Warning: Permanently added '10.128.0.158' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.308577][ T1167] INFO: task syz-executor957:6851 blocked for more than 143 seconds. [ 616.316766][ T1167] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.324155][ T1167] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.332908][ T1167] task:syz-executor957 state:D stack:28104 pid: 6851 ppid: 6845 flags:0x00004000 [ 616.342942][ T1167] Call Trace: [ 616.346336][ T1167] __schedule+0xea9/0x2230 [ 616.351827][ T1167] ? io_schedule_timeout+0x140/0x140 [ 616.357102][ T1167] schedule+0xd0/0x2a0 [ 616.361931][ T1167] schedule_timeout+0x1d8/0x250 [ 616.366772][ T1167] ? usleep_range+0x170/0x170 [ 616.372467][ T1167] ? lock_downgrade+0x830/0x830 [ 616.377307][ T1167] ? do_raw_spin_lock+0x120/0x2b0 [ 616.383282][ T1167] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.389005][ T1167] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.394972][ T1167] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.400873][ T1167] wait_for_completion+0x163/0x260 [ 616.405975][ T1167] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.412689][ T1167] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.419652][ T1167] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 616.425484][ T1167] ? __kthread_bind_mask+0xa1/0xc0 [ 616.431404][ T1167] io_uring_setup+0x1495/0x29a0 [ 616.436250][ T1167] ? io_sq_thread+0xe00/0xe00 [ 616.442222][ T1167] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.447060][ T1167] ? io_wake_function+0x2e0/0x2e0 [ 616.452803][ T1167] ? check_preemption_disabled+0x50/0x130 [ 616.458961][ T1167] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.464929][ T1167] ? lockdep_hardirqs_on+0x53/0x100 [ 616.470891][ T1167] do_syscall_64+0x2d/0x70 [ 616.475297][ T1167] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.481865][ T1167] RIP: 0033:0x440299 [ 616.485784][ T1167] Code: Bad RIP value. [ 616.490597][ T1167] RSP: 002b:00007ffce349bed8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.499479][ T1167] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 616.507440][ T1167] RDX: 0000000000400b40 RSI: 0000000020001380 RDI: 0000000000002432 [ 616.516152][ T1167] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.524571][ T1167] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 616.533064][ T1167] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 616.541574][ T1167] INFO: task io_uring-sq:6852 blocked for more than 143 seconds. [ 616.549970][ T1167] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.556981][ T1167] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.566475][ T1167] task:io_uring-sq state:D stack:31200 pid: 6852 ppid: 2 flags:0x00004000 [ 616.576267][ T1167] Call Trace: [ 616.580142][ T1167] __schedule+0xea9/0x2230 [ 616.584564][ T1167] ? io_schedule_timeout+0x140/0x140 [ 616.590526][ T1167] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.596338][ T1167] schedule+0xd0/0x2a0 [ 616.601147][ T1167] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.606968][ T1167] schedule_preempt_disabled+0xf/0x20 [ 616.613044][ T1167] kthread+0x2ac/0x4a0 [ 616.617123][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 616.622998][ T1167] ret_from_fork+0x1f/0x30 [ 616.627421][ T1167] [ 616.627421][ T1167] Showing all locks held in the system: [ 616.636243][ T1167] 1 lock held by khungtaskd/1167: [ 616.641968][ T1167] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.652402][ T1167] 1 lock held by in:imklog/6539: [ 616.657355][ T1167] #0: ffff8880a71128b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.667215][ T1167] [ 616.670793][ T1167] ============================================= [ 616.670793][ T1167] [ 616.679654][ T1167] NMI backtrace for cpu 0 [ 616.683970][ T1167] CPU: 0 PID: 1167 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.693442][ T1167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.703472][ T1167] Call Trace: [ 616.706799][ T1167] dump_stack+0x198/0x1fd [ 616.711153][ T1167] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.716393][ T1167] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.722003][ T1167] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.727996][ T1167] watchdog+0xd89/0xf30 [ 616.732133][ T1167] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.737845][ T1167] kthread+0x3b5/0x4a0 [ 616.741902][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 616.746993][ T1167] ret_from_fork+0x1f/0x30 [ 616.751514][ T1167] Sending NMI from CPU 0 to CPUs 1: [ 616.756976][ C1] NMI backtrace for cpu 1 [ 616.756983][ C1] CPU: 1 PID: 3912 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.756990][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.756995][ C1] RIP: 0010:write_comp_data+0x2f/0x80 [ 616.757007][ C1] Code: 05 36 20 8d 7e 65 48 8b 34 25 c0 fe 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 86 4c 14 00 00 85 c0 74 4f 8b 86 28 14 00 00 <83> f8 03 75 44 48 8b 86 30 14 00 00 8b b6 2c 14 00 00 4c 8b 00 48 [ 616.757011][ C1] RSP: 0018:ffffc90005357ed0 EFLAGS: 00000246 [ 616.757020][ C1] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8175981a [ 616.757026][ C1] RDX: 0000000000000002 RSI: ffff8880a9270380 RDI: 0000000000000005 [ 616.757032][ C1] RBP: ffffffff884fba40 R08: 0000000000000001 R09: 0000000000000001 [ 616.757037][ C1] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002 [ 616.757043][ C1] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 [ 616.757049][ C1] FS: 00007f032a1928c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.757054][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.757060][ C1] CR2: 00007f0327536000 CR3: 00000000a9326000 CR4: 00000000001506e0 [ 616.757066][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.757071][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.757075][ C1] Call Trace: [ 616.757079][ C1] __sanitizer_cov_trace_switch+0x45/0x70 [ 616.757084][ C1] __secure_computing+0xda/0x360 [ 616.757088][ C1] syscall_enter_from_user_mode+0xb7/0x290 [ 616.757092][ C1] do_syscall_64+0xf/0x70 [ 616.757112][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.757116][ C1] RIP: 0033:0x7f032944e9c7 [ 616.757127][ 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 [ 616.757131][ C1] RSP: 002b:00007ffc79c11ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 616.757142][ C1] RAX: ffffffffffffffda RBX: 00007ffc79c149f0 RCX: 00007f032944e9c7 [ 616.757147][ C1] RDX: 00007f0329ebfa00 RSI: 0000000000000000 RDI: 000056259d85d9a3 [ 616.757153][ C1] RBP: 00007ffc79c11b10 R08: 0000000000000000 R09: 0000000000000000 [ 616.757159][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 616.757164][ C1] R13: 0000000000000000 R14: 00007ffc79c149f0 R15: 00007ffc79c12000 [ 616.757725][ T1167] Kernel panic - not syncing: hung_task: blocked tasks [ 617.000149][ T1167] CPU: 0 PID: 1167 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.009602][ T1167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.020585][ T1167] Call Trace: [ 617.023865][ T1167] dump_stack+0x198/0x1fd [ 617.028227][ T1167] panic+0x347/0x7c0 [ 617.032120][ T1167] ? __warn_printk+0xf3/0xf3 [ 617.036697][ T1167] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.042324][ T1167] ? preempt_schedule_thunk+0x16/0x18 [ 617.047671][ T1167] ? watchdog.cold+0x22d/0x24b [ 617.052436][ T1167] ? watchdog+0xc59/0xf30 [ 617.056766][ T1167] watchdog.cold+0x23e/0x24b [ 617.061369][ T1167] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.067080][ T1167] kthread+0x3b5/0x4a0 [ 617.071126][ T1167] ? __kthread_bind_mask+0xc0/0xc0 [ 617.076214][ T1167] ret_from_fork+0x1f/0x30 [ 617.081790][ T1167] Kernel Offset: disabled [ 617.086111][ T1167] Rebooting in 86400 seconds..