[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 141.166405][ T8433] cron (8433) used greatest stack depth: 22744 bytes left Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. [ 476.810001][ T8442] chnl_net:caif_netlink_parms(): no params data found [ 476.859822][ T8442] bridge0: port 1(bridge_slave_0) entered blocking state [ 476.867545][ T8442] bridge0: port 1(bridge_slave_0) entered disabled state [ 476.875844][ T8442] device bridge_slave_0 entered promiscuous mode [ 476.885207][ T8442] bridge0: port 2(bridge_slave_1) entered blocking state [ 476.892396][ T8442] bridge0: port 2(bridge_slave_1) entered disabled state [ 476.900616][ T8442] device bridge_slave_1 entered promiscuous mode [ 476.920898][ T8442] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 476.931671][ T8442] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 476.953601][ T8442] team0: Port device team_slave_0 added [ 476.960670][ T8442] team0: Port device team_slave_1 added [ 476.978379][ T8442] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 476.985311][ T8442] 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. [ 477.011651][ T8442] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 477.024183][ T8442] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 477.031647][ T8442] 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. [ 477.057608][ T8442] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 477.084576][ T8442] device hsr_slave_0 entered promiscuous mode [ 477.092860][ T8442] device hsr_slave_1 entered promiscuous mode [ 477.192984][ T8442] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 477.203579][ T8442] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 477.215469][ T8442] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 477.224455][ T8442] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 477.250035][ T8442] bridge0: port 2(bridge_slave_1) entered blocking state [ 477.257280][ T8442] bridge0: port 2(bridge_slave_1) entered forwarding state [ 477.265075][ T8442] bridge0: port 1(bridge_slave_0) entered blocking state [ 477.272210][ T8442] bridge0: port 1(bridge_slave_0) entered forwarding state [ 477.311484][ T8442] 8021q: adding VLAN 0 to HW filter on device bond0 [ 477.325840][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 477.337434][ T29] bridge0: port 1(bridge_slave_0) entered disabled state [ 477.346721][ T29] bridge0: port 2(bridge_slave_1) entered disabled state [ 477.355373][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 477.369139][ T8442] 8021q: adding VLAN 0 to HW filter on device team0 [ 477.380901][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 477.389261][ T29] bridge0: port 1(bridge_slave_0) entered blocking state [ 477.396283][ T29] bridge0: port 1(bridge_slave_0) entered forwarding state [ 477.419672][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 477.428233][ T29] bridge0: port 2(bridge_slave_1) entered blocking state [ 477.435275][ T29] bridge0: port 2(bridge_slave_1) entered forwarding state [ 477.443736][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 477.452407][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 477.467244][ T8569] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 477.475214][ T8569] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 477.484320][ T8569] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 477.495648][ T8442] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 477.512841][ T8649] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 477.522023][ T8649] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 477.534104][ T8442] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 477.552091][ T8569] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 477.570301][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 477.580017][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 477.587568][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 477.597819][ T8442] device veth0_vlan entered promiscuous mode [ 477.611076][ T8442] device veth1_vlan entered promiscuous mode [ 477.631981][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 477.640381][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 477.650620][ T29] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 477.660433][ T8442] device veth0_macvtap entered promiscuous mode [ 477.672109][ T8442] device veth1_macvtap entered promiscuous mode [ 477.687043][ T8442] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 477.695748][ T8649] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 477.704955][ T8649] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 477.718831][ T8442] batman_adv: batadv0: Interface activated: batadv_slave_1 executing program [ 477.729223][ T8442] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 477.738709][ T8442] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 477.747499][ T8442] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 477.759740][ T8442] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 477.770176][ T8649] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 477.809903][ T8655] netlink: 'syz-executor618': attribute type 4 has an invalid length. [ 721.190816][ T1657] INFO: task syz-executor618:8655 blocked for more than 143 seconds. [ 721.199105][ T1657] Not tainted 5.14.0-rc4-syzkaller #0 [ 721.207651][ T1657] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.217904][ T1657] task:syz-executor618 state:D stack:23424 pid: 8655 ppid: 8442 flags:0x00000004 [ 721.228844][ T1657] Call Trace: [ 721.233743][ T1657] __schedule+0x93a/0x26f0 [ 721.238415][ T1657] ? io_schedule_timeout+0x140/0x140 [ 721.243840][ T1657] ? lock_chain_count+0x20/0x20 [ 721.248864][ T1657] schedule+0xd3/0x270 [ 721.253007][ T1657] schedule_timeout+0x1db/0x2a0 [ 721.257859][ T1657] ? usleep_range+0x170/0x170 [ 721.263835][ T1657] ? wait_for_completion+0x16e/0x280 [ 721.269248][ T1657] ? mark_held_locks+0x9f/0xe0 [ 721.274076][ T1657] ? rwlock_bug.part.0+0x90/0x90 [ 721.279027][ T1657] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.285678][ T1657] wait_for_completion+0x176/0x280 [ 721.290892][ T1657] ? __flush_work+0x4e0/0xad0 [ 721.295780][ T1657] ? bit_wait_io_timeout+0x160/0x160 [ 721.301983][ T1657] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.307211][ T1657] __flush_work+0x50e/0xad0 [ 721.313324][ T1657] ? debug_object_assert_init+0x246/0x2e0 [ 721.319123][ T1657] ? queue_delayed_work_on+0x120/0x120 [ 721.325371][ T1657] ? flush_workqueue_prep_pwqs+0x510/0x510 [ 721.331960][ T1657] ? mark_held_locks+0x9f/0xe0 [ 721.336720][ T1657] __cancel_work_timer+0x3f9/0x570 [ 721.343175][ T1657] ? try_to_grab_pending+0xd0/0xd0 [ 721.348313][ T1657] ? lock_release+0x720/0x720 [ 721.353794][ T1657] tls_sk_proto_close+0x4a7/0xaf0 [ 721.358962][ T1657] ? wait_on_pending_writer+0x430/0x430 [ 721.365402][ T1657] ? ip_mc_drop_socket+0x16/0x260 [ 721.370870][ T1657] inet_release+0x12e/0x280 [ 721.375401][ T1657] inet6_release+0x4c/0x70 [ 721.379873][ T1657] __sock_release+0xcd/0x280 [ 721.385442][ T1657] sock_close+0x18/0x20 [ 721.389784][ T1657] __fput+0x288/0x920 [ 721.394121][ T1657] ? __sock_release+0x280/0x280 [ 721.398988][ T1657] task_work_run+0xdd/0x1a0 [ 721.404083][ T1657] exit_to_user_mode_prepare+0x27e/0x290 [ 721.409773][ T1657] syscall_exit_to_user_mode+0x19/0x60 [ 721.415571][ T1657] do_syscall_64+0x42/0xb0 [ 721.420090][ T1657] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 721.426531][ T1657] RIP: 0033:0x405573 [ 721.431004][ T1657] RSP: 002b:00007fff974fd678 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 721.439449][ T1657] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000405573 [ 721.449481][ T1657] RDX: fffffffffffffe60 RSI: 00000000200005c0 RDI: 0000000000000005 [ 721.457640][ T1657] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffe60 [ 721.467292][ T1657] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff974fd690 [ 721.475666][ T1657] R13: 00000000000f4240 R14: 00000000004b8018 R15: 00000000004004b8 [ 721.484148][ T1657] [ 721.484148][ T1657] Showing all locks held in the system: [ 721.492464][ T1657] 1 lock held by khungtaskd/1657: [ 721.497504][ T1657] #0: ffffffff8b97c180 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.508236][ T1657] 1 lock held by in:imklog/8153: [ 721.514131][ T1657] #0: ffff888026c365f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.523883][ T1657] 3 locks held by kworker/0:4/8653: [ 721.529068][ T1657] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 [ 721.540812][ T1657] #1: ffffc90001b5fdb0 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 [ 721.554630][ T1657] #2: ffff888015c9f8d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 721.564693][ T1657] 1 lock held by syz-executor618/8655: [ 721.570138][ T1657] #0: ffff888036ab3bd0 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 721.582157][ T1657] [ 721.584547][ T1657] ============================================= [ 721.584547][ T1657] [ 721.593124][ T1657] NMI backtrace for cpu 1 [ 721.597546][ T1657] CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.14.0-rc4-syzkaller #0 [ 721.605854][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.615886][ T1657] Call Trace: [ 721.619150][ T1657] dump_stack_lvl+0xcd/0x134 [ 721.623794][ T1657] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.628973][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.634218][ T1657] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.640222][ T1657] watchdog+0xd0a/0xfc0 [ 721.644384][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 721.649913][ T1657] kthread+0x3e5/0x4d0 [ 721.653969][ T1657] ? set_kthread_struct+0x130/0x130 [ 721.659151][ T1657] ret_from_fork+0x1f/0x30 [ 721.663739][ T1657] Sending NMI from CPU 1 to CPUs 0: [ 721.669176][ C0] NMI backtrace for cpu 0 [ 721.669185][ C0] CPU: 0 PID: 50 Comm: kworker/u4:2 Not tainted 5.14.0-rc4-syzkaller #0 [ 721.669193][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.669202][ C0] Workqueue: 0x0 (events_unbound) [ 721.669217][ C0] RIP: 0010:wq_worker_running+0x3f/0x130 [ 721.669227][ C0] Code: 8d 60 68 48 89 c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e c0 00 00 00 8b 6b 68 <31> ff 89 ee e8 58 97 29 00 85 ed 74 69 e8 0f 90 29 00 48 8d 7b 60 [ 721.669241][ C0] RSP: 0018:ffffc90000f2fe38 EFLAGS: 00000246 [ 721.669251][ C0] RAX: 0000000000000000 RBX: ffff8880159d7600 RCX: 0000000000000000 [ 721.669260][ C0] RDX: 1ffff11002b3aecd RSI: ffffffff814d312f RDI: ffff888010a24818 [ 721.669268][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880151ed4c7 [ 721.669276][ C0] R10: ffffffff814d3126 R11: 0000000000000001 R12: ffff8880159d7668 [ 721.669284][ C0] R13: 0000000000000000 R14: ffff8880159d7600 R15: ffff888010869800 [ 721.669293][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 721.669301][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.669308][ C0] CR2: 00007f4bf0d9e000 CR3: 000000001d98c000 CR4: 00000000001506f0 [ 721.669316][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.669324][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.669331][ C0] Call Trace: [ 721.669335][ C0] worker_thread+0x15c/0x11f0 [ 721.669341][ C0] ? process_one_work+0x1630/0x1630 [ 721.669346][ C0] kthread+0x3e5/0x4d0 [ 721.669352][ C0] ? set_kthread_struct+0x130/0x130 [ 721.669357][ C0] ret_from_fork+0x1f/0x30 [ 721.670673][ T1657] Kernel panic - not syncing: hung_task: blocked tasks [ 721.841413][ T1657] CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.14.0-rc4-syzkaller #0 [ 721.849725][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.859762][ T1657] Call Trace: [ 721.863027][ T1657] dump_stack_lvl+0xcd/0x134 [ 721.867609][ T1657] panic+0x306/0x73d [ 721.871486][ T1657] ? __warn_printk+0xf3/0xf3 [ 721.876060][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.881258][ T1657] ? preempt_schedule_thunk+0x16/0x18 [ 721.886788][ T1657] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 721.892929][ T1657] ? watchdog.cold+0x5/0x158 [ 721.897536][ T1657] watchdog.cold+0x16/0x158 [ 721.902031][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 721.907562][ T1657] kthread+0x3e5/0x4d0 [ 721.911617][ T1657] ? set_kthread_struct+0x130/0x130 [ 721.916813][ T1657] ret_from_fork+0x1f/0x30 [ 721.922737][ T1657] Kernel Offset: disabled [ 721.927065][ T1657] Rebooting in 86400 seconds..