Warning: Permanently added '10.128.0.241' (ECDSA) to the list of known hosts. syzkaller login: [ 586.183424][ T6834] IPVS: ftp: loaded support on port[0] = 21 [ 586.273620][ T6834] chnl_net:caif_netlink_parms(): no params data found [ 586.326398][ T6834] bridge0: port 1(bridge_slave_0) entered blocking state [ 586.334629][ T6834] bridge0: port 1(bridge_slave_0) entered disabled state [ 586.343542][ T6834] device bridge_slave_0 entered promiscuous mode [ 586.352722][ T6834] bridge0: port 2(bridge_slave_1) entered blocking state [ 586.359978][ T6834] bridge0: port 2(bridge_slave_1) entered disabled state [ 586.368197][ T6834] device bridge_slave_1 entered promiscuous mode [ 586.387614][ T6834] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 586.398668][ T6834] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 586.420361][ T6834] team0: Port device team_slave_0 added [ 586.427888][ T6834] team0: Port device team_slave_1 added [ 586.445416][ T6834] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 586.452428][ T6834] 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. [ 586.478546][ T6834] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 586.491091][ T6834] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 586.498045][ T6834] 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. [ 586.524013][ T6834] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 586.582948][ T6834] device hsr_slave_0 entered promiscuous mode [ 586.640405][ T6834] device hsr_slave_1 entered promiscuous mode [ 586.787660][ T6834] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 586.843885][ T6834] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 586.892947][ T6834] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 586.953285][ T6834] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 587.027582][ T6834] bridge0: port 2(bridge_slave_1) entered blocking state [ 587.034817][ T6834] bridge0: port 2(bridge_slave_1) entered forwarding state [ 587.042884][ T6834] bridge0: port 1(bridge_slave_0) entered blocking state [ 587.050061][ T6834] bridge0: port 1(bridge_slave_0) entered forwarding state [ 587.098477][ T6834] 8021q: adding VLAN 0 to HW filter on device bond0 [ 587.112634][ T6826] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 587.124558][ T6826] bridge0: port 1(bridge_slave_0) entered disabled state [ 587.133840][ T6826] bridge0: port 2(bridge_slave_1) entered disabled state [ 587.142433][ T6826] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 587.155896][ T6834] 8021q: adding VLAN 0 to HW filter on device team0 [ 587.168202][ T2530] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 587.177846][ T2530] bridge0: port 1(bridge_slave_0) entered blocking state [ 587.185016][ T2530] bridge0: port 1(bridge_slave_0) entered forwarding state [ 587.202681][ T6826] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 587.211188][ T6826] bridge0: port 2(bridge_slave_1) entered blocking state [ 587.218267][ T6826] bridge0: port 2(bridge_slave_1) entered forwarding state [ 587.234902][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 587.244537][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 587.256278][ T6826] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 587.266580][ T6826] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 587.282520][ T6834] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 587.293336][ T6834] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 587.306680][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 587.315474][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 587.325429][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 587.334281][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 587.344027][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 587.367319][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 587.374914][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 587.388564][ T6834] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 587.411210][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 587.420314][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 587.441262][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 587.450433][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 587.460476][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 587.468767][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 587.478784][ T6834] device veth0_vlan entered promiscuous mode [ 587.491479][ T6834] device veth1_vlan entered promiscuous mode [ 587.513729][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 587.523754][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 587.532394][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 587.541365][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 587.552082][ T6834] device veth0_macvtap entered promiscuous mode [ 587.563903][ T6834] device veth1_macvtap entered promiscuous mode [ 587.580992][ T6834] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 587.588501][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 587.598268][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 587.606663][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 587.615417][ T3350] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 587.628119][ T6834] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 587.635823][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 587.644732][ T2526] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 587.835544][ C0] hrtimer: interrupt took 6348918 ns [ 745.777878][ T1155] INFO: task kworker/0:5:2530 blocked for more than 144 seconds. [ 745.791260][ T1155] Not tainted 5.8.0-rc6-syzkaller #0 [ 745.797091][ T1155] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 745.811013][ T1155] kworker/0:5 D26496 2530 2 0x00004000 [ 745.817542][ T1155] Workqueue: events free_ipc [ 745.823518][ T1155] Call Trace: [ 745.826940][ T1155] __schedule+0x91f/0x2250 [ 745.832646][ T1155] ? io_schedule_timeout+0x140/0x140 [ 745.838042][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 745.845552][ T1155] ? trace_hardirqs_on+0x5f/0x220 [ 745.851449][ T1155] ? lockdep_hardirqs_on+0x6a/0xe0 [ 745.856586][ T1155] schedule+0xd0/0x2a0 [ 745.861939][ T1155] schedule_timeout+0x1d8/0x250 [ 745.866930][ T1155] ? usleep_range+0x170/0x170 [ 745.873015][ T1155] ? mark_held_locks+0x9f/0xe0 [ 745.877866][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 745.884636][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 745.891539][ T1155] ? trace_hardirqs_on+0x5f/0x220 [ 745.896594][ T1155] wait_for_completion+0x163/0x260 [ 745.903036][ T1155] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 745.909560][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 745.916879][ T1155] ? lockdep_hardirqs_on+0x6a/0xe0 [ 745.922996][ T1155] __wait_rcu_gp+0x217/0x2d0 [ 745.927639][ T1155] ? lock_is_held_type+0xb0/0xe0 [ 745.933881][ T1155] synchronize_rcu+0x10a/0x180 [ 745.938675][ T1155] ? synchronize_rcu_expedited+0x5f0/0x5f0 [ 745.945824][ T1155] ? rcu_qs+0x110/0x110 [ 745.950858][ T1155] ? process_one_work+0x85f/0x1670 [ 745.955996][ T1155] ? rcu_tasks_pregp_step+0x10/0x10 [ 745.962494][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 745.967720][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 745.974390][ T1155] kern_unmount+0x67/0xe0 [ 745.978746][ T1155] free_ipc+0xbe/0x1b0 [ 745.984129][ T1155] process_one_work+0x94c/0x1670 [ 745.989103][ T1155] ? lock_release+0x8d0/0x8d0 [ 745.995185][ T1155] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 746.001482][ T1155] ? rwlock_bug.part.0+0x90/0x90 [ 746.006448][ T1155] ? lockdep_hardirqs_off+0x66/0xa0 [ 746.013006][ T1155] worker_thread+0x64c/0x1120 [ 746.017769][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 746.025122][ T1155] ? process_one_work+0x1670/0x1670 [ 746.031245][ T1155] kthread+0x3b5/0x4a0 [ 746.035347][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.041759][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.047085][ T1155] ret_from_fork+0x1f/0x30 [ 746.053071][ T1155] INFO: task syz-executor643:6834 blocked for more than 144 seconds. [ 746.062322][ T1155] Not tainted 5.8.0-rc6-syzkaller #0 [ 746.068150][ T1155] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 746.078251][ T1155] syz-executor643 D24000 6834 6833 0xa0024002 [ 746.085498][ T1155] Call Trace: [ 746.088822][ T1155] __schedule+0x91f/0x2250 [ 746.094588][ T1155] ? io_schedule_timeout+0x140/0x140 [ 746.100804][ T1155] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 746.106734][ T1155] schedule+0xd0/0x2a0 [ 746.112155][ T1155] schedule_timeout+0x1d8/0x250 [ 746.117043][ T1155] ? usleep_range+0x170/0x170 [ 746.123257][ T1155] ? mark_held_locks+0x9f/0xe0 [ 746.128062][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 746.134638][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 746.141623][ T1155] ? trace_hardirqs_on+0x5f/0x220 [ 746.146685][ T1155] wait_for_completion+0x163/0x260 [ 746.153127][ T1155] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 746.159661][ T1155] ? lock_is_held_type+0xb0/0xe0 [ 746.166009][ T1155] rcu_barrier+0x2d1/0x4a0 [ 746.171426][ T1155] ? __tun_detach+0x1310/0x1310 [ 746.176366][ T1155] netdev_run_todo+0x100/0xac0 [ 746.182487][ T1155] ? sk_destruct+0xbd/0xe0 [ 746.186932][ T1155] ? __sk_free+0xef/0x3d0 [ 746.192761][ T1155] ? default_device_exit_batch+0x3d0/0x3d0 [ 746.198598][ T1155] ? lock_is_held_type+0xb0/0xe0 [ 746.204839][ T1155] ? __tun_detach+0x1310/0x1310 [ 746.209725][ T1155] tun_chr_close+0xf5/0x180 [ 746.215601][ T1155] __fput+0x33c/0x880 [ 746.219610][ T1155] task_work_run+0xdd/0x190 [ 746.225495][ T1155] do_exit+0xb72/0x2a40 [ 746.229690][ T1155] ? mm_update_next_owner+0x7a0/0x7a0 [ 746.236553][ T1155] ? vmacache_update+0xce/0x140 [ 746.243247][ T1155] do_group_exit+0x125/0x310 [ 746.247874][ T1155] __ia32_sys_exit_group+0x3a/0x50 [ 746.254221][ T1155] do_syscall_32_irqs_on+0x3f/0x60 [ 746.259357][ T1155] do_fast_syscall_32+0x7f/0x120 [ 746.265564][ T1155] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 746.272859][ T1155] RIP: 0023:0xf7fef569 [ 746.276950][ T1155] Code: Bad RIP value. [ 746.282389][ T1155] RSP: 002b:00000000ffdacd8c EFLAGS: 00000292 ORIG_RAX: 00000000000000fc [ 746.291693][ T1155] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000080f7b38 [ 746.299684][ T1155] RDX: 0000000000000000 RSI: 00000000080dffbc RDI: 00000000080f7b40 [ 746.309030][ T1155] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 746.317955][ T1155] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 746.326832][ T1155] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 746.335921][ T1155] [ 746.335921][ T1155] Showing all locks held in the system: [ 746.344619][ T1155] 1 lock held by khungtaskd/1155: [ 746.349658][ T1155] #0: ffffffff89bc11c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 746.360943][ T1155] 2 locks held by kworker/0:5/2530: [ 746.366153][ T1155] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 746.377839][ T1155] #1: ffffc9000804fda8 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 746.388631][ T1155] 1 lock held by in:imklog/6529: [ 746.394440][ T1155] #0: ffff88809f8eadf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 746.404552][ T1155] 1 lock held by syz-executor643/6834: [ 746.410886][ T1155] #0: ffffffff89bc5728 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x4a0 [ 746.421748][ T1155] [ 746.424090][ T1155] ============================================= [ 746.424090][ T1155] [ 746.433972][ T1155] NMI backtrace for cpu 1 [ 746.438337][ T1155] CPU: 1 PID: 1155 Comm: khungtaskd Not tainted 5.8.0-rc6-syzkaller #0 [ 746.446578][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 746.456638][ T1155] Call Trace: [ 746.460049][ T1155] dump_stack+0x18f/0x20d [ 746.464399][ T1155] nmi_cpu_backtrace.cold+0x70/0xb1 [ 746.469689][ T1155] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 746.475345][ T1155] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 746.481377][ T1155] watchdog+0xd7d/0x1000 [ 746.485639][ T1155] ? reset_hung_task_detector+0x30/0x30 [ 746.491198][ T1155] kthread+0x3b5/0x4a0 [ 746.495277][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.500399][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.505526][ T1155] ret_from_fork+0x1f/0x30 [ 746.510058][ T1155] Sending NMI from CPU 1 to CPUs 0: [ 746.516305][ T1155] NMI backtrace for cpu 0 [ 746.516313][ T1155] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc6-syzkaller #0 [ 746.516321][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 746.516326][ T1155] RIP: 0010:advance_sched+0x455/0x990 [ 746.516342][ T1155] Code: 08 84 d2 0f 85 99 04 00 00 41 89 6c 24 20 e8 72 be 10 fb 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 80 3c 02 00 <0f> 85 4c 04 00 00 48 8b 7c 24 18 4c 89 63 e8 e8 d7 64 85 01 48 8d [ 746.516347][ T1155] RSP: 0018:ffffc90000007d78 EFLAGS: 00000046 [ 746.516357][ T1155] RAX: dffffc0000000000 RBX: ffff88809dc04b40 RCX: ffffffff8662fdea [ 746.516364][ T1155] RDX: 1ffff11013b80965 RSI: ffffffff8662fe1e RDI: ffff8880a74c71a0 [ 746.516370][ T1155] RBP: 0000000000000a00 R08: 0000000000000001 R09: ffff8880a74c71a3 [ 746.516377][ T1155] R10: ffffed1014e98e34 R11: 0000000000000000 R12: ffff8880a74c7180 [ 746.516384][ T1155] R13: 1623e9f81cc16400 R14: ffff8880a74c71a0 R15: 1623e9f81cc16400 [ 746.516391][ T1155] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 746.516397][ T1155] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 746.516404][ T1155] CR2: 00000000080a8270 CR3: 0000000009a79000 CR4: 00000000001406f0 [ 746.516411][ T1155] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 746.516418][ T1155] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 746.516421][ T1155] Call Trace: [ 746.516424][ T1155] [ 746.516429][ T1155] __hrtimer_run_queues+0x6a9/0xfc0 [ 746.516434][ T1155] ? taprio_dequeue_soft+0xa40/0xa40 [ 746.516439][ T1155] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 746.516445][ T1155] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 746.516449][ T1155] hrtimer_interrupt+0x32a/0x930 [ 746.516455][ T1155] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 746.516459][ T1155] asm_call_on_stack+0xf/0x20 [ 746.516462][ T1155] [ 746.516467][ T1155] sysvec_apic_timer_interrupt+0xe0/0x120 [ 746.516473][ T1155] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 746.516478][ T1155] RIP: 0010:native_safe_halt+0xe/0x10 [ 746.516493][ T1155] Code: ff 4c 89 ef e8 53 c8 ca f9 e9 8e fe ff ff 48 89 df e8 46 c8 ca f9 eb 8a cc cc cc cc e9 07 00 00 00 0f 00 2d 74 5f 60 00 fb f4 90 e9 07 00 00 00 0f 00 2d 64 5f 60 00 f4 c3 cc cc 55 53 e8 29 [ 746.516498][ T1155] RSP: 0018:ffffffff89a07c70 EFLAGS: 00000293 [ 746.516508][ T1155] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 746.516514][ T1155] RDX: ffffffff89a86580 RSI: ffffffff87e85c48 RDI: ffffffff87e85c1e [ 746.516521][ T1155] RBP: ffff8880a7120064 R08: 0000000000000000 R09: 0000000000000000 [ 746.516528][ T1155] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a7120064 [ 746.516535][ T1155] R13: 1ffffffff1340f98 R14: ffff8880a7120065 R15: 0000000000000001 [ 746.516539][ T1155] ? acpi_safe_halt+0x88/0x110 [ 746.516543][ T1155] ? acpi_safe_halt+0x5e/0x110 [ 746.516548][ T1155] acpi_safe_halt+0x8d/0x110 [ 746.516552][ T1155] acpi_idle_do_entry+0x15c/0x1b0 [ 746.516557][ T1155] acpi_idle_enter+0x3f9/0xab0 [ 746.516562][ T1155] ? acpi_idle_enter_bm+0x2d0/0x2d0 [ 746.516566][ T1155] ? kvm_sched_clock_read+0x14/0x40 [ 746.516571][ T1155] ? sched_clock+0x2a/0x40 [ 746.516575][ T1155] ? sched_clock_cpu+0x18/0x1b0 [ 746.516580][ T1155] cpuidle_enter_state+0xff/0x960 [ 746.516585][ T1155] ? tick_nohz_idle_stop_tick+0xfa/0xc40 [ 746.516589][ T1155] cpuidle_enter+0x4a/0xa0 [ 746.516593][ T1155] do_idle+0x431/0x6d0 [ 746.516598][ T1155] ? arch_cpu_idle_exit+0x70/0x70 [ 746.516603][ T1155] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 746.516607][ T1155] cpu_startup_entry+0x14/0x20 [ 746.516612][ T1155] start_kernel+0x9cb/0xa06 [ 746.516616][ T1155] ? mem_encrypt_init+0x5/0x5 [ 746.516621][ T1155] ? x86_cpuid_vendor+0x84/0x90 [ 746.516626][ T1155] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 746.516630][ T1155] ? load_ucode_bsp+0x1b7/0x1f7 [ 746.516635][ T1155] secondary_startup_64+0xa4/0xb0 [ 746.890239][ T1155] Kernel panic - not syncing: hung_task: blocked tasks [ 746.897189][ T1155] CPU: 1 PID: 1155 Comm: khungtaskd Not tainted 5.8.0-rc6-syzkaller #0 [ 746.905552][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 746.915637][ T1155] Call Trace: [ 746.918958][ T1155] dump_stack+0x18f/0x20d [ 746.923391][ T1155] panic+0x2e3/0x75c [ 746.927311][ T1155] ? __warn_printk+0xf3/0xf3 [ 746.931923][ T1155] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 746.937583][ T1155] ? preempt_schedule_thunk+0x16/0x18 [ 746.942978][ T1155] ? watchdog.cold+0x5/0x16b [ 746.947583][ T1155] ? watchdog+0xa82/0x1000 [ 746.952015][ T1155] watchdog.cold+0x16/0x16b [ 746.956539][ T1155] ? reset_hung_task_detector+0x30/0x30 [ 746.962095][ T1155] kthread+0x3b5/0x4a0 [ 746.966172][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.971302][ T1155] ? __kthread_bind_mask+0xc0/0xc0 [ 746.976426][ T1155] ret_from_fork+0x1f/0x30 [ 748.072935][ T1155] Shutting down cpus with NMI [ 748.078841][ T1155] Kernel Offset: disabled [ 748.083175][ T1155] Rebooting in 86400 seconds..