Warning: Permanently added '10.128.1.17' (ECDSA) to the list of known hosts. executing program [ 616.300949][ T1172] INFO: task syz-executor540:6862 blocked for more than 143 seconds. [ 616.309166][ T1172] Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 616.316692][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.325462][ T1172] task:syz-executor540 state:D stack:28104 pid: 6862 ppid: 6856 flags:0x00004000 [ 616.334786][ T1172] Call Trace: [ 616.338280][ T1172] __schedule+0xea9/0x2230 [ 616.342782][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.348129][ T1172] schedule+0xd0/0x2a0 [ 616.352256][ T1172] schedule_timeout+0x1d8/0x250 [ 616.357114][ T1172] ? usleep_range+0x170/0x170 [ 616.361938][ T1172] ? lock_downgrade+0x830/0x830 [ 616.366844][ T1172] ? do_raw_spin_lock+0x120/0x2b0 [ 616.372877][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.378114][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.385814][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.391503][ T1172] wait_for_completion+0x163/0x260 [ 616.396612][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.403325][ T1172] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.409820][ T1172] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 616.416428][ T1172] ? __kthread_bind_mask+0xa1/0xc0 [ 616.422063][ T1172] io_uring_setup+0x1495/0x29a0 [ 616.426910][ T1172] ? io_connect+0x510/0x510 [ 616.432141][ T1172] ? io_sq_thread+0xe00/0xe00 [ 616.436811][ T1172] ? io_wake_function+0x2e0/0x2e0 [ 616.442504][ T1172] ? check_preemption_disabled+0x50/0x130 [ 616.448214][ T1172] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.454870][ T1172] ? lockdep_hardirqs_on+0x53/0x100 [ 616.460151][ T1172] do_syscall_64+0x2d/0x70 [ 616.465455][ T1172] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.471839][ T1172] RIP: 0033:0x440299 [ 616.475718][ T1172] Code: Bad RIP value. [ 616.479760][ T1172] RSP: 002b:00007ffd2eb477d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.489092][ T1172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 616.497499][ T1172] RDX: 0000000000400b40 RSI: 0000000020000000 RDI: 00000000000006ff [ 616.505928][ T1172] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.514318][ T1172] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 616.522857][ T1172] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 616.531324][ T1172] INFO: task io_uring-sq:6863 blocked for more than 143 seconds. [ 616.539033][ T1172] Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 616.546779][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.555880][ T1172] task:io_uring-sq state:D stack:31200 pid: 6863 ppid: 2 flags:0x00004000 [ 616.565564][ T1172] Call Trace: [ 616.568863][ T1172] __schedule+0xea9/0x2230 [ 616.574049][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.579344][ T1172] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.585851][ T1172] schedule+0xd0/0x2a0 [ 616.589917][ T1172] ? __do_sys_io_uring_enter+0x1b00/0x1b00 [ 616.596411][ T1172] schedule_preempt_disabled+0xf/0x20 [ 616.602220][ T1172] kthread+0x2ac/0x4a0 [ 616.606295][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.612148][ T1172] ret_from_fork+0x1f/0x30 [ 616.616594][ T1172] [ 616.616594][ T1172] Showing all locks held in the system: [ 616.625184][ T1172] 1 lock held by khungtaskd/1172: [ 616.630205][ T1172] #0: ffffffff89c67980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.641178][ T1172] 1 lock held by in:imklog/6559: [ 616.646118][ T1172] #0: ffff88809439e170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.655379][ T1172] [ 616.657701][ T1172] ============================================= [ 616.657701][ T1172] [ 616.666139][ T1172] NMI backtrace for cpu 0 [ 616.670485][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 616.679911][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.689959][ T1172] Call Trace: [ 616.693337][ T1172] dump_stack+0x198/0x1fd [ 616.697681][ T1172] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.702925][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.708552][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.714564][ T1172] watchdog+0xd89/0xf30 [ 616.718699][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.724398][ T1172] kthread+0x3b5/0x4a0 [ 616.728445][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.733558][ T1172] ret_from_fork+0x1f/0x30 [ 616.738077][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 616.744050][ C1] NMI backtrace for cpu 1 [ 616.744056][ C1] CPU: 1 PID: 6560 Comm: rs:main Q:Reg Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 616.744062][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.744067][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x2a/0x60 [ 616.744077][ C1] Code: 65 48 8b 14 25 c0 fe 01 00 65 8b 05 e0 2e 8d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 4c 14 00 00 85 c0 74 2b <8b> 82 28 14 00 00 83 f8 02 75 20 48 8b 8a 30 14 00 00 8b 92 2c 14 [ 616.744081][ C1] RSP: 0018:ffffc9000a4c7990 EFLAGS: 00000246 [ 616.744089][ C1] RAX: 0000000080000000 RBX: ffff88808ab1c4b8 RCX: ffffffff820721e8 [ 616.744094][ C1] RDX: ffff8880a879a3c0 RSI: ffffffff820719eb RDI: 0000000000000001 [ 616.744099][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8abcba4f [ 616.744104][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000a4c7b30 [ 616.744108][ C1] R13: ffff88808ab1c2d0 R14: 0000000000000000 R15: ffff88808ab1c6e0 [ 616.744114][ C1] FS: 00007f9eabfff700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.744118][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.744123][ C1] CR2: 00007f6dca811000 CR3: 00000000a0588000 CR4: 00000000001506e0 [ 616.744128][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.744133][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.744136][ C1] Call Trace: [ 616.744140][ C1] ext4_da_write_begin+0x2cb/0x11d0 [ 616.744144][ C1] ? read_seqcount_t_begin.constprop.0+0x133/0x1e0 [ 616.744154][ C1] ? iov_iter_fault_in_readable+0x1fc/0x3f0 [ 616.744157][ C1] ? ext4_write_begin+0x1510/0x1510 [ 616.744161][ C1] ? compat_import_iovec+0x3d0/0x3d0 [ 616.744165][ C1] ? current_time+0x1ca/0x2c0 [ 616.744168][ C1] generic_perform_write+0x20a/0x4f0 [ 616.744172][ C1] ? generic_file_readonly_mmap+0x1b0/0x1b0 [ 616.744176][ C1] ? down_write_killable+0x170/0x170 [ 616.744180][ C1] ext4_buffered_write_iter+0x235/0x4a0 [ 616.744184][ C1] ext4_file_write_iter+0x1f0/0x13f0 [ 616.744187][ C1] ? aa_file_perm+0x5e2/0x1100 [ 616.744191][ C1] ? ext4_buffered_write_iter+0x4a0/0x4a0 [ 616.744195][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.744198][ C1] ? aa_path_link+0x2f0/0x2f0 [ 616.744202][ C1] new_sync_write+0x422/0x650 [ 616.744205][ C1] ? new_sync_read+0x6e0/0x6e0 [ 616.744209][ C1] ? lock_downgrade+0x830/0x830 [ 616.744212][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.744216][ C1] ? __sb_start_write+0x1d5/0x470 [ 616.744219][ C1] vfs_write+0x5ad/0x730 [ 616.744222][ C1] ksys_write+0x12d/0x250 [ 616.744226][ C1] ? __ia32_sys_read+0xb0/0xb0 [ 616.744230][ C1] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.744233][ C1] ? lockdep_hardirqs_on+0x53/0x100 [ 616.744237][ C1] do_syscall_64+0x2d/0x70 [ 616.744240][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.744244][ C1] RIP: 0033:0x7f9eb2d471cd [ 616.744254][ C1] Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 616.744258][ C1] RSP: 002b:00007f9eabffe590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 616.744267][ C1] RAX: ffffffffffffffda RBX: 00007f9ea0022fc0 RCX: 00007f9eb2d471cd [ 616.744271][ C1] RDX: 0000000000000045 RSI: 00007f9ea0022fc0 RDI: 0000000000000006 [ 616.744276][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 616.744281][ C1] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f9ea0022d40 [ 616.744286][ C1] R13: 00007f9eabffe5b0 R14: 000056291d1aa360 R15: 0000000000000045 [ 616.744358][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 617.100889][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 617.110329][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.120369][ T1172] Call Trace: [ 617.123688][ T1172] dump_stack+0x198/0x1fd [ 617.128079][ T1172] panic+0x347/0x7c0 [ 617.131974][ T1172] ? __warn_printk+0xf3/0xf3 [ 617.136563][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.142177][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 617.147529][ T1172] ? watchdog.cold+0x22d/0x24b [ 617.152273][ T1172] ? watchdog+0xc59/0xf30 [ 617.156594][ T1172] watchdog.cold+0x23e/0x24b [ 617.161166][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.166878][ T1172] kthread+0x3b5/0x4a0 [ 617.170929][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 617.176022][ T1172] ret_from_fork+0x1f/0x30 [ 617.181918][ T1172] Kernel Offset: disabled [ 617.186265][ T1172] Rebooting in 86400 seconds..