Warning: Permanently added '10.128.1.215' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 87.739345][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.756797][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! executing program executing program [ 87.797346][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.806747][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.816081][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.826411][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.835197][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! executing program executing program executing program executing program executing program executing program executing program [ 87.878059][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 87.990586][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 87.990635][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! [ 88.001593][ T0] NOHZ tick-stop error: local softirq work is pending, handler #200!!! executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 200.756342][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 200.763855][ C1] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5819/3:b..l [ 200.773151][ C1] rcu: (detected by 1, t=10502 jiffies, g=12281, q=12 ncpus=2) [ 200.781552][ C1] task:sshd-session state:R running task stack:24536 pid:5819 tgid:5819 ppid:5817 task_flags:0x400140 flags:0x00080000 [ 200.795790][ C1] Call Trace: [ 200.799689][ C1] [ 200.802688][ C1] __schedule+0x150e/0x5070 [ 200.807419][ C1] ? start_xmit+0x1bc0/0x2c90 [ 200.812334][ C1] ? __pfx___schedule+0x10/0x10 [ 200.817258][ C1] ? preempt_schedule+0xae/0xc0 [ 200.822160][ C1] ? __dev_queue_xmit+0x289/0x3140 [ 200.827413][ C1] preempt_schedule_common+0x83/0xd0 [ 200.832752][ C1] preempt_schedule+0xae/0xc0 [ 200.837508][ C1] ? __pfx_preempt_schedule+0x10/0x10 [ 200.843045][ C1] ? preempt_schedule_notrace_thunk+0x16/0x30 [ 200.849177][ C1] preempt_schedule_thunk+0x16/0x30 [ 200.855024][ C1] __local_bh_enable_ip+0x13e/0x1c0 [ 200.860374][ C1] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 200.867035][ C1] ? __dev_queue_xmit+0x289/0x3140 [ 200.873347][ C1] ? __dev_queue_xmit+0x289/0x3140 [ 200.878905][ C1] ? __dev_queue_xmit+0x289/0x3140 [ 200.884724][ C1] __dev_queue_xmit+0x1955/0x3140 [ 200.889823][ C1] ? __dev_queue_xmit+0x289/0x3140 [ 200.895082][ C1] ? rcu_is_watching+0x15/0xb0 [ 200.900258][ C1] ? trace_irq_disable+0x37/0x100 [ 200.905335][ C1] ? __pfx___dev_queue_xmit+0x10/0x10 [ 200.911060][ C1] ? irqentry_exit+0x5dd/0x660 [ 200.915906][ C1] ? lockdep_hardirqs_on+0x98/0x140 [ 200.921170][ C1] ? irqentry_exit+0x5dd/0x660 [ 200.926797][ C1] ? rcu_is_watching+0x15/0xb0 [ 200.932039][ C1] ? ip_finish_output2+0xae7/0x1160 [ 200.937501][ C1] ip_finish_output2+0xd03/0x1160 [ 200.943402][ C1] ? ip_finish_output2+0x452/0x1160 [ 200.948785][ C1] ? __pfx_ip_finish_output2+0x10/0x10 [ 200.954405][ C1] ? ip_skb_dst_mtu+0x917/0xb70 [ 200.959319][ C1] ? ip_finish_output+0x33a/0x3f0 [ 200.964418][ C1] ip_output+0x29f/0x450 [ 200.968713][ C1] ? ip_output+0x5b/0x450 [ 200.973103][ C1] __ip_queue_xmit+0x118d/0x1c30 [ 200.978261][ C1] ? __pfx_cubictcp_cwnd_event+0x10/0x10 [ 200.984033][ C1] ? __ip_queue_xmit+0x5d/0x1c30 [ 200.989025][ C1] ? __pfx_ip_queue_xmit+0x10/0x10 [ 200.994222][ C1] __tcp_transmit_skb+0x24f6/0x3aa0 [ 200.999534][ C1] ? __pfx___tcp_transmit_skb+0x10/0x10 [ 201.005157][ C1] ? tcp_small_queue_check+0x1c1/0x3b0 [ 201.010683][ C1] tcp_write_xmit+0x16e8/0x6980 [ 201.015629][ C1] ? __pfx__copy_from_iter+0x10/0x10 [ 201.021063][ C1] __tcp_push_pending_frames+0x97/0x380 [ 201.026655][ C1] ? tcp_push+0x41d/0x660 [ 201.031041][ C1] tcp_sendmsg_locked+0x475a/0x5520 [ 201.036478][ C1] ? __pfx_tcp_sendmsg_locked+0x10/0x10 [ 201.042227][ C1] ? __local_bh_enable_ip+0x12d/0x1c0 [ 201.047671][ C1] ? __local_bh_enable_ip+0x12d/0x1c0 [ 201.053103][ C1] ? do_raw_spin_unlock+0x122/0x240 [ 201.058480][ C1] tcp_sendmsg+0x2f/0x50 [ 201.062876][ C1] sock_sendmsg_nosec+0x128/0x1d0 [ 201.068049][ C1] sock_write_iter+0x2d9/0x3d0 [ 201.072861][ C1] ? __pfx_sock_write_iter+0x10/0x10 [ 201.078212][ C1] ? bpf_lsm_file_permission+0x9/0x20 [ 201.083639][ C1] ? security_file_permission+0x75/0x290 [ 201.089419][ C1] vfs_write+0x5c9/0xb30 [ 201.093728][ C1] ? __pfx_sock_write_iter+0x10/0x10 [ 201.099057][ C1] ? __pfx_vfs_write+0x10/0x10 [ 201.104136][ C1] ? lockdep_hardirqs_on+0x98/0x140 [ 201.109493][ C1] ksys_write+0x145/0x250 [ 201.113889][ C1] ? __pfx_ksys_write+0x10/0x10 [ 201.118812][ C1] ? do_syscall_64+0xbe/0xf80 [ 201.123655][ C1] do_syscall_64+0xfa/0xf80 [ 201.128251][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 201.134397][ C1] ? clear_bhb_loop+0x60/0xb0 [ 201.139183][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 201.145141][ C1] RIP: 0033:0x7f6ed82a7407 [ 201.149805][ C1] RSP: 002b:00007ffde736b080 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 201.158876][ C1] RAX: ffffffffffffffda RBX: 00007f6ed8941300 RCX: 00007f6ed82a7407 [ 201.166996][ C1] RDX: 0000000000000034 RSI: 0000561512c30520 RDI: 0000000000000004 [ 201.175035][ C1] RBP: 0000561512c34050 R08: 0000000000000000 R09: 0000000000000000 [ 201.183237][ C1] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 201.191251][ C1] R13: 00007ffde736b1d0 R14: 0000000000000000 R15: 0000000000000004 [ 201.199368][ C1] [ 201.202441][ C1] rcu: rcu_preempt kthread starved for 10543 jiffies! g12281 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 201.213773][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 201.224392][ C1] rcu: RCU grace-period kthread stack dump: [ 201.230315][ C1] task:rcu_preempt state:R running task stack:27168 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 [ 201.244213][ C1] Call Trace: [ 201.247551][ C1] [ 201.250522][ C1] __schedule+0x150e/0x5070 [ 201.255110][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 201.261133][ C1] ? __pfx___schedule+0x10/0x10 [ 201.266037][ C1] ? schedule+0x91/0x360 [ 201.270414][ C1] schedule+0x165/0x360 [ 201.274626][ C1] schedule_timeout+0x12b/0x270 [ 201.279605][ C1] ? __pfx_schedule_timeout+0x10/0x10 [ 201.285021][ C1] ? __pfx_process_timeout+0x10/0x10 [ 201.290445][ C1] ? prepare_to_swait_event+0x341/0x380 [ 201.296232][ C1] rcu_gp_fqs_loop+0x301/0x1540 [ 201.301228][ C1] ? __pfx_rcu_gp_init+0x10/0x10 [ 201.306383][ C1] ? lockdep_hardirqs_on+0x98/0x140 [ 201.311639][ C1] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 201.317244][ C1] ? _raw_spin_unlock_irq+0x2e/0x50 [ 201.322583][ C1] ? finish_swait+0xcd/0x1f0 [ 201.327310][ C1] rcu_gp_kthread+0x99/0x390 [ 201.331964][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 201.338861][ C1] ? __kthread_parkme+0x7b/0x200 [ 201.343940][ C1] ? __kthread_parkme+0x1a1/0x200 [ 201.349009][ C1] kthread+0x711/0x8a0 [ 201.353146][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 201.358571][ C1] ? __pfx_kthread+0x10/0x10 [ 201.363388][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 201.368812][ C1] ? lockdep_hardirqs_on+0x98/0x140 [ 201.374150][ C1] ? __pfx_kthread+0x10/0x10 [ 201.378783][ C1] ret_from_fork+0x599/0xb30 [ 201.383412][ C1] ? __pfx_ret_from_fork+0x10/0x10 [ 201.388575][ C1] ? __switch_to_asm+0x39/0x70 [ 201.393387][ C1] ? __switch_to_asm+0x33/0x70 [ 201.398221][ C1] ? __pfx_kthread+0x10/0x10 [ 201.402892][ C1] ret_from_fork_asm+0x1a/0x30 [ 201.407851][ C1] [ 201.410923][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 201.417323][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) [ 201.426305][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 [ 201.436408][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 201.442271][ C1] Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 9e 2a 00 f3 0f 1e fa fb f4 48 ee 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 201.462003][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6 [ 201.468113][ C1] RAX: 7ee36df2471acc00 RBX: ffffffff819786ba RCX: 7ee36df2471acc00 [ 201.476143][ C1] RDX: 0000000000000001 RSI: ffffffff8d997e54 RDI: ffffffff8be07960 [ 201.484401][ C1] RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db [ 201.492423][ C1] R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8fa22f70 [ 201.500434][ C1] R13: 1ffff11003b56b70 R14: 0000000000000001 R15: 0000000000000001 [ 201.508530][ C1] FS: 0000000000000000(0000) GS:ffff888125d25000(0000) knlGS:0000000000000000 [ 201.517728][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 201.524434][ C1] CR2: 00007f91f62dc078 CR3: 0000000030fde000 CR4: 00000000003526f0 [ 201.532534][ C1] Call Trace: [ 201.535951][ C1] [ 201.538953][ C1] default_idle+0x13/0x20 [ 201.543319][ C1] default_idle_call+0x73/0xb0 [ 201.548118][ C1] do_idle+0x1ea/0x520 [ 201.552277][ C1] ? irqentry_exit+0x5ba/0x660 [ 201.557129][ C1] ? __pfx_do_idle+0x10/0x10 [ 201.561817][ C1] cpu_startup_entry+0x44/0x60 [ 201.566655][ C1] start_secondary+0x101/0x110 [ 201.571476][ C1] common_startup_64+0x13e/0x147 [ 201.576478][ C1]