[ 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 '10.128.0.44' (ECDSA) to the list of known hosts. syzkaller login: [ 470.008083][ T6890] IPVS: ftp: loaded support on port[0] = 21 [ 470.107744][ T6890] chnl_net:caif_netlink_parms(): no params data found [ 470.163059][ T6890] bridge0: port 1(bridge_slave_0) entered blocking state [ 470.171607][ T6890] bridge0: port 1(bridge_slave_0) entered disabled state [ 470.180792][ T6890] device bridge_slave_0 entered promiscuous mode [ 470.190747][ T6890] bridge0: port 2(bridge_slave_1) entered blocking state [ 470.198415][ T6890] bridge0: port 2(bridge_slave_1) entered disabled state [ 470.206101][ T6890] device bridge_slave_1 entered promiscuous mode [ 470.228285][ T6890] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 470.239293][ T6890] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 470.263073][ T6890] team0: Port device team_slave_0 added [ 470.270551][ T6890] team0: Port device team_slave_1 added [ 470.289393][ T6890] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 470.296326][ T6890] 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. [ 470.323596][ T6890] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 470.336410][ T6890] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 470.343498][ T6890] 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. [ 470.369556][ T6890] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 470.397604][ T6890] device hsr_slave_0 entered promiscuous mode [ 470.404253][ T6890] device hsr_slave_1 entered promiscuous mode [ 470.488773][ T6890] debugfs: Directory 'ethtool' with parent 'netdevsim0' already present! [ 470.501832][ T6890] debugfs: Directory 'ethtool' with parent 'netdevsim0' already present! [ 470.514601][ T6890] debugfs: Directory 'ethtool' with parent 'netdevsim0' already present! [ 470.531391][ T6890] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 470.541513][ T6890] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 470.552034][ T6890] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 470.563291][ T6890] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 470.589905][ T6890] bridge0: port 2(bridge_slave_1) entered blocking state [ 470.597068][ T6890] bridge0: port 2(bridge_slave_1) entered forwarding state [ 470.604641][ T6890] bridge0: port 1(bridge_slave_0) entered blocking state [ 470.611796][ T6890] bridge0: port 1(bridge_slave_0) entered forwarding state [ 470.660546][ T6890] 8021q: adding VLAN 0 to HW filter on device bond0 [ 470.673564][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 470.685076][ T7018] bridge0: port 1(bridge_slave_0) entered disabled state [ 470.693648][ T7018] bridge0: port 2(bridge_slave_1) entered disabled state [ 470.703252][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 470.718239][ T6890] 8021q: adding VLAN 0 to HW filter on device team0 [ 470.730458][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 470.738885][ T6882] bridge0: port 1(bridge_slave_0) entered blocking state [ 470.745929][ T6882] bridge0: port 1(bridge_slave_0) entered forwarding state [ 470.758845][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 470.767718][ T7018] bridge0: port 2(bridge_slave_1) entered blocking state [ 470.774758][ T7018] bridge0: port 2(bridge_slave_1) entered forwarding state [ 470.798716][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 470.819000][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 470.828004][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 470.836425][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 470.845678][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 470.858102][ T6890] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 470.878093][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 470.885463][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 470.900527][ T6890] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 470.921527][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 470.941389][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 470.950641][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 470.958552][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 470.969919][ T6890] device veth0_vlan entered promiscuous mode [ 470.981796][ T6890] device veth1_vlan entered promiscuous mode [ 471.003931][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 471.012724][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 471.021608][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 471.033054][ T6890] device veth0_macvtap entered promiscuous mode [ 471.044045][ T6890] device veth1_macvtap entered promiscuous mode [ 471.063494][ T6890] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 471.072359][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 471.082368][ T6882] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 471.094489][ T6890] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 471.102396][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 471.112100][ T7018] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 471.123105][ T6890] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 471.132278][ T6890] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 471.142020][ T6890] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 471.151155][ T6890] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 471.318720][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 616.266362][ T1179] INFO: task syz-executor129:7102 blocked for more than 143 seconds. [ 616.275281][ T1179] Not tainted 5.9.0-rc6-next-20200922-syzkaller #0 [ 616.282415][ T1179] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.291172][ T1179] task:syz-executor129 state:D stack:26128 pid: 7102 ppid: 6890 flags:0x00000004 [ 616.300505][ T1179] Call Trace: [ 616.303858][ T1179] __schedule+0xec5/0x2200 [ 616.308375][ T1179] ? io_schedule_timeout+0x140/0x140 [ 616.313680][ T1179] ? lock_chain_count+0x20/0x20 [ 616.318656][ T1179] schedule+0xcf/0x270 [ 616.322731][ T1179] schedule_timeout+0x1d8/0x250 [ 616.327664][ T1179] ? usleep_range+0x170/0x170 [ 616.332355][ T1179] ? mark_held_locks+0x9f/0xe0 [ 616.337277][ T1179] ? rwlock_bug.part.0+0x90/0x90 [ 616.342232][ T1179] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.347539][ T1179] wait_for_completion+0x163/0x260 [ 616.352664][ T1179] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.359281][ T1179] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.365097][ T1179] __flush_work+0x51f/0xac0 [ 616.369688][ T1179] ? queue_delayed_work_on+0x1d0/0x1d0 [ 616.375220][ T1179] ? debug_object_free+0x350/0x350 [ 616.380466][ T1179] ? flush_workqueue_prep_pwqs+0x510/0x510 [ 616.386410][ T1179] ? mark_held_locks+0x9f/0xe0 [ 616.391173][ T1179] ? check_preemption_disabled+0x50/0x130 [ 616.397016][ T1179] ? check_preemption_disabled+0x50/0x130 [ 616.402753][ T1179] __cancel_work_timer+0x5bd/0x6c0 [ 616.408027][ T1179] ? get_max_files+0x10/0x10 [ 616.412635][ T1179] ? try_to_grab_pending.part.0+0x770/0x770 [ 616.418660][ T1179] ? lock_acquire+0x1f2/0xaa0 [ 616.423386][ T1179] ? __sock_release+0x86/0x280 [ 616.428301][ T1179] ? lock_release+0x890/0x890 [ 616.433021][ T1179] tls_sk_proto_close+0x4a7/0xaf0 [ 616.438164][ T1179] ? wait_on_pending_writer+0x3f0/0x3f0 [ 616.443784][ T1179] ? ip_mc_drop_socket+0x16/0x260 [ 616.448935][ T1179] inet_release+0x12e/0x280 [ 616.453485][ T1179] inet6_release+0x4c/0x70 [ 616.458177][ T1179] __sock_release+0xcd/0x280 [ 616.462780][ T1179] sock_close+0x18/0x20 [ 616.467035][ T1179] __fput+0x285/0x920 [ 616.471021][ T1179] ? __sock_release+0x280/0x280 [ 616.475867][ T1179] task_work_run+0xdd/0x190 [ 616.480490][ T1179] exit_to_user_mode_prepare+0x1e2/0x1f0 [ 616.486224][ T1179] syscall_exit_to_user_mode+0x7a/0x2c0 [ 616.491772][ T1179] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.497804][ T1179] RIP: 0033:0x403ae0 [ 616.501710][ T1179] Code: Bad RIP value. [ 616.505767][ T1179] RSP: 002b:00007ffec79b02c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 616.514244][ T1179] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403ae0 [ 616.522337][ T1179] RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 [ 616.530396][ T1179] RBP: 00007ffec79b02d0 R08: 0000000000000000 R09: 00000000000000d8 [ 616.538491][ T1179] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec79b02e0 [ 616.546540][ T1179] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 616.554584][ T1179] [ 616.554584][ T1179] Showing all locks held in the system: [ 616.562378][ T1179] 1 lock held by khungtaskd/1179: [ 616.567505][ T1179] #0: ffffffff8a503c80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.577626][ T1179] 3 locks held by kworker/0:3/7098: [ 616.582851][ T1179] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 616.593281][ T1179] #1: ffffc90001ab7da8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 616.606425][ T1179] #2: ffff8880a75420d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 616.615986][ T1179] 1 lock held by syz-executor129/7102: [ 616.621492][ T1179] #0: ffff888085560210 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 616.632169][ T1179] [ 616.634507][ T1179] ============================================= [ 616.634507][ T1179] [ 616.642968][ T1179] NMI backtrace for cpu 1 [ 616.647376][ T1179] CPU: 1 PID: 1179 Comm: khungtaskd Not tainted 5.9.0-rc6-next-20200922-syzkaller #0 [ 616.656823][ T1179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.666872][ T1179] Call Trace: [ 616.670205][ T1179] dump_stack+0x198/0x1fb [ 616.674530][ T1179] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.679735][ T1179] ? lapic_can_unplug_cpu+0x80/0x80 [ 616.684968][ T1179] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 616.690971][ T1179] watchdog+0xd89/0xf30 [ 616.695129][ T1179] ? trace_sched_process_hang+0x280/0x280 [ 616.700834][ T1179] kthread+0x3af/0x4a0 [ 616.704933][ T1179] ? __kthread_bind_mask+0xc0/0xc0 [ 616.710033][ T1179] ret_from_fork+0x1f/0x30 [ 616.714614][ T1179] Sending NMI from CPU 1 to CPUs 0: [ 616.720113][ C0] NMI backtrace for cpu 0 [ 616.720121][ C0] CPU: 0 PID: 3915 Comm: systemd-journal Not tainted 5.9.0-rc6-next-20200922-syzkaller #0 [ 616.720128][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.720134][ C0] RIP: 0010:fpregs_assert_state_consistent+0x0/0xe0 [ 616.720146][ C0] Code: 00 eb de 48 89 df e8 7f 79 8b 00 eb ab e8 b8 79 8b 00 e9 78 ff ff ff 48 c7 c7 40 94 af 8b e8 27 79 8b 00 e9 38 ff ff ff 66 90 <41> 54 55 53 e8 e7 1c 4a 00 be 08 00 00 00 65 48 8b 2c 25 c0 fe 01 [ 616.720151][ C0] RSP: 0018:ffffc90001657f18 EFLAGS: 00000046 [ 616.720163][ C0] RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff817b079d [ 616.720169][ C0] RDX: 0000000000000001 RSI: ffffffff883dd966 RDI: ffffc90001657f58 [ 616.720175][ C0] RBP: ffffc90001657f58 R08: 0000000000000001 R09: 0000000000000001 [ 616.720181][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 616.720187][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 616.720193][ C0] FS: 00007fb483ba28c0(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 616.720199][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.720205][ C0] CR2: 00007fb480f49000 CR3: 0000000092d66000 CR4: 00000000001506f0 [ 616.720211][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.720217][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.720220][ C0] Call Trace: [ 616.720225][ C0] exit_to_user_mode_prepare+0x46/0x1f0 [ 616.720230][ C0] syscall_exit_to_user_mode+0x7a/0x2c0 [ 616.720235][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.720239][ C0] RIP: 0033:0x7fb482e5e9c7 [ 616.720251][ C0] 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 [ 616.720256][ C0] RSP: 002b:00007ffe516b3998 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 616.720275][ C0] RAX: 0000000000000000 RBX: 00007ffe516b68b0 RCX: 00007fb482e5e9c7 [ 616.720281][ C0] RDX: 00007fb4838cfa00 RSI: 0000000000000000 RDI: 0000560f7ba5e9a3 [ 616.720287][ C0] RBP: 00007ffe516b39d0 R08: 0000000000000000 R09: 0000000000000000 [ 616.720293][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 616.720299][ C0] R13: 0000000000000000 R14: 00007ffe516b68b0 R15: 00007ffe516b3ec0 [ 616.720928][ T1179] Kernel panic - not syncing: hung_task: blocked tasks [ 616.955168][ T1179] CPU: 1 PID: 1179 Comm: khungtaskd Not tainted 5.9.0-rc6-next-20200922-syzkaller #0 [ 616.964597][ T1179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.974641][ T1179] Call Trace: [ 616.977917][ T1179] dump_stack+0x198/0x1fb [ 616.982227][ T1179] panic+0x382/0x7fb [ 616.986101][ T1179] ? __warn_printk+0xf3/0xf3 [ 616.990684][ T1179] ? lapic_can_unplug_cpu+0x80/0x80 [ 616.995862][ T1179] ? preempt_schedule_thunk+0x16/0x18 [ 617.001225][ T1179] ? watchdog.cold+0x22d/0x248 [ 617.006012][ T1179] ? watchdog+0xc59/0xf30 [ 617.010332][ T1179] watchdog.cold+0x23e/0x248 [ 617.014914][ T1179] ? trace_sched_process_hang+0x280/0x280 [ 617.020612][ T1179] kthread+0x3af/0x4a0 [ 617.024693][ T1179] ? __kthread_bind_mask+0xc0/0xc0 [ 617.029785][ T1179] ret_from_fork+0x1f/0x30 [ 617.035575][ T1179] Kernel Offset: disabled [ 617.039926][ T1179] Rebooting in 86400 seconds..