Warning: Permanently added '10.128.0.132' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 721.242818][ T1666] INFO: task syz-executor879:8391 blocked for more than 143 seconds. [ 721.251047][ T1666] Not tainted 5.11.0-next-20210226-syzkaller #0 [ 721.260011][ T1666] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.268760][ T1666] task:syz-executor879 state:D stack:27536 pid: 8391 ppid: 8390 flags:0x00000004 [ 721.278082][ T1666] Call Trace: [ 721.281432][ T1666] __schedule+0x90c/0x21a0 [ 721.286036][ T1666] ? io_schedule_timeout+0x140/0x140 [ 721.291350][ T1666] ? lock_chain_count+0x20/0x20 [ 721.296363][ T1666] schedule+0xcf/0x270 [ 721.300539][ T1666] schedule_timeout+0x1db/0x250 [ 721.305481][ T1666] ? usleep_range+0x170/0x170 [ 721.310178][ T1666] ? wait_for_completion+0x160/0x270 [ 721.315580][ T1666] ? mark_held_locks+0x9f/0xe0 [ 721.320362][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.325376][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.330603][ T1666] wait_for_completion+0x168/0x270 [ 721.335803][ T1666] ? bit_wait_io_timeout+0x160/0x160 [ 721.341124][ T1666] ? do_raw_spin_lock+0x120/0x2b0 [ 721.346210][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.351169][ T1666] io_sq_thread_park+0xd5/0x130 [ 721.356173][ T1666] io_uring_cancel_task_requests+0x24c/0xd90 [ 721.362185][ T1666] ? io_openat2+0x8f0/0x8f0 [ 721.366810][ T1666] ? xa_find+0x1fb/0x320 [ 721.371160][ T1666] ? xas_find+0x7e0/0x7e0 [ 721.375634][ T1666] ? lock_release+0x3bb/0x710 [ 721.380338][ T1666] __io_uring_files_cancel+0x110/0x230 [ 721.386994][ T1666] ? __io_uring_free+0xc0/0xc0 [ 721.391792][ T1666] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.400093][ T1666] ? __validate_process_creds+0x20c/0x370 [ 721.406129][ T1666] do_exit+0x299/0x2a60 [ 721.410472][ T1666] ? find_held_lock+0x2d/0x110 [ 721.415325][ T1666] ? lock_release+0x3bb/0x710 [ 721.420043][ T1666] ? mm_update_next_owner+0x7a0/0x7a0 [ 721.425504][ T1666] ? lock_downgrade+0x6d0/0x6d0 [ 721.430396][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.435706][ T1666] do_group_exit+0x125/0x310 [ 721.440334][ T1666] __x64_sys_exit_group+0x3a/0x50 [ 721.445421][ T1666] do_syscall_64+0x2d/0x70 [ 721.449930][ T1666] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 721.455918][ T1666] RIP: 0033:0x43e899 [ 721.459823][ T1666] RSP: 002b:00007ffd209de9a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 721.468314][ T1666] RAX: ffffffffffffffda RBX: 00000000004af2f0 RCX: 000000000043e899 [ 721.476423][ T1666] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 721.484596][ T1666] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 [ 721.492689][ T1666] R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004af2f0 [ 721.500692][ T1666] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 721.508844][ T1666] INFO: task iou-sqp-8391:8392 can't die for more than 143 seconds. [ 721.517551][ T1666] task:iou-sqp-8391 state:D stack:29656 pid: 8392 ppid: 8390 flags:0x00004004 [ 721.526933][ T1666] Call Trace: [ 721.530250][ T1666] __schedule+0x90c/0x21a0 [ 721.534796][ T1666] ? io_schedule_timeout+0x140/0x140 [ 721.540109][ T1666] schedule+0xcf/0x270 [ 721.544305][ T1666] schedule_timeout+0x1db/0x250 [ 721.549180][ T1666] ? usleep_range+0x170/0x170 [ 721.553946][ T1666] ? wait_for_completion+0x160/0x270 [ 721.559266][ T1666] ? lock_downgrade+0x6d0/0x6d0 [ 721.564193][ T1666] ? do_raw_spin_lock+0x120/0x2b0 [ 721.569262][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.574318][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.579555][ T1666] wait_for_completion+0x168/0x270 [ 721.584749][ T1666] ? preempt_schedule_thunk+0x16/0x18 [ 721.590178][ T1666] ? bit_wait_io_timeout+0x160/0x160 [ 721.595563][ T1666] ? preempt_schedule_common+0x59/0xc0 [ 721.601058][ T1666] ? preempt_schedule_thunk+0x16/0x18 [ 721.606531][ T1666] ? trace_hardirqs_on+0x38/0x1c0 [ 721.611682][ T1666] io_sq_thread+0x27d/0x1ae0 [ 721.616422][ T1666] ? lock_is_held_type+0xd5/0x130 [ 721.621494][ T1666] ? find_held_lock+0x2d/0x110 [ 721.626321][ T1666] ? io_submit_sqes+0x63d0/0x63d0 [ 721.631369][ T1666] ? lock_release+0x3bb/0x710 [ 721.637093][ T1666] ? ret_from_fork+0x8/0x30 [ 721.641634][ T1666] ? finish_wait+0x260/0x260 [ 721.647417][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.652419][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.658242][ T1666] ? io_submit_sqes+0x63d0/0x63d0 [ 721.663377][ T1666] ret_from_fork+0x1f/0x30 [ 721.667834][ T1666] INFO: task iou-sqp-8391:8392 blocked for more than 143 seconds. [ 721.675730][ T1666] Not tainted 5.11.0-next-20210226-syzkaller #0 [ 721.682503][ T1666] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.691259][ T1666] task:iou-sqp-8391 state:D stack:29656 pid: 8392 ppid: 8390 flags:0x00004004 [ 721.700576][ T1666] Call Trace: [ 721.703944][ T1666] __schedule+0x90c/0x21a0 [ 721.708410][ T1666] ? io_schedule_timeout+0x140/0x140 [ 721.713782][ T1666] schedule+0xcf/0x270 [ 721.717869][ T1666] schedule_timeout+0x1db/0x250 [ 721.722849][ T1666] ? usleep_range+0x170/0x170 [ 721.727548][ T1666] ? wait_for_completion+0x160/0x270 [ 721.732918][ T1666] ? lock_downgrade+0x6d0/0x6d0 [ 721.737831][ T1666] ? do_raw_spin_lock+0x120/0x2b0 [ 721.742971][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.747930][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.753224][ T1666] wait_for_completion+0x168/0x270 [ 721.758357][ T1666] ? preempt_schedule_thunk+0x16/0x18 [ 721.763793][ T1666] ? bit_wait_io_timeout+0x160/0x160 [ 721.769137][ T1666] ? preempt_schedule_common+0x59/0xc0 [ 721.775817][ T1666] ? preempt_schedule_thunk+0x16/0x18 [ 721.781248][ T1666] ? trace_hardirqs_on+0x38/0x1c0 [ 721.787085][ T1666] io_sq_thread+0x27d/0x1ae0 [ 721.791749][ T1666] ? lock_is_held_type+0xd5/0x130 [ 721.796906][ T1666] ? find_held_lock+0x2d/0x110 [ 721.801688][ T1666] ? io_submit_sqes+0x63d0/0x63d0 [ 721.806787][ T1666] ? lock_release+0x3bb/0x710 [ 721.811489][ T1666] ? ret_from_fork+0x8/0x30 [ 721.816073][ T1666] ? finish_wait+0x260/0x260 [ 721.820694][ T1666] ? rwlock_bug.part.0+0x90/0x90 [ 721.825706][ T1666] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.830937][ T1666] ? io_submit_sqes+0x63d0/0x63d0 [ 721.836121][ T1666] ret_from_fork+0x1f/0x30 [ 721.840686][ T1666] [ 721.840686][ T1666] Showing all locks held in the system: [ 721.848474][ T1666] 1 lock held by khungtaskd/1666: [ 721.853597][ T1666] #0: ffffffff8bf741e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.863570][ T1666] 2 locks held by in:imklog/8110: [ 721.868596][ T1666] #0: ffff888018a905f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.877979][ T1666] #1: ffffffff8bf631f8 (logbuf_lock){....}-{2:2}, at: is_bpf_text_address+0x0/0x160 [ 721.887683][ T1666] 1 lock held by syz-executor879/8391: [ 721.893223][ T1666] #0: ffff888016c52870 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park+0x5d/0x130 [ 721.903606][ T1666] [ 721.905953][ T1666] ============================================= [ 721.905953][ T1666] [ 721.914986][ T1666] NMI backtrace for cpu 0 [ 721.919349][ T1666] CPU: 0 PID: 1666 Comm: khungtaskd Not tainted 5.11.0-next-20210226-syzkaller #0 [ 721.928537][ T1666] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.938587][ T1666] Call Trace: [ 721.941862][ T1666] dump_stack+0xfa/0x151 [ 721.946171][ T1666] nmi_cpu_backtrace.cold+0x44/0xd7 [ 721.951370][ T1666] ? lapic_can_unplug_cpu+0x80/0x80 [ 721.956599][ T1666] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 721.962607][ T1666] watchdog+0xd8e/0xf40 [ 721.966759][ T1666] ? trace_sched_process_hang+0x280/0x280 [ 721.972502][ T1666] kthread+0x3b1/0x4a0 [ 721.976587][ T1666] ? __kthread_bind_mask+0xc0/0xc0 [ 721.981687][ T1666] ret_from_fork+0x1f/0x30 [ 721.986290][ T1666] Sending NMI from CPU 0 to CPUs 1: [ 721.991962][ C1] NMI backtrace for cpu 1 [ 721.991973][ C1] CPU: 1 PID: 4845 Comm: systemd-journal Not tainted 5.11.0-next-20210226-syzkaller #0 [ 721.991983][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.991993][ C1] RIP: 0010:security_prepare_creds+0x115/0x190 [ 721.992005][ C1] Code: c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 33 d6 e9 fd 44 89 f6 48 63 fb 81 ce 00 01 00 00 e8 42 58 2d fe 49 8d bd 88 00 00 00 <48> ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 75 [ 721.992020][ C1] RSP: 0018:ffffc9000145fe20 EFLAGS: 00000286 [ 721.992034][ C1] RAX: ffff888015755b18 RBX: 0000000000000008 RCX: ffffffff89200068 [ 721.992043][ C1] RDX: 000000000000079d RSI: 0000000000000000 RDI: ffff88801f514488 [ 721.992052][ C1] RBP: ffff888011d4ed00 R08: 000000008121b824 R09: 0000000000000000 [ 721.992061][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801f514400 [ 721.992070][ C1] R13: ffff88801f514400 R14: 0000000000400cc0 R15: ffff888011d4ed00 [ 721.992079][ C1] FS: 00007f679eb9b8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 721.992088][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 721.992096][ C1] CR2: 00007f679bf71000 CR3: 0000000025699000 CR4: 00000000001506e0 [ 721.992105][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 721.992114][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 721.992122][ C1] Call Trace: [ 721.992127][ C1] prepare_creds+0x509/0x730 [ 721.992132][ C1] do_faccessat+0x3f4/0x850 [ 721.992138][ C1] ? stream_open+0x60/0x60 [ 721.992144][ C1] ? __secure_computing+0x104/0x360 [ 721.992150][ C1] do_syscall_64+0x2d/0x70 [ 721.992156][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 721.992163][ C1] RIP: 0033:0x7f679de569c7 [ 721.992173][ C1] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 721.992188][ C1] RSP: 002b:00007fffda741178 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 721.992203][ C1] RAX: ffffffffffffffda RBX: 00007fffda7441a0 RCX: 00007f679de569c7 [ 721.992212][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000558b801a99a3 [ 721.992221][ C1] RBP: 00007fffda7412c0 R08: 0000558b8019f3e5 R09: 0000000000000018 [ 721.992230][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 721.992239][ C1] R13: 0000000000000000 R14: 0000558b817108a0 R15: 00007fffda7417b0 [ 721.992679][ T1666] Kernel panic - not syncing: hung_task: blocked tasks [ 722.238311][ T1666] CPU: 0 PID: 1666 Comm: khungtaskd Not tainted 5.11.0-next-20210226-syzkaller #0 [ 722.247539][ T1666] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.257598][ T1666] Call Trace: [ 722.260888][ T1666] dump_stack+0xfa/0x151 [ 722.265148][ T1666] panic+0x306/0x73d [ 722.269067][ T1666] ? __warn_printk+0xf3/0xf3 [ 722.273663][ T1666] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.278851][ T1666] ? preempt_schedule_thunk+0x16/0x18 [ 722.284213][ T1666] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 722.290371][ T1666] ? watchdog.cold+0x22d/0x248 [ 722.295148][ T1666] watchdog.cold+0x23e/0x248 [ 722.299730][ T1666] ? trace_sched_process_hang+0x280/0x280 [ 722.305467][ T1666] kthread+0x3b1/0x4a0 [ 722.309546][ T1666] ? __kthread_bind_mask+0xc0/0xc0 [ 722.314669][ T1666] ret_from_fork+0x1f/0x30 [ 722.320160][ T1666] Kernel Offset: disabled [ 722.324507][ T1666] Rebooting in 86400 seconds..