[ 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 '10.128.0.61' (ECDSA) to the list of known hosts. syzkaller login: [ 300.446946][ T6891] IPVS: ftp: loaded support on port[0] = 21 [ 300.536166][ T6891] chnl_net:caif_netlink_parms(): no params data found [ 300.587892][ T6891] bridge0: port 1(bridge_slave_0) entered blocking state [ 300.596045][ T6891] bridge0: port 1(bridge_slave_0) entered disabled state [ 300.605988][ T6891] device bridge_slave_0 entered promiscuous mode [ 300.614939][ T6891] bridge0: port 2(bridge_slave_1) entered blocking state [ 300.622210][ T6891] bridge0: port 2(bridge_slave_1) entered disabled state [ 300.630011][ T6891] device bridge_slave_1 entered promiscuous mode [ 300.650235][ T6891] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 300.661144][ T6891] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 300.684126][ T6891] team0: Port device team_slave_0 added [ 300.691317][ T6891] team0: Port device team_slave_1 added [ 300.708139][ T6891] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 300.715111][ T6891] 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. [ 300.741835][ T6891] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 300.754165][ T6891] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 300.761265][ T6891] 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. [ 300.787201][ T6891] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 300.813268][ T6891] device hsr_slave_0 entered promiscuous mode [ 300.819952][ T6891] device hsr_slave_1 entered promiscuous mode [ 300.914714][ T6891] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 300.924319][ T6891] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 300.934312][ T6891] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 300.944413][ T6891] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 300.969293][ T6891] bridge0: port 2(bridge_slave_1) entered blocking state [ 300.976458][ T6891] bridge0: port 2(bridge_slave_1) entered forwarding state [ 300.984016][ T6891] bridge0: port 1(bridge_slave_0) entered blocking state [ 300.991124][ T6891] bridge0: port 1(bridge_slave_0) entered forwarding state [ 301.034496][ T6891] 8021q: adding VLAN 0 to HW filter on device bond0 [ 301.048068][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 301.060035][ T2582] bridge0: port 1(bridge_slave_0) entered disabled state [ 301.068105][ T2582] bridge0: port 2(bridge_slave_1) entered disabled state [ 301.075834][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 301.089769][ T6891] 8021q: adding VLAN 0 to HW filter on device team0 [ 301.100515][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 301.110301][ T2582] bridge0: port 1(bridge_slave_0) entered blocking state [ 301.117433][ T2582] bridge0: port 1(bridge_slave_0) entered forwarding state [ 301.129901][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 301.138318][ T23] bridge0: port 2(bridge_slave_1) entered blocking state [ 301.145359][ T23] bridge0: port 2(bridge_slave_1) entered forwarding state [ 301.164575][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 301.173948][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 301.186159][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 301.199438][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 301.212862][ T6891] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 301.224726][ T6891] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 301.233991][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 301.253537][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 301.261487][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 301.274040][ T6891] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 301.293118][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 301.312548][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 301.320834][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 301.329147][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 301.340976][ T6891] device veth0_vlan entered promiscuous mode [ 301.352836][ T6891] device veth1_vlan entered promiscuous mode [ 301.373919][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 301.382955][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 301.392304][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 301.403467][ T6891] device veth0_macvtap entered promiscuous mode [ 301.414298][ T6891] device veth1_macvtap entered promiscuous mode [ 301.432083][ T6891] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 301.441354][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 301.452426][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 301.464498][ T6891] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 301.472440][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 301.484022][ T6891] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 301.494088][ T6891] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 301.502888][ T6891] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 301.512009][ T6891] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 301.631985][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 311.028628][ T0] NOHZ: local_softirq_pending 08 [ 351.984313][ T0] NOHZ: local_softirq_pending 08 [ 433.901360][ T0] NOHZ: local_softirq_pending 08 [ 452.458915][ T1141] INFO: task syz-executor125:6891 blocked for more than 143 seconds. [ 452.467121][ T1141] Not tainted 5.9.0-rc1-syzkaller #0 [ 452.475576][ T1141] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.486177][ T1141] task:syz-executor125 state:D stack:23888 pid: 6891 ppid: 6890 flags:0x00004000 [ 452.496178][ T1141] Call Trace: [ 452.499632][ T1141] __schedule+0x8e5/0x21e0 [ 452.504112][ T1141] ? io_schedule_timeout+0x140/0x140 [ 452.510312][ T1141] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 452.516356][ T1141] ? mark_held_locks+0x9f/0xe0 [ 452.521796][ T1141] schedule+0xd0/0x2a0 [ 452.525896][ T1141] schedule_timeout+0x1d8/0x250 [ 452.531420][ T1141] ? usleep_range+0x170/0x170 [ 452.536088][ T1141] ? mark_held_locks+0x9f/0xe0 [ 452.541859][ T1141] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.547047][ T1141] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.553715][ T1141] ? trace_hardirqs_on+0x5f/0x220 [ 452.559228][ T1141] wait_for_completion+0x163/0x260 [ 452.564339][ T1141] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 452.571628][ T1141] ? lockdep_hardirqs_off+0x89/0xc0 [ 452.576905][ T1141] __flush_work+0x51f/0xab0 [ 452.582084][ T1141] ? queue_work_node+0x370/0x370 [ 452.587106][ T1141] ? debug_object_init_on_stack+0x20/0x20 [ 452.593470][ T1141] ? flush_workqueue_prep_pwqs+0x4f0/0x4f0 [ 452.599674][ T1141] ? mark_held_locks+0x9f/0xe0 [ 452.604424][ T1141] ? __cancel_work_timer+0x516/0x700 [ 452.610337][ T1141] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.616392][ T1141] __cancel_work_timer+0x5de/0x700 [ 452.622160][ T1141] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 452.628040][ T1141] ? lock_acquire+0x1f1/0xad0 [ 452.633471][ T1141] ? __sock_release+0x86/0x280 [ 452.638223][ T1141] ? lock_release+0x8e0/0x8e0 [ 452.643568][ T1141] tls_sk_proto_close+0x4a7/0xaf0 [ 452.648579][ T1141] ? wait_on_pending_writer+0x3f0/0x3f0 [ 452.654861][ T1141] ? ip_mc_drop_socket+0x16/0x260 [ 452.660400][ T1141] inet_release+0x12e/0x280 [ 452.664925][ T1141] inet6_release+0x4c/0x70 [ 452.669978][ T1141] __sock_release+0xcd/0x280 [ 452.674555][ T1141] sock_close+0x18/0x20 [ 452.679629][ T1141] __fput+0x285/0x920 [ 452.683616][ T1141] ? __sock_release+0x280/0x280 [ 452.688446][ T1141] task_work_run+0xdd/0x190 [ 452.694456][ T1141] exit_to_user_mode_prepare+0x195/0x1c0 [ 452.700501][ T1141] syscall_exit_to_user_mode+0x59/0x2b0 [ 452.706036][ T1141] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 452.712558][ T1141] RIP: 0033:0x403950 [ 452.716434][ T1141] Code: Bad RIP value. [ 452.721178][ T1141] RSP: 002b:00007ffc63265218 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 452.730162][ T1141] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403950 [ 452.738122][ T1141] RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 [ 452.746887][ T1141] RBP: 00007ffc63265220 R08: 0000000000000000 R09: 00000000000000d8 [ 452.755288][ T1141] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc63265230 [ 452.763690][ T1141] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 452.772148][ T1141] [ 452.772148][ T1141] Showing all locks held in the system: [ 452.780327][ T1141] 1 lock held by khungtaskd/1141: [ 452.785330][ T1141] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 452.795909][ T1141] 1 lock held by in:imklog/6583: [ 452.801296][ T1141] #0: ffff88809f254930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 452.810995][ T1141] 1 lock held by syz-executor125/6891: [ 452.816433][ T1141] #0: ffff888089e1d210 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 452.827636][ T1141] 3 locks held by kworker/0:3/7097: [ 452.833258][ T1141] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 452.844055][ T1141] #1: ffffc90006297da8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 452.857532][ T1141] #2: ffff888092a284d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 452.867457][ T1141] [ 452.870676][ T1141] ============================================= [ 452.870676][ T1141] [ 452.879632][ T1141] NMI backtrace for cpu 0 [ 452.883959][ T1141] CPU: 0 PID: 1141 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 452.892167][ T1141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 452.902194][ T1141] Call Trace: [ 452.905517][ T1141] dump_stack+0x18f/0x20d [ 452.909842][ T1141] nmi_cpu_backtrace.cold+0x70/0xb1 [ 452.915057][ T1141] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 452.920662][ T1141] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 452.926658][ T1141] watchdog+0xd7d/0x1000 [ 452.930898][ T1141] ? reset_hung_task_detector+0x30/0x30 [ 452.936437][ T1141] kthread+0x3b5/0x4a0 [ 452.940489][ T1141] ? __kthread_bind_mask+0xc0/0xc0 [ 452.945580][ T1141] ? __kthread_bind_mask+0xc0/0xc0 [ 452.950751][ T1141] ret_from_fork+0x1f/0x30 [ 452.955386][ T1141] Sending NMI from CPU 0 to CPUs 1: [ 452.961195][ C1] NMI backtrace for cpu 1 [ 452.961200][ C1] CPU: 1 PID: 3910 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 [ 452.961206][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 452.961209][ C1] RIP: 0010:__lock_acquire+0x170f/0x5640 [ 452.961219][ C1] Code: af 5c 24 08 48 c1 eb 31 48 8d 04 dd 40 c9 5a 8c 48 89 c2 48 89 44 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 b0 35 00 00 4c 8b 24 dd 40 c9 5a 8c 4d 85 e4 74 63 49 83 ec [ 452.961222][ C1] RSP: 0018:ffffc90000eb7990 EFLAGS: 00000046 [ 452.961229][ C1] RAX: dffffc0000000000 RBX: 00000000000065de RCX: ffffffff815a14fb [ 452.961233][ C1] RDX: 1ffffffff18bbf06 RSI: 0000000000000008 RDI: ffffffff8c5f89e8 [ 452.961238][ C1] RBP: ffff8880a925cb10 R08: 0000000000000000 R09: ffffffff8c5f89ef [ 452.961242][ C1] R10: fffffbfff18bf13d R11: 0000000000000000 R12: 0000000000000000 [ 452.961247][ C1] R13: 0000000000000000 R14: ffff8880a925c200 R15: 0000000000000000 [ 452.961251][ C1] FS: 00007fd8eac2b8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 452.961255][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 452.961260][ C1] CR2: 00007fd8e7fd3008 CR3: 0000000092ea8000 CR4: 00000000001506e0 [ 452.961264][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 452.961274][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 452.961277][ C1] Call Trace: [ 452.961279][ C1] ? step_into+0x252/0x1990 [ 452.961283][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 452.961286][ C1] ? lock_is_held_type+0xbb/0xf0 [ 452.961289][ C1] lock_acquire+0x1f1/0xad0 [ 452.961292][ C1] ? lockref_get_not_dead+0x14/0x80 [ 452.961295][ C1] ? lock_release+0x8e0/0x8e0 [ 452.961298][ C1] ? lookup_fast+0x6c0/0x6c0 [ 452.961301][ C1] ? unlazy_child+0x470/0x470 [ 452.961304][ C1] ? inode_permission.part.0+0xab/0x410 [ 452.961307][ C1] _raw_spin_lock+0x2a/0x40 [ 452.961310][ C1] ? lockref_get_not_dead+0x14/0x80 [ 452.961313][ C1] lockref_get_not_dead+0x14/0x80 [ 452.961316][ C1] __legitimize_path+0x7f/0x1c0 [ 452.961319][ C1] unlazy_walk+0x106/0x3a0 [ 452.961322][ C1] complete_walk+0xc6/0x2d0 [ 452.961325][ C1] path_lookupat+0x278/0x830 [ 452.961328][ C1] filename_lookup+0x19f/0x560 [ 452.961330][ C1] ? may_linkat+0x2b0/0x2b0 [ 452.961334][ C1] ? __check_object_size+0x171/0x3e4 [ 452.961337][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 452.961340][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 452.961343][ C1] ? bpf_lsm_cred_prepare+0x5/0x10 [ 452.961346][ C1] do_faccessat+0x129/0x820 [ 452.961349][ C1] ? stream_open+0x60/0x60 [ 452.961352][ C1] ? __secure_computing+0x104/0x360 [ 452.961355][ C1] do_syscall_64+0x2d/0x70 [ 452.961358][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 452.961361][ C1] RIP: 0033:0x7fd8e9ee79c7 [ 452.961371][ C1] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 452.961374][ C1] RSP: 002b:00007ffc031fe938 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 452.961382][ C1] RAX: ffffffffffffffda RBX: 00007ffc03201850 RCX: 00007fd8e9ee79c7 [ 452.961386][ C1] RDX: 00007fd8ea958a00 RSI: 0000000000000000 RDI: 00005640c0dfd9a3 [ 452.961390][ C1] RBP: 00007ffc031fe970 R08: 0000000000000000 R09: 0000000000000000 [ 452.961395][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 452.961399][ C1] R13: 0000000000000000 R14: 00007ffc03201850 R15: 00007ffc031fee60 [ 452.961733][ T1141] Kernel panic - not syncing: hung_task: blocked tasks [ 453.308390][ T1141] CPU: 0 PID: 1141 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 453.316597][ T1141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.326673][ T1141] Call Trace: [ 453.329952][ T1141] dump_stack+0x18f/0x20d [ 453.335271][ T1141] panic+0x2e3/0x75c [ 453.339165][ T1141] ? __warn_printk+0xf3/0xf3 [ 453.343780][ T1141] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 453.349387][ T1141] ? preempt_schedule_thunk+0x16/0x18 [ 453.354733][ T1141] ? watchdog.cold+0x5/0x16b [ 453.359296][ T1141] ? watchdog+0xa82/0x1000 [ 453.363686][ T1141] watchdog.cold+0x16/0x16b [ 453.368181][ T1141] ? reset_hung_task_detector+0x30/0x30 [ 453.373717][ T1141] kthread+0x3b5/0x4a0 [ 453.377765][ T1141] ? __kthread_bind_mask+0xc0/0xc0 [ 453.382894][ T1141] ? __kthread_bind_mask+0xc0/0xc0 [ 453.388022][ T1141] ret_from_fork+0x1f/0x30 [ 453.393789][ T1141] Kernel Offset: disabled [ 453.398131][ T1141] Rebooting in 86400 seconds..