Warning: Permanently added '10.128.1.104' (ED25519) to the list of known hosts. executing program [ 53.167891][ T3501] FAULT_INJECTION: forcing a failure. [ 53.167891][ T3501] name failslab, interval 1, probability 0, space 0, times 1 [ 53.167973][ T3501] [ 53.167976][ T3501] ====================================================== [ 53.167978][ T3501] WARNING: possible circular locking dependency detected [ 53.167981][ T3501] 5.15.143-syzkaller #0 Not tainted [ 53.167986][ T3501] ------------------------------------------------------ [ 53.167988][ T3501] syz-executor310/3501 is trying to acquire lock: [ 53.167993][ T3501] ffffffff8c913cc0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x2c/0x60 [ 53.168026][ T3501] [ 53.168026][ T3501] but task is already holding lock: [ 53.168028][ T3501] ffff88807424c158 (&port->lock){-.-.}-{2:2}, at: tty_insert_flip_string_and_push_buffer+0x3a/0x390 [ 53.168054][ T3501] [ 53.168054][ T3501] which lock already depends on the new lock. [ 53.168054][ T3501] [ 53.168056][ T3501] [ 53.168056][ T3501] the existing dependency chain (in reverse order) is: [ 53.168059][ T3501] [ 53.168059][ T3501] -> #2 (&port->lock){-.-.}-{2:2}: [ 53.168070][ T3501] lock_acquire+0x1db/0x4f0 [ 53.168078][ T3501] _raw_spin_lock_irqsave+0xd1/0x120 [ 53.168087][ T3501] tty_port_default_wakeup+0x21/0x100 [ 53.168096][ T3501] serial8250_tx_chars+0x60d/0x800 [ 53.168104][ T3501] serial8250_handle_irq+0x505/0x600 [ 53.168111][ T3501] serial8250_default_handle_irq+0xc8/0x1e0 [ 53.168119][ T3501] serial8250_interrupt+0xa1/0x1e0 [ 53.168128][ T3501] __handle_irq_event_percpu+0x292/0xa70 [ 53.168137][ T3501] handle_irq_event+0xff/0x2b0 [ 53.168145][ T3501] handle_edge_irq+0x245/0xbf0 [ 53.168153][ T3501] __common_interrupt+0xd7/0x1f0 [ 53.168162][ T3501] common_interrupt+0x9f/0xc0 [ 53.168171][ T3501] asm_common_interrupt+0x22/0x40 [ 53.168179][ T3501] _raw_spin_unlock_irqrestore+0xd4/0x130 [ 53.168187][ T3501] uart_write+0x6af/0x930 [ 53.168195][ T3501] n_tty_write+0xd7e/0x1280 [ 53.168202][ T3501] file_tty_write+0x561/0x920 [ 53.168209][ T3501] vfs_write+0xacf/0xe50 [ 53.168217][ T3501] ksys_write+0x1a2/0x2c0 [ 53.168224][ T3501] do_syscall_64+0x3d/0xb0 [ 53.168232][ T3501] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 53.168241][ T3501] [ 53.168241][ T3501] -> #1 (&port_lock_key){-.-.}-{2:2}: [ 53.168251][ T3501] lock_acquire+0x1db/0x4f0 [ 53.168258][ T3501] _raw_spin_lock_irqsave+0xd1/0x120 [ 53.168266][ T3501] serial8250_console_write+0x19d/0x1180 [ 53.168273][ T3501] console_unlock+0xced/0x12b0 [ 53.168280][ T3501] vprintk_emit+0xbf/0x150 [ 53.168287][ T3501] _printk+0xd1/0x111 [ 53.168294][ T3501] register_console+0x68c/0x970 [ 53.168301][ T3501] univ8250_console_init+0x41/0x43 [ 53.168309][ T3501] console_init+0x18c/0x652 [ 53.168317][ T3501] start_kernel+0x301/0x535 [ 53.168325][ T3501] secondary_startup_64_no_verify+0xb1/0xbb [ 53.168334][ T3501] [ 53.168334][ T3501] -> #0 (console_owner){....}-{0:0}: [ 53.168345][ T3501] validate_chain+0x1649/0x5930 [ 53.168353][ T3501] __lock_acquire+0x1295/0x1ff0 [ 53.168360][ T3501] lock_acquire+0x1db/0x4f0 [ 53.168367][ T3501] console_lock_spinning_enable+0x51/0x60 [ 53.168376][ T3501] console_unlock+0xa47/0x12b0 [ 53.168384][ T3501] vprintk_emit+0xbf/0x150 [ 53.168391][ T3501] _printk+0xd1/0x111 [ 53.168398][ T3501] should_fail+0x36c/0x4c0 [ 53.168406][ T3501] should_failslab+0x5/0x20 [ 53.168414][ T3501] slab_pre_alloc_hook+0x53/0xc0 [ 53.168423][ T3501] __kmalloc+0x6e/0x300 [ 53.168430][ T3501] __tty_buffer_request_room+0x1ef/0x500 [ 53.168439][ T3501] tty_insert_flip_string_and_push_buffer+0x7c/0x390 [ 53.168448][ T3501] n_tty_write+0x63c/0x1280 [ 53.168455][ T3501] file_tty_write+0x561/0x920 [ 53.168462][ T3501] vfs_write+0xacf/0xe50 [ 53.168469][ T3501] ksys_write+0x1a2/0x2c0 [ 53.168476][ T3501] do_syscall_64+0x3d/0xb0 [ 53.168484][ T3501] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 53.168492][ T3501] [ 53.168492][ T3501] other info that might help us debug this: [ 53.168492][ T3501] [ 53.168495][ T3501] Chain exists of: [ 53.168495][ T3501] console_owner --> &port_lock_key --> &port->lock [ 53.168495][ T3501] [ 53.168506][ T3501] Possible unsafe locking scenario: [ 53.168506][ T3501] [ 53.168508][ T3501] CPU0 CPU1 [ 53.168510][ T3501] ---- ---- [ 53.168512][ T3501] lock(&port->lock); [ 53.168517][ T3501] lock(&port_lock_key); [ 53.168522][ T3501] lock(&port->lock); [ 53.168527][ T3501] lock(console_owner); [ 53.168532][ T3501] [ 53.168532][ T3501] *** DEADLOCK *** [ 53.168532][ T3501] [ 53.168534][ T3501] 6 locks held by syz-executor310/3501: [ 53.168539][ T3501] #0: ffff8880799ed098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 [ 53.168559][ T3501] #1: ffff8880799ed130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 [ 53.168579][ T3501] #2: ffff8880799ed2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x252/0x1280 [ 53.168598][ T3501] #3: ffffc900010b8378 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x5ee/0x1280 [ 53.168617][ T3501] #4: ffff88807424c158 (&port->lock){-.-.}-{2:2}, at: tty_insert_flip_string_and_push_buffer+0x3a/0x390 [ 53.168644][ T3501] #5: ffffffff8c7fba00 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0xa6/0x150 [ 53.168675][ T3501] [ 53.168675][ T3501] stack backtrace: [ 53.168679][ T3501] CPU: 1 PID: 3501 Comm: syz-executor310 Not tainted 5.15.143-syzkaller #0 [ 53.168694][ T3501] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 53.168701][ T3501] Call Trace: [ 53.168706][ T3501] [ 53.168711][ T3501] dump_stack_lvl+0x1e3/0x2cb [ 53.168727][ T3501] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 53.168739][ T3501] ? print_circular_bug+0x12b/0x1a0 [ 53.168748][ T3501] check_noncircular+0x2f8/0x3b0 [ 53.168757][ T3501] ? add_chain_block+0x850/0x850 [ 53.168766][ T3501] ? lockdep_lock+0x11f/0x2a0 [ 53.168779][ T3501] validate_chain+0x1649/0x5930 [ 53.168791][ T3501] ? reacquire_held_locks+0x660/0x660 [ 53.168801][ T3501] ? format_decode+0x72f/0x1f10 [ 53.168811][ T3501] ? vsnprintf+0x1c70/0x1c70 [ 53.168820][ T3501] ? memcpy+0x3c/0x60 [ 53.168832][ T3501] ? mark_lock+0x98/0x340 [ 53.168846][ T3501] __lock_acquire+0x1295/0x1ff0 [ 53.168864][ T3501] lock_acquire+0x1db/0x4f0 [ 53.168883][ T3501] ? console_lock_spinning_enable+0x2c/0x60 [ 53.168900][ T3501] ? read_lock_is_recursive+0x10/0x10 [ 53.168911][ T3501] ? console_lock_spinning_enable+0x2c/0x60 [ 53.168920][ T3501] ? __lock_acquire+0x1ff0/0x1ff0 [ 53.168927][ T3501] ? do_raw_spin_lock+0x14a/0x370 [ 53.168939][ T3501] console_lock_spinning_enable+0x51/0x60 [ 53.168948][ T3501] ? console_lock_spinning_enable+0x2c/0x60 [ 53.168956][ T3501] console_unlock+0xa47/0x12b0 [ 53.168966][ T3501] ? console_trylock_spinning+0x3f0/0x3f0 [ 53.168974][ T3501] ? __down_trylock_console_sem+0x1f2/0x250 [ 53.168983][ T3501] ? vprintk_emit+0xa6/0x150 [ 53.168991][ T3501] ? printk_parse_prefix+0x2c0/0x2c0 [ 53.168998][ T3501] ? vprintk_emit+0xa6/0x150 [ 53.169006][ T3501] ? console_trylock+0x70/0x70 [ 53.169013][ T3501] ? register_lock_class+0x100/0x9a0 [ 53.169026][ T3501] ? vprintk_emit+0x150/0x150 [ 53.169034][ T3501] ? mark_lock+0x98/0x340 [ 53.169043][ T3501] vprintk_emit+0xbf/0x150 [ 53.169052][ T3501] _printk+0xd1/0x111 [ 53.169060][ T3501] ? panic+0x84d/0x84d [ 53.169068][ T3501] ? __might_sleep+0xc0/0xc0 [ 53.169078][ T3501] ? read_lock_is_recursive+0x10/0x10 [ 53.169088][ T3501] should_fail+0x36c/0x4c0 [ 53.169097][ T3501] should_failslab+0x5/0x20 [ 53.169106][ T3501] slab_pre_alloc_hook+0x53/0xc0 [ 53.169115][ T3501] __kmalloc+0x6e/0x300 [ 53.169122][ T3501] ? __tty_buffer_request_room+0x1ef/0x500 [ 53.169133][ T3501] __tty_buffer_request_room+0x1ef/0x500 [ 53.169150][ T3501] tty_insert_flip_string_and_push_buffer+0x7c/0x390 [ 53.169161][ T3501] ? add_wait_queue+0xc1/0x170 [ 53.169172][ T3501] n_tty_write+0x63c/0x1280 [ 53.169180][ T3501] ? __might_fault+0xb4/0x110 [ 53.169190][ T3501] ? _copy_from_iter+0x3f0/0xe90 [ 53.169200][ T3501] ? n_tty_read+0x1db0/0x1db0 [ 53.169209][ T3501] ? wait_woken+0x1b0/0x1b0 [ 53.169218][ T3501] ? file_tty_write+0x363/0x920 [ 53.169226][ T3501] ? rcu_is_watching+0x11/0xa0 [ 53.169234][ T3501] ? __virt_addr_valid+0x22b/0x2e0 [ 53.169246][ T3501] ? __phys_addr_symbol+0x2b/0x70 [ 53.169255][ T3501] ? 0xffffffff81000000 [ 53.169261][ T3501] ? __check_object_size+0x300/0x410 [ 53.169272][ T3501] file_tty_write+0x561/0x920 [ 53.169281][ T3501] ? n_tty_read+0x1db0/0x1db0 [ 53.169289][ T3501] vfs_write+0xacf/0xe50 [ 53.169299][ T3501] ? file_end_write+0x250/0x250 [ 53.169308][ T3501] ? read_lock_is_recursive+0x10/0x10 [ 53.169319][ T3501] ? __fdget_pos+0x1e9/0x380 [ 53.169329][ T3501] ksys_write+0x1a2/0x2c0 [ 53.169337][ T3501] ? print_irqtrace_events+0x210/0x210 [ 53.169347][ T3501] ? __ia32_sys_read+0x80/0x80 [ 53.169356][ T3501] ? syscall_enter_from_user_mode+0x2e/0x230 [ 53.169364][ T3501] ? lockdep_hardirqs_on+0x94/0x130 [ 53.169372][ T3501] ? syscall_enter_from_user_mode+0x2e/0x230 [ 53.169383][ T3501] do_syscall_64+0x3d/0xb0 [ 53.169392][ T3501] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 53.169402][ T3501] RIP: 0033:0x7f0c4f843d39 [ 53.169409][ T3501] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 53.169417][ T3501] RSP: 002b:00007ffebbff0158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 53.169426][ T3501] RAX: ffffffffffffffda RBX: 00007ffebbff0170 RCX: 00007f0c4f843d39 [ 53.169433][ T3501] RDX: 000000000000ff2e RSI: 0000000020000100 RDI: 0000000000000003 [ 53.169439][ T3501] RBP: 0000000000000001 R08: 00007ffebbfefef7 R09: 00000000000000a0 [ 53.169445][ T3501] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001 [ 53.169450][ T3501] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 53.169458][ T3501] [ 54.140889][ T3501] CPU: 1 PID: 3501 Comm: syz-executor310 Not tainted 5.15.143-syzkaller #0 [ 54.149445][ T3501] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 54.159472][ T3501] Call Trace: [ 54.162726][ T3501] [ 54.165636][ T3501] dump_stack_lvl+0x1e3/0x2cb [ 54.170299][ T3501] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 54.175908][ T3501] ? panic+0x84d/0x84d [ 54.179949][ T3501] ? __might_sleep+0xc0/0xc0 [ 54.184514][ T3501] ? read_lock_is_recursive+0x10/0x10 [ 54.189863][ T3501] should_fail+0x38a/0x4c0 [ 54.194280][ T3501] should_failslab+0x5/0x20 [ 54.198759][ T3501] slab_pre_alloc_hook+0x53/0xc0 [ 54.203672][ T3501] __kmalloc+0x6e/0x300 [ 54.207799][ T3501] ? __tty_buffer_request_room+0x1ef/0x500 [ 54.213583][ T3501] __tty_buffer_request_room+0x1ef/0x500 [ 54.219194][ T3501] tty_insert_flip_string_and_push_buffer+0x7c/0x390 [ 54.225851][ T3501] ? add_wait_queue+0xc1/0x170 [ 54.230603][ T3501] n_tty_write+0x63c/0x1280 [ 54.235081][ T3501] ? __might_fault+0xb4/0x110 [ 54.239731][ T3501] ? _copy_from_iter+0x3f0/0xe90 [ 54.244643][ T3501] ? n_tty_read+0x1db0/0x1db0 [ 54.249296][ T3501] ? wait_woken+0x1b0/0x1b0 [ 54.253773][ T3501] ? file_tty_write+0x363/0x920 [ 54.258599][ T3501] ? rcu_is_watching+0x11/0xa0 [ 54.263335][ T3501] ? __virt_addr_valid+0x22b/0x2e0 [ 54.268419][ T3501] ? __phys_addr_symbol+0x2b/0x70 [ 54.273418][ T3501] ? 0xffffffff81000000 [ 54.277544][ T3501] ? __check_object_size+0x300/0x410 [ 54.282807][ T3501] file_tty_write+0x561/0x920 [ 54.287462][ T3501] ? n_tty_read+0x1db0/0x1db0 [ 54.292112][ T3501] vfs_write+0xacf/0xe50 [ 54.296328][ T3501] ? file_end_write+0x250/0x250 [ 54.301151][ T3501] ? read_lock_is_recursive+0x10/0x10 [ 54.306506][ T3501] ? __fdget_pos+0x1e9/0x380 [ 54.311073][ T3501] ksys_write+0x1a2/0x2c0 [ 54.315376][ T3501] ? print_irqtrace_events+0x210/0x210 [ 54.320809][ T3501] ? __ia32_sys_read+0x80/0x80 [ 54.325547][ T3501] ? syscall_enter_from_user_mode+0x2e/0x230 [ 54.331497][ T3501] ? lockdep_hardirqs_on+0x94/0x130 [ 54.336671][ T3501] ? syscall_enter_from_user_mode+0x2e/0x230 [ 54.342625][ T3501] do_syscall_64+0x3d/0xb0 [ 54.347014][ T3501] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 54.352901][ T3501] RIP: 0033:0x7f0c4f843d39 [ 54.357291][ T3501] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 54.376868][ T3501] RSP: 002b:00007ffebbff0158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 54.385256][ T3501] RAX: ffffffffffffffda RBX: 00007ffebbff0170 RCX: 00007f0c4f843d39 [ 54.393200][ T3501] RDX: 000000000000ff2e RSI: 0000000020000100 RDI: 0000000000000003 [ 54.401144][ T3501] RBP: 0000000000000001 R08: 00007ffebbfefef7 R09: 00000000000000a0 [ 54.409092][ T3501] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001 [ 54.417036][ T3501] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 54.424983][ T3501] executing program [ 58.167242][ T3502] FAULT_INJECTION: forcing a failure. [ 58.167242][ T3502] name failslab, interval 1, probability 0, space 0, times 0 [ 58.179827][ T3502] CPU: 1 PID: 3502 Comm: syz-executor310 Not tainted 5.15.143-syzkaller #0 [ 58.188388][ T3502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 58.198417][ T3502] Call Trace: [ 58.201673][ T3502] [ 58.204582][ T3502] dump_stack_lvl+0x1e3/0x2cb [ 58.209241][ T3502] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 58.214860][ T3502] ? panic+0x84d/0x84d [ 58.218906][ T3502] ? rcu_is_watching+0x11/0xa0 [ 58.223664][ T3502] ? lock_acquire+0xdd/0x4f0 [ 58.228227][ T3502] ? __might_sleep+0xc0/0xc0 [ 58.232808][ T3502] ? read_lock_is_recursive+0x10/0x10 [ 58.238168][ T3502] should_fail+0x38a/0x4c0 [ 58.242564][ T3502] should_failslab+0x5/0x20 [ 58.247046][ T3502] slab_pre_alloc_hook+0x53/0xc0 [ 58.251961][ T3502] __kmalloc+0x6e/0x300 [ 58.256091][ T3502] ? __tty_buffer_request_room+0x1ef/0x500 [ 58.261874][ T3502] __tty_buffer_request_room+0x1ef/0x500 [ 58.267484][ T3502] tty_insert_flip_string_and_push_buffer+0x7c/0x390 [ 58.274133][ T3502] ? add_wait_queue+0xc1/0x170 [ 58.278877][ T3502] n_tty_write+0x63c/0x1280 [ 58.283361][ T3502] ? __might_fault+0xb4/0x110 [ 58.288025][ T3502] ? _copy_from_iter+0x3f0/0xe90 [ 58.292936][ T3502] ? n_tty_read+0x1db0/0x1db0 [ 58.297587][ T3502] ? wait_woken+0x1b0/0x1b0 [ 58.302065][ T3502] ? file_tty_write+0x363/0x920 [ 58.306893][ T3502] ? rcu_is_watching+0x11/0xa0 [ 58.311638][ T3502] ? __virt_addr_valid+0x22b/0x2e0 [ 58.316745][ T3502] ? __phys_addr_symbol+0x2b/0x70 [ 58.321745][ T3502] ? 0xffffffff81000000 [ 58.325875][ T3502] ? __check_object_size+0x300/0x410 [ 58.331135][ T3502] file_tty_write+0x561/0x920 [ 58.335787][ T3502] ? n_tty_read+0x1db0/0x1db0 [ 58.340441][ T3502] vfs_write+0xacf/0xe50 [ 58.344661][ T3502] ? file_end_write+0x250/0x250 [ 58.349483][ T3502] ? rcu_is_watching+0x11/0xa0 [ 58.354223][ T3502] ? lock_release+0xb9/0x9a0 [ 58.358787][ T3502] ? read_lock_is_recursive+0x10/0x10 [ 58.364139][ T3502] ? rcu_is_watching+0x11/0xa0 [ 58.368883][ T3502] ? __fdget_pos+0x1e9/0x380 [ 58.373450][ T3502] ksys_write+0x1a2/0x2c0 [ 58.377755][ T3502] ? print_irqtrace_events+0x210/0x210 [ 58.383191][ T3502] ? __ia32_sys_read+0x80/0x80 [ 58.387931][ T3502] ? syscall_enter_from_user_mode+0x2e/0x230 [ 58.393892][ T3502] do_syscall_64+0x3d/0xb0 [ 58.398289][ T3502] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 58.404156][ T3502] RIP: 0033:0x7f0c4f843d39 [ 58.408546][ T3502] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 58.428125][ T3502] RSP: 002b:00007ffebbff0158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 58.436509][ T3502] RAX: ffffffffffffffda RBX: 00007ffebbff0170 RCX: 00007f0c4f843d39 [ 58.444455][ T3502] RDX: 000000000000ff2e RSI: 0000000020000100 RDI: 0000000000000003 [ 58.452399][ T3502] RBP: 0000000000000001 R08: 00007ffebbfefef7 R09: 00000000000000a0 [ 58.460346][ T3502] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffebbff016c [ 58.468302][ T3502] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 58.476252][ T3502] executing program [ 63.168724][ T3503] FAULT_INJECTION: forcing a failure. [ 63.168724][ T3503] name failslab, interval 1, probability 0, space 0, times 0 [ 63.181301][ T3503] CPU: 1 PID: 3503 Comm: syz-executor310 Not tainted 5.15.143-syzkaller #0 [ 63.189863][ T3503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 63.199890][ T3503] Call Trace: [ 63.203145][ T3503] [ 63.206051][ T3503] dump_stack_lvl+0x1e3/0x2cb [ 63.210706][ T3503] ? io_uring_drop_tctx_refs+0x19d/0x19d