Warning: Permanently added '10.128.10.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 428.978066][ T27] INFO: task kworker/u4:4:1154 blocked for more than 143 seconds. [ 428.986086][ T27] Not tainted 5.15.0-rc7-syzkaller #0 [ 428.993665][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.003240][ T27] task:kworker/u4:4 state:D stack:23240 pid: 1154 ppid: 2 flags:0x00004000 [ 429.013237][ T27] Workqueue: events_unbound io_ring_exit_work [ 429.020054][ T27] Call Trace: [ 429.023334][ T27] __schedule+0xb44/0x5960 [ 429.027852][ T27] ? find_held_lock+0x2d/0x110 [ 429.033860][ T27] ? __mutex_lock+0x960/0x12f0 [ 429.039263][ T27] ? io_schedule_timeout+0x140/0x140 [ 429.044563][ T27] schedule+0xd3/0x270 [ 429.049572][ T27] schedule_preempt_disabled+0xf/0x20 [ 429.054946][ T27] __mutex_lock+0xa34/0x12f0 [ 429.060551][ T27] ? io_uring_try_cancel_requests+0x7d1/0xc30 [ 429.066805][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 429.073256][ T27] ? stack_trace_save+0x8c/0xc0 [ 429.078729][ T27] ? stack_trace_consume_entry+0x160/0x160 [ 429.084551][ T27] io_uring_try_cancel_requests+0x7d1/0xc30 [ 429.091365][ T27] ? io_req_complete_post+0xa50/0xa50 [ 429.096757][ T27] io_ring_exit_work+0x137/0x19a0 [ 429.102749][ T27] ? io_uring_try_cancel_requests+0xc30/0xc30 [ 429.110077][ T27] ? lock_release+0x720/0x720 [ 429.114761][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 429.120691][ T27] process_one_work+0x9bf/0x16b0 [ 429.125642][ T27] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 429.131988][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 429.137021][ T27] ? _raw_spin_lock_irq+0x41/0x50 [ 429.143095][ T27] worker_thread+0x658/0x11f0 [ 429.147894][ T27] ? process_one_work+0x16b0/0x16b0 [ 429.153990][ T27] kthread+0x3e5/0x4d0 [ 429.158700][ T27] ? set_kthread_struct+0x130/0x130 [ 429.163906][ T27] ret_from_fork+0x1f/0x30 [ 429.169356][ T27] [ 429.169356][ T27] Showing all locks held in the system: [ 429.177067][ T27] 1 lock held by khungtaskd/27: [ 429.182848][ T27] #0: ffffffff8b981b20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 429.194083][ T27] 3 locks held by kworker/u4:4/1154: [ 429.200277][ T27] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 [ 429.211919][ T27] #1: ffffc90004dffdb0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 [ 429.224459][ T27] #2: ffff888079b800a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_try_cancel_requests+0x7d1/0xc30 [ 429.235998][ T27] 1 lock held by in:imklog/6239: [ 429.241503][ T27] #0: ffff88801d1320f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 429.251559][ T27] 1 lock held by syz-executor741/6562: [ 429.257040][ T27] [ 429.260546][ T27] ============================================= [ 429.260546][ T27] [ 429.269633][ T27] NMI backtrace for cpu 0 [ 429.273951][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc7-syzkaller #0 [ 429.282188][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.292234][ T27] Call Trace: [ 429.295507][ T27] dump_stack_lvl+0xcd/0x134 [ 429.300097][ T27] nmi_cpu_backtrace.cold+0x47/0x144 [ 429.305554][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 429.310752][ T27] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 429.317202][ T27] watchdog+0xc1d/0xf50 [ 429.321370][ T27] ? reset_hung_task_detector+0x30/0x30 [ 429.326916][ T27] kthread+0x3e5/0x4d0 [ 429.330986][ T27] ? set_kthread_struct+0x130/0x130 [ 429.336188][ T27] ret_from_fork+0x1f/0x30 [ 429.340761][ T27] Sending NMI from CPU 0 to CPUs 1: [ 429.346052][ C1] NMI backtrace for cpu 1 [ 429.346061][ C1] CPU: 1 PID: 6562 Comm: syz-executor741 Not tainted 5.15.0-rc7-syzkaller #0 [ 429.346078][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.346086][ C1] RIP: 0010:__orc_find+0x8f/0xf0 [ 429.346104][ C1] Code: d8 48 c1 e8 03 42 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01 d8 48 39 c1 73 b0 4c 8d 63 fc <49> 39 ec 73 b3 4d 29 ee 49 c1 fe 02 4b 8d 04 76 48 8d 04 46 48 83 [ 429.346118][ C1] RSP: 0018:ffffc90002cdf6c8 EFLAGS: 00000283 [ 429.346130][ C1] RAX: ffffffff814cffd7 RBX: ffffffff8d7c3a78 RCX: ffffffff814cff4c [ 429.346140][ C1] RDX: 0000000000000000 RSI: ffffffff8dea44c2 RDI: ffffffff8d7c3a68 [ 429.346149][ C1] RBP: ffffffff8d7c3a68 R08: 0000000000000000 R09: ffffffff8dea44c2 [ 429.346158][ C1] R10: fffff5200059bf08 R11: 0000000000086089 R12: ffffffff8d7c3a74 [ 429.346167][ C1] R13: ffffffff8d7c3a68 R14: ffffffff8d7c3a68 R15: dffffc0000000000 [ 429.346179][ C1] FS: 00007fbd0833d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 429.346193][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 429.346203][ C1] CR2: 00007fbd083e0ff8 CR3: 00000000720b7000 CR4: 0000000000350ee0 [ 429.346212][ C1] Call Trace: [ 429.346216][ C1] ? arch_stack_walk+0x5c/0xe0 [ 429.346232][ C1] ? task_work_run+0xdc/0x1a0 [ 429.346245][ C1] unwind_next_frame+0x32a/0x1ce0 [ 429.346259][ C1] ? task_work_run+0xdd/0x1a0 [ 429.346274][ C1] ? deref_stack_reg+0x150/0x150 [ 429.346287][ C1] ? __unwind_start+0x51b/0x800 [ 429.346299][ C1] ? create_prof_cpu_mask+0x20/0x20 [ 429.346316][ C1] arch_stack_walk+0x7d/0xe0 [ 429.346331][ C1] ? task_work_run+0xdd/0x1a0 [ 429.346346][ C1] stack_trace_save+0x8c/0xc0 [ 429.346361][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 429.346380][ C1] kasan_save_stack+0x1b/0x40 [ 429.346393][ C1] ? kasan_save_stack+0x1b/0x40 [ 429.346406][ C1] ? __kasan_kmalloc+0xa4/0xd0 [ 429.346418][ C1] ? io_issue_sqe+0x3289/0x7180 [ 429.346433][ C1] ? __io_queue_sqe+0x90/0xb30 [ 429.346447][ C1] ? io_req_task_submit+0xbf/0x1b0 [ 429.346462][ C1] ? tctx_task_work+0x189/0x6c0 [ 429.346481][ C1] ? task_work_run+0xdd/0x1a0 [ 429.346494][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 429.346511][ C1] ? syscall_exit_to_user_mode+0x19/0x60 [ 429.346528][ C1] ? do_syscall_64+0x42/0xb0 [ 429.346540][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 429.346561][ C1] ? find_held_lock+0x2d/0x110 [ 429.346576][ C1] ? kmem_cache_alloc_trace+0x42/0x3c0 [ 429.346598][ C1] ? rcu_read_lock_sched_held+0x3a/0x70 [ 429.346613][ C1] __kasan_kmalloc+0xa4/0xd0 [ 429.346626][ C1] io_issue_sqe+0x3289/0x7180 [ 429.346645][ C1] ? io_connect+0x6a0/0x6a0 [ 429.346659][ C1] ? mark_lock+0xef/0x17b0 [ 429.346673][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 429.346690][ C1] ? lock_chain_count+0x20/0x20 [ 429.346707][ C1] __io_queue_sqe+0x90/0xb30 [ 429.346722][ C1] ? io_timeout_prep+0x8b0/0x8b0 [ 429.346738][ C1] ? mark_held_locks+0x9f/0xe0 [ 429.346752][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 429.346769][ C1] io_req_task_submit+0xbf/0x1b0 [ 429.346784][ C1] tctx_task_work+0x189/0x6c0 [ 429.346800][ C1] ? io_fallback_req_func+0x3e0/0x3e0 [ 429.346818][ C1] task_work_run+0xdd/0x1a0 [ 429.346833][ C1] exit_to_user_mode_prepare+0x256/0x290 [ 429.346848][ C1] syscall_exit_to_user_mode+0x19/0x60 [ 429.346864][ C1] do_syscall_64+0x42/0xb0 [ 429.346876][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 429.346893][ C1] RIP: 0033:0x7fbd0838bd79 [ 429.346906][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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 [ 429.346919][ C1] RSP: 002b:00007fbd0833d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 429.346932][ C1] RAX: 0000000000000800 RBX: 00007fbd08415408 RCX: 00007fbd0838bd79 [ 429.346941][ C1] RDX: 0000000000000000 RSI: 0000000000006019 RDI: 0000000000000003 [ 429.346949][ C1] RBP: 00007fbd08415400 R08: 0000000000000000 R09: 0000000000000000 [ 429.346958][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000001000 [ 429.346966][ C1] R13: 0000000000000003 R14: 00007fbd0833d400 R15: 0000000000022000 [ 429.759485][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 429.766322][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc7-syzkaller #0 [ 429.774472][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.784509][ T27] Call Trace: [ 429.787772][ T27] dump_stack_lvl+0xcd/0x134 [ 429.792353][ T27] panic+0x2b0/0x6dd [ 429.796235][ T27] ? __warn_printk+0xf3/0xf3 [ 429.800898][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 429.806087][ T27] ? preempt_schedule_thunk+0x16/0x18 [ 429.811447][ T27] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 429.817594][ T27] ? watchdog.cold+0x130/0x158 [ 429.822350][ T27] watchdog.cold+0x141/0x158 [ 429.827019][ T27] ? reset_hung_task_detector+0x30/0x30 [ 429.832639][ T27] kthread+0x3e5/0x4d0 [ 429.836694][ T27] ? set_kthread_struct+0x130/0x130 [ 429.841883][ T27] ret_from_fork+0x1f/0x30 [ 429.847230][ T27] Kernel Offset: disabled [ 429.851734][ T27] Rebooting in 86400 seconds..