ 452.977162][ C0] ? lock_release+0x8e0/0x8e0 [ 452.977165][ C0] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 452.977169][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 452.977172][ C0] worker_thread+0x64c/0x1120 [ 452.977175][ C0] ? process_one_work+0x1670/0x1670 [ 452.977178][ C0] kthread+0x3b5/0x4a0 [ 452.977181][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 452.977184][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 452.977187][ C0] ret_from_fork+0x1f/0x30 [ 452.977700][ T1150] Kernel panic - not syncing: hung_task: blocked tasks [ 453.199459][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 453.207722][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.217777][ T1150] Call Trace: [ 453.221066][ T1150] dump_stack+0x18f/0x20d [ 453.225453][ T1150] panic+0x2e3/0x75c [ 453.229330][ T1150] ? __warn_printk+0xf3/0xf3 [ 453.233910][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 453.239539][ T1150] ? preempt_schedule_thunk+0x16/0x18 [ 453.244915][ T1150] ? watchdog.cold+0x5/0x16b [ 453.249495][ T1150] ? watchdog+0xa82/0x1000 [ 453.253893][ T1150] watchdog.cold+0x16/0x16b [ 453.258384][ T1150] ? reset_hung_task_detector+0x30/0x30 [ 453.263905][ T1150] kthread+0x3b5/0x4a0 [ 453.267949][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 453.273150][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 453.278240][ T1150] ret_from_fork+0x1f/0x30 [ 453.283499][ T1150] Kernel Offset: disabled [ 453.287824][ T1150] Rebooting in 86400 seconds..