Warning: Permanently added '10.128.0.237' (ED25519) to the list of known hosts.
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[ 207.244528][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 207.244580][ C1] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16/2:b..l
[ 207.244617][ C1] rcu: (detected by 1, t=10502 jiffies, g=7637, q=4146 ncpus=2)
[ 207.244643][ C1] task:ktimers/0 state:R running task stack:23176 pid:16 tgid:16 ppid:2 task_flags:0x4208040 flags:0x00080000
[ 207.244707][ C1] Call Trace:
[ 207.244722][ C1]
[ 207.244733][ C1] __schedule+0x1480/0x50a0
[ 207.244807][ C1] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 207.244830][ C1] ? __pfx___schedule+0x10/0x10
[ 207.244869][ C1] ? _raw_spin_unlock_irq+0x23/0x50
[ 207.244889][ C1] schedule_rtlock+0x30/0x70
[ 207.244912][ C1] rtlock_slowlock_locked+0x3819/0x4010
[ 207.244956][ C1] ? rtlock_slowlock_locked+0x286/0x4010
[ 207.244976][ C1] ? do_raw_spin_lock+0x121/0x290
[ 207.245001][ C1] ? __pfx_rtlock_slowlock_locked+0x10/0x10
[ 207.245033][ C1] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 207.245061][ C1] rt_spin_lock+0x158/0x3e0
[ 207.245084][ C1] ? __pfx_rt_spin_lock+0x10/0x10
[ 207.245109][ C1] ? mix_interrupt_randomness+0x1a4/0x2d0
[ 207.245134][ C1] mix_interrupt_randomness+0x1b1/0x2d0
[ 207.245152][ C1] ? __pfx_mix_interrupt_randomness+0x10/0x10
[ 207.245184][ C1] call_timer_fn+0x16e/0x590
[ 207.245206][ C1] ? __pfx_mix_interrupt_randomness+0x10/0x10
[ 207.245222][ C1] ? __pfx_preempt_schedule+0x10/0x10
[ 207.245243][ C1] ? call_timer_fn+0xbe/0x590
[ 207.245265][ C1] ? __pfx_call_timer_fn+0x10/0x10
[ 207.245294][ C1] ? preempt_schedule_thunk+0x16/0x30
[ 207.245316][ C1] ? __pfx_mix_interrupt_randomness+0x10/0x10
[ 207.245335][ C1] __run_timer_base+0x648/0x970
[ 207.245372][ C1] ? __pfx___run_timer_base+0x10/0x10
[ 207.245409][ C1] run_timer_softirq+0x67/0x180
[ 207.245432][ C1] handle_softirqs+0x226/0x6d0
[ 207.245462][ C1] ? __pfx_handle_softirqs+0x10/0x10
[ 207.245492][ C1] run_ktimerd+0xcf/0x190
[ 207.245512][ C1] ? __pfx_run_ktimerd+0x10/0x10
[ 207.245531][ C1] ? schedule+0x91/0x360
[ 207.245560][ C1] ? smpboot_thread_fn+0x4d/0xa60
[ 207.245580][ C1] smpboot_thread_fn+0x542/0xa60
[ 207.245602][ C1] ? smpboot_thread_fn+0x4d/0xa60
[ 207.245631][ C1] kthread+0x711/0x8a0
[ 207.245662][ C1] ? __pfx_smpboot_thread_fn+0x10/0x10
[ 207.245682][ C1] ? __pfx_kthread+0x10/0x10
[ 207.245701][ C1] ? rt_spin_unlock+0x150/0x200
[ 207.245725][ C1] ? rt_spin_unlock+0x161/0x200
[ 207.245743][ C1] ? __pfx_kthread+0x10/0x10
[ 207.245766][ C1] ret_from_fork+0x599/0xb30
[ 207.245788][ C1] ? __pfx_ret_from_fork+0x10/0x10
[ 207.245822][ C1] ? __switch_to_asm+0x39/0x70
[ 207.245844][ C1] ? __switch_to_asm+0x33/0x70
[ 207.245863][ C1] ? __pfx_kthread+0x10/0x10
[ 207.245886][ C1] ret_from_fork_asm+0x1a/0x30
[ 207.245926][ C1]
[ 207.245938][ C1] rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g7637 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
[ 207.245956][ C1] rcu: Possible timer handling issue on cpu=0 timer-softirq=5947
[ 207.245966][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g7637 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 207.245984][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[ 207.245993][ C1] rcu: RCU grace-period kthread stack dump:
[ 207.245999][ C1] task:rcu_preempt state:I stack:27200 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
[ 207.246041][ C1] Call Trace:
[ 207.246047][ C1]
[ 207.246057][ C1] __schedule+0x1480/0x50a0
[ 207.246105][ C1] ? _raw_spin_unlock_irqrestore+0xfd/0x110
[ 207.246122][ C1] ? __pfx___schedule+0x10/0x10
[ 207.246158][ C1] ? schedule+0x91/0x360
[ 207.246183][ C1] schedule+0x165/0x360
[ 207.246207][ C1] schedule_timeout+0x12b/0x270
[ 207.246230][ C1] ? __pfx_schedule_timeout+0x10/0x10
[ 207.246250][ C1] ? preempt_schedule+0xae/0xc0
[ 207.246272][ C1] ? __pfx_process_timeout+0x10/0x10
[ 207.246298][ C1] ? prepare_to_swait_event+0x341/0x380
[ 207.246324][ C1] rcu_gp_fqs_loop+0x301/0x1540
[ 207.246356][ C1] ? __pfx_rcu_gp_init+0x10/0x10
[ 207.246378][ C1] ? lockdep_hardirqs_on+0x98/0x140
[ 207.246395][ C1] ? __pfx_rcu_gp_fqs_loop+0x10/0x10
[ 207.246414][ C1] ? _raw_spin_unlock_irq+0x2e/0x50
[ 207.246436][ C1] ? finish_swait+0xcd/0x1f0
[ 207.246458][ C1] rcu_gp_kthread+0x99/0x390
[ 207.246483][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10
[ 207.246505][ C1] ? __kthread_parkme+0x7b/0x200
[ 207.246525][ C1] ? __kthread_parkme+0x1a1/0x200
[ 207.246551][ C1] kthread+0x711/0x8a0
[ 207.246575][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10
[ 207.246597][ C1] ? __pfx_kthread+0x10/0x10
[ 207.246615][ C1] ? rt_spin_unlock+0x150/0x200
[ 207.246640][ C1] ? rt_spin_unlock+0x161/0x200
[ 207.246663][ C1] ? __pfx_kthread+0x10/0x10
[ 207.246686][ C1] ret_from_fork+0x599/0xb30
[ 207.246706][ C1] ? __pfx_ret_from_fork+0x10/0x10
[ 207.246735][ C1] ? __switch_to_asm+0x39/0x70
[ 207.246755][ C1] ? __switch_to_asm+0x33/0x70
[ 207.246775][ C1] ? __pfx_kthread+0x10/0x10
[ 207.246798][ C1] ret_from_fork_asm+0x1a/0x30
[ 207.246836][ C1]
[ 207.246842][ C1] rcu: Stack dump where RCU GP kthread last ran:
[ 207.246855][ C1] Sending NMI from CPU 1 to CPUs 0:
[ 207.246887][ C0] NMI backtrace for cpu 0
[ 207.246913][ C0] CPU: 0 UID: 0 PID: 5827 Comm: syz-executor154 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 207.246952][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 207.246972][ C0] RIP: 0010:__sanitizer_cov_trace_switch+0x9c/0x150
[ 207.246995][ C0] Code: 48 8b 54 24 30 65 4c 8b 04 25 08 d0 b1 91 45 31 c9 41 ba 00 01 00 00 eb 0c 49 ff c1 4c 39 c8 0f 84 86 00 00 00 4e 8b 5c ce 10 <65> 8b 2d bd 66 f1 0f 81 e5 00 00 ff 00 41 8b 98 7c 0b 00 00 44 21
[ 207.247007][ C0] RSP: 0000:ffffc90004c7f588 EFLAGS: 00000202
[ 207.247020][ C0] RAX: 0000000000000006 RBX: 0000000000000000 RCX: 0000000000000001
[ 207.247029][ C0] RDX: ffffffff847c5685 RSI: ffffffff8dcdefd0 RDI: 0000000000000002
[ 207.247039][ C0] RBP: 0000000000000000 R08: ffff88803451bc80 R09: 0000000000000004
[ 207.247048][ C0] R10: 0000000000000100 R11: 0000000000000004 R12: ffffc90004c7f990
[ 207.247057][ C0] R13: 0000000000000f40 R14: 0000000000000000 R15: 0000000000000002
[ 207.247067][ C0] FS: 00007f51d5e456c0(0000) GS:ffff888126d03000(0000) knlGS:0000000000000000
[ 207.247079][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 207.247090][ C0] CR2: 00007f51d5f1729c CR3: 0000000036e5e000 CR4: 00000000003526f0
[ 207.247103][ C0] Call Trace:
[ 207.247109][ C0]
[ 207.247117][ C0] _copy_from_iter+0x185/0x1630
[ 207.247136][ C0] ? do_raw_spin_unlock+0x122/0x240
[ 207.247157][ C0] ? __pfx__copy_from_iter+0x10/0x10
[ 207.247174][ C0] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 207.247192][ C0] ? rt_spin_unlock+0x150/0x200
[ 207.247211][ C0] ? rt_spin_unlock+0x161/0x200
[ 207.247229][ C0] write_pool_user+0xeb/0x2c0
[ 207.247244][ C0] ? __pfx_write_pool_user+0x10/0x10
[ 207.247261][ C0] ? __asan_memset+0x22/0x50
[ 207.247282][ C0] iter_file_splice_write+0x977/0x10b0
[ 207.247310][ C0] ? __pfx_iter_file_splice_write+0x10/0x10
[ 207.247326][ C0] ? __pfx_copy_splice_read+0x10/0x10
[ 207.247342][ C0] ? __pfx_iter_file_splice_write+0x10/0x10
[ 207.247360][ C0] ? __pfx_iter_file_splice_write+0x10/0x10
[ 207.247375][ C0] direct_splice_actor+0x104/0x160
[ 207.247392][ C0] splice_direct_to_actor+0x5b3/0xcd0
[ 207.247422][ C0] ? __pfx_direct_splice_actor+0x10/0x10
[ 207.247436][ C0] ? __pfx_splice_direct_to_actor+0x10/0x10
[ 207.247457][ C0] do_splice_direct+0x187/0x270
[ 207.247473][ C0] ? __pfx_do_splice_direct+0x10/0x10
[ 207.247488][ C0] ? __pfx_direct_file_splice_eof+0x10/0x10
[ 207.247507][ C0] ? rw_verify_area+0x25b/0x4e0
[ 207.247527][ C0] do_sendfile+0x4ec/0x7f0
[ 207.247546][ C0] ? __pfx_do_sendfile+0x10/0x10
[ 207.247563][ C0] ? __se_sys_futex+0x36f/0x400
[ 207.247585][ C0] __se_sys_sendfile64+0x13e/0x190
[ 207.247600][ C0] ? __pfx___se_sys_sendfile64+0x10/0x10
[ 207.247617][ C0] ? do_syscall_64+0xbe/0xf80
[ 207.247633][ C0] do_syscall_64+0xfa/0xf80
[ 207.247646][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 207.247661][ C0] ? clear_bhb_loop+0x60/0xb0
[ 207.247677][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 207.247690][ C0] RIP: 0033:0x7f51d5e8cb59
[ 207.247709][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
[ 207.247720][ C0] RSP: 002b:00007f51d5e45168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
[ 207.247734][ C0] RAX: ffffffffffffffda RBX: 00007f51d5f16328 RCX: 00007f51d5e8cb59
[ 207.247745][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
[ 207.247753][ C0] RBP: 00007f51d5f16320 R08: 00007f51d5e456c0 R09: 0000000000000000
[ 207.247763][ C0] R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f51d5f1632c
[ 207.247773][ C0] R13: 0000000000000000 R14: 00007ffe6eca64a0 R15: 00007ffe6eca6588
[ 207.247791][ C0]