[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. syzkaller login: [ 295.425405][ T6815] IPVS: ftp: loaded support on port[0] = 21 [ 295.518223][ T6815] chnl_net:caif_netlink_parms(): no params data found [ 295.574086][ T6815] bridge0: port 1(bridge_slave_0) entered blocking state [ 295.582567][ T6815] bridge0: port 1(bridge_slave_0) entered disabled state [ 295.590557][ T6815] device bridge_slave_0 entered promiscuous mode [ 295.601161][ T6815] bridge0: port 2(bridge_slave_1) entered blocking state [ 295.608365][ T6815] bridge0: port 2(bridge_slave_1) entered disabled state [ 295.617029][ T6815] device bridge_slave_1 entered promiscuous mode [ 295.637868][ T6815] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 295.648916][ T6815] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 295.673470][ T6815] team0: Port device team_slave_0 added [ 295.681795][ T6815] team0: Port device team_slave_1 added [ 295.699181][ T6815] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 295.706261][ T6815] 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. [ 295.733058][ T6815] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 295.746013][ T6815] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 295.753572][ T6815] 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. [ 295.780223][ T6815] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 295.808186][ T6815] device hsr_slave_0 entered promiscuous mode [ 295.814992][ T6815] device hsr_slave_1 entered promiscuous mode [ 295.917511][ T6815] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 295.928097][ T6815] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 295.944672][ T6815] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 295.955813][ T6815] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 295.982378][ T6815] bridge0: port 2(bridge_slave_1) entered blocking state [ 295.989568][ T6815] bridge0: port 2(bridge_slave_1) entered forwarding state [ 295.997673][ T6815] bridge0: port 1(bridge_slave_0) entered blocking state [ 296.004870][ T6815] bridge0: port 1(bridge_slave_0) entered forwarding state [ 296.054584][ T6815] 8021q: adding VLAN 0 to HW filter on device bond0 [ 296.068523][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 296.079939][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 296.089888][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 296.099238][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 296.113583][ T6815] 8021q: adding VLAN 0 to HW filter on device team0 [ 296.126257][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 296.135735][ T3559] bridge0: port 1(bridge_slave_0) entered blocking state [ 296.142978][ T3559] bridge0: port 1(bridge_slave_0) entered forwarding state [ 296.161743][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 296.170174][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 296.177328][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 296.199830][ T6815] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 296.210821][ T6815] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 296.224484][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 296.234762][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 296.244061][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 296.254997][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 296.263608][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 296.271573][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 296.290589][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 296.298264][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 296.313160][ T6815] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 296.333886][ T3622] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 296.354953][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 296.364392][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 296.372741][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 296.383096][ T6815] device veth0_vlan entered promiscuous mode [ 296.395663][ T6815] device veth1_vlan entered promiscuous mode [ 296.419093][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 296.428266][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 296.437289][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 296.448888][ T6815] device veth0_macvtap entered promiscuous mode [ 296.459926][ T6815] device veth1_macvtap entered promiscuous mode [ 296.479524][ T6815] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 296.487143][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 296.497322][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 296.509408][ T6815] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 296.516850][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready executing program [ 296.525754][ T3559] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 296.538297][ T6815] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 296.547256][ T6815] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 296.557660][ T6815] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 296.566459][ T6815] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 296.669841][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 452.491205][ T1167] INFO: task syz-executor014:6815 blocked for more than 143 seconds. [ 452.499440][ T1167] Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 [ 452.508324][ T1167] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.517300][ T1167] task:syz-executor014 state:D stack:23536 pid: 6815 ppid: 6814 flags:0x00004000 [ 452.527060][ T1167] Call Trace: [ 452.530939][ T1167] __schedule+0x8e5/0x21e0 [ 452.536152][ T1167] ? io_schedule_timeout+0x140/0x140 [ 452.542104][ T1167] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 452.548085][ T1167] ? mark_held_locks+0x9f/0xe0 [ 452.553614][ T1167] schedule+0xd0/0x2a0 [ 452.557710][ T1167] schedule_timeout+0x1d8/0x250 [ 452.563255][ T1167] ? usleep_range+0x170/0x170 [ 452.567926][ T1167] ? mark_held_locks+0x9f/0xe0 [ 452.575036][ T1167] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.580249][ T1167] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.586966][ T1167] ? trace_hardirqs_on+0x5f/0x220 [ 452.592429][ T1167] wait_for_completion+0x163/0x260 [ 452.597547][ T1167] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 452.604882][ T1167] ? lockdep_hardirqs_off+0x89/0xc0 [ 452.610147][ T1167] __flush_work+0x51f/0xab0 [ 452.615340][ T1167] ? queue_work_node+0x370/0x370 [ 452.620324][ T1167] ? debug_object_init_on_stack+0x20/0x20 [ 452.627206][ T1167] ? flush_workqueue_prep_pwqs+0x4f0/0x4f0 [ 452.633493][ T1167] ? mark_held_locks+0x9f/0xe0 [ 452.638253][ T1167] ? __cancel_work_timer+0x516/0x700 [ 452.644318][ T1167] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.650292][ T1167] __cancel_work_timer+0x5de/0x700 [ 452.656266][ T1167] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 452.663194][ T1167] ? lock_acquire+0x1f1/0xad0 [ 452.668072][ T1167] ? __sock_release+0x86/0x280 [ 452.673528][ T1167] ? lock_release+0x8e0/0x8e0 [ 452.678274][ T1167] tls_sk_proto_close+0x4a7/0xaf0 [ 452.684585][ T1167] ? wait_on_pending_writer+0x3f0/0x3f0 [ 452.690151][ T1167] ? ip_mc_drop_socket+0x16/0x260 [ 452.695952][ T1167] inet_release+0x12e/0x280 [ 452.700498][ T1167] inet6_release+0x4c/0x70 [ 452.705596][ T1167] __sock_release+0xcd/0x280 [ 452.710180][ T1167] sock_close+0x18/0x20 [ 452.715214][ T1167] __fput+0x285/0x920 [ 452.719189][ T1167] ? __sock_release+0x280/0x280 [ 452.724937][ T1167] task_work_run+0xdd/0x190 [ 452.729476][ T1167] exit_to_user_mode_prepare+0x195/0x1c0 [ 452.735801][ T1167] syscall_exit_to_user_mode+0x59/0x2b0 [ 452.741982][ T1167] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 452.747882][ T1167] RIP: 0033:0x403950 [ 452.752984][ T1167] Code: Bad RIP value. [ 452.757036][ T1167] RSP: 002b:00007fff6bd1cf98 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 452.766274][ T1167] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403950 [ 452.774737][ T1167] RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 [ 452.783214][ T1167] RBP: 00007fff6bd1cfa0 R08: 0000000000000000 R09: 00000000000000d8 [ 452.791742][ T1167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6bd1cfb0 [ 452.799716][ T1167] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 452.808409][ T1167] [ 452.808409][ T1167] Showing all locks held in the system: [ 452.816737][ T1167] 4 locks held by kworker/u4:0/7: [ 452.822416][ T1167] 1 lock held by khungtaskd/1167: [ 452.827443][ T1167] #0: ffffffff89c67640 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 452.838066][ T1167] 1 lock held by in:imklog/6517: [ 452.843454][ T1167] #0: ffff8880a8b1c930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 452.853108][ T1167] 1 lock held by syz-executor014/6815: [ 452.858563][ T1167] #0: ffff888085128750 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 452.869873][ T1167] 3 locks held by kworker/0:3/7021: [ 452.875528][ T1167] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 452.886817][ T1167] #1: ffffc90006137da8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 452.900318][ T1167] #2: ffff88809dc300d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 452.910321][ T1167] [ 452.913652][ T1167] ============================================= [ 452.913652][ T1167] [ 452.922723][ T1167] NMI backtrace for cpu 0 [ 452.927042][ T1167] CPU: 0 PID: 1167 Comm: khungtaskd Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 [ 452.936470][ T1167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 452.946515][ T1167] Call Trace: [ 452.949831][ T1167] dump_stack+0x18f/0x20d [ 452.954150][ T1167] nmi_cpu_backtrace.cold+0x44/0xd7 [ 452.959380][ T1167] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 452.965017][ T1167] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 452.971045][ T1167] watchdog+0xd89/0xf30 [ 452.975187][ T1167] ? trace_sched_process_hang+0x2e0/0x2e0 [ 452.980899][ T1167] kthread+0x3b5/0x4a0 [ 452.984976][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 452.990907][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 452.996066][ T1167] ret_from_fork+0x1f/0x30 [ 453.000620][ T1167] Sending NMI from CPU 0 to CPUs 1: [ 453.006422][ C1] NMI backtrace for cpu 1 [ 453.006430][ C1] CPU: 1 PID: 3893 Comm: systemd-journal Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 [ 453.006438][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.006442][ C1] RIP: 0010:path_init+0x1d1/0x13c0 [ 453.006454][ C1] Code: 24 40 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 73 0e 00 00 44 8b 2d cf 44 de 07 <31> ff 45 89 ef 41 83 e7 01 44 89 fe e8 4e 87 b1 ff 45 84 ff 0f 85 [ 453.006459][ C1] RSP: 0018:ffffc900052f7a48 EFLAGS: 00000246 [ 453.006468][ C1] RAX: 0000000000000000 RBX: 0000000000000040 RCX: ffffffff81c2f109 [ 453.006474][ C1] RDX: 1ffffffff13426c8 RSI: ffffffff81c2f117 RDI: ffffc900052f7c98 [ 453.006480][ C1] RBP: ffffc900052f7ae8 R08: 0000000000000000 R09: ffffffff8c6a59e7 [ 453.006486][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900052f7c58 [ 453.006492][ C1] R13: 0000000000001444 R14: ffffffff89a13640 R15: 0000000000000000 [ 453.006498][ C1] FS: 00007fcc879848c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 453.006503][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 453.006509][ C1] CR2: 00007fcc84d25000 CR3: 0000000094282000 CR4: 00000000001506e0 [ 453.006515][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 453.006521][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 453.006524][ C1] Call Trace: [ 453.006529][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 453.006533][ C1] path_openat+0x185/0x2730 [ 453.006537][ C1] ? __lock_acquire+0x16cb/0x5640 [ 453.006541][ C1] ? path_lookupat+0x830/0x830 [ 453.006546][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 453.006551][ C1] ? lock_is_held_type+0xbb/0xf0 [ 453.006555][ C1] do_filp_open+0x17e/0x3c0 [ 453.006559][ C1] ? may_open_dev+0xf0/0xf0 [ 453.006563][ C1] ? __alloc_fd+0x28d/0x600 [ 453.006567][ C1] ? do_raw_spin_lock+0x120/0x2b0 [ 453.006571][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 453.006576][ C1] ? _raw_spin_unlock+0x24/0x40 [ 453.006580][ C1] ? __alloc_fd+0x28d/0x600 [ 453.006584][ C1] do_sys_openat2+0x16d/0x420 [ 453.006589][ C1] ? seccomp_notify_ioctl+0xd90/0xd90 [ 453.006593][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 453.006597][ C1] ? build_open_flags+0x650/0x650 [ 453.006602][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 453.006606][ C1] __x64_sys_open+0x119/0x1c0 [ 453.006611][ C1] ? do_sys_open+0x140/0x140 [ 453.006615][ C1] ? __secure_computing+0x104/0x360 [ 453.006619][ C1] do_syscall_64+0x2d/0x70 [ 453.006624][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 453.006628][ C1] RIP: 0033:0x7fcc86f14840 [ 453.006640][ C1] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 453.006644][ C1] RSP: 002b:00007ffe226b7b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 453.006654][ C1] RAX: ffffffffffffffda RBX: 00007ffe226b7e60 RCX: 00007fcc86f14840 [ 453.006660][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000563cfc995a50 [ 453.006666][ C1] RBP: 000000000000000d R08: 000000000000c0ff R09: 00000000ffffffff [ 453.006679][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 453.006685][ C1] R13: 0000563cfc989040 R14: 00007ffe226b7e20 R15: 0000563cfc995820 [ 453.006929][ T1167] Kernel panic - not syncing: hung_task: blocked tasks [ 453.336309][ T1167] CPU: 0 PID: 1167 Comm: khungtaskd Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 [ 453.345734][ T1167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.355766][ T1167] Call Trace: [ 453.359039][ T1167] dump_stack+0x18f/0x20d [ 453.363417][ T1167] panic+0x2e3/0x75c [ 453.367294][ T1167] ? __warn_printk+0xf3/0xf3 [ 453.371904][ T1167] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 453.377528][ T1167] ? preempt_schedule_thunk+0x16/0x18 [ 453.382904][ T1167] ? watchdog.cold+0x22d/0x24b [ 453.387647][ T1167] ? watchdog+0xc59/0xf30 [ 453.391957][ T1167] watchdog.cold+0x23e/0x24b [ 453.396529][ T1167] ? trace_sched_process_hang+0x2e0/0x2e0 [ 453.402228][ T1167] kthread+0x3b5/0x4a0 [ 453.406290][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 453.411379][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 453.416468][ T1167] ret_from_fork+0x1f/0x30 [ 453.422115][ T1167] Kernel Offset: disabled [ 453.426439][ T1167] Rebooting in 86400 seconds..