Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 595.755676][ T1170] INFO: task syz-executor417:6851 blocked for more than 143 seconds. [ 595.764093][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 595.772908][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.782631][ T1170] task:syz-executor417 state:D stack:28104 pid: 6851 ppid: 6845 flags:0x00004000 [ 595.791926][ T1170] Call Trace: [ 595.795350][ T1170] __schedule+0xea9/0x2230 [ 595.799979][ T1170] ? io_schedule_timeout+0x140/0x140 [ 595.805291][ T1170] schedule+0xd0/0x2a0 [ 595.809448][ T1170] schedule_timeout+0x1d8/0x250 [ 595.814321][ T1170] ? usleep_range+0x170/0x170 [ 595.819210][ T1170] ? lock_downgrade+0x830/0x830 [ 595.824097][ T1170] ? do_raw_spin_lock+0x120/0x2b0 [ 595.829238][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.834466][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 595.840522][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.845832][ T1170] wait_for_completion+0x163/0x260 [ 595.850974][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 595.857020][ T1170] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 595.863656][ T1170] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 595.869615][ T1170] ? __kthread_bind_mask+0xa1/0xc0 [ 595.874816][ T1170] io_uring_setup+0x1495/0x29a0 [ 595.879778][ T1170] ? io_sq_thread+0xe00/0xe00 [ 595.884483][ T1170] ? io_issue_sqe+0x5bb0/0x5bb0 [ 595.889545][ T1170] ? io_wake_function+0x2e0/0x2e0 [ 595.894602][ T1170] ? check_preemption_disabled+0x50/0x130 [ 595.900385][ T1170] ? syscall_enter_from_user_mode+0x20/0x290 [ 595.907047][ T1170] ? lockdep_hardirqs_on+0x53/0x100 [ 595.912291][ T1170] do_syscall_64+0x2d/0x70 [ 595.916780][ T1170] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 595.922681][ T1170] RIP: 0033:0x440299 [ 595.926635][ T1170] Code: Bad RIP value. [ 595.930713][ T1170] RSP: 002b:00007ffd98794918 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 595.939214][ T1170] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 595.947267][ T1170] RDX: 0000000000400b40 RSI: 0000000020000040 RDI: 0000000000004e24 [ 595.955269][ T1170] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 595.963401][ T1170] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 595.971464][ T1170] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 595.979565][ T1170] INFO: task io_uring-sq:6852 blocked for more than 143 seconds. [ 595.987358][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 595.994391][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 596.003132][ T1170] task:io_uring-sq state:D stack:31200 pid: 6852 ppid: 2 flags:0x00004000 [ 596.012465][ T1170] Call Trace: [ 596.015844][ T1170] __schedule+0xea9/0x2230 [ 596.020294][ T1170] ? io_schedule_timeout+0x140/0x140 [ 596.025647][ T1170] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 596.031496][ T1170] schedule+0xd0/0x2a0 [ 596.037228][ T1170] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 596.043039][ T1170] schedule_preempt_disabled+0xf/0x20 [ 596.048488][ T1170] kthread+0x2ac/0x4a0 [ 596.052589][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 596.057861][ T1170] ret_from_fork+0x1f/0x30 [ 596.062332][ T1170] [ 596.062332][ T1170] Showing all locks held in the system: [ 596.070147][ T1170] 1 lock held by khungtaskd/1170: [ 596.075203][ T1170] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 596.085188][ T1170] 1 lock held by in:imklog/6538: [ 596.090194][ T1170] #0: ffff8880a3ff4170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 596.099436][ T1170] [ 596.101768][ T1170] ============================================= [ 596.101768][ T1170] [ 596.110232][ T1170] NMI backtrace for cpu 1 [ 596.114564][ T1170] CPU: 1 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.124023][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.134077][ T1170] Call Trace: [ 596.137450][ T1170] dump_stack+0x198/0x1fd [ 596.141770][ T1170] nmi_cpu_backtrace.cold+0x44/0xd7 [ 596.147057][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.152692][ T1170] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 596.158739][ T1170] watchdog+0xd89/0xf30 [ 596.162881][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 596.168599][ T1170] kthread+0x3b5/0x4a0 [ 596.172646][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 596.177758][ T1170] ret_from_fork+0x1f/0x30 [ 596.182318][ T1170] Sending NMI from CPU 1 to CPUs 0: [ 596.188519][ C0] NMI backtrace for cpu 0 [ 596.188527][ C0] CPU: 0 PID: 3901 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.188534][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.188538][ C0] RIP: 0010:rcu_is_watching+0x74/0xb0 [ 596.188550][ C0] Code: df 48 8d bb 28 01 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 25 8b 83 28 01 00 00 e8 83 e0 01 65 ff 0d 00 89 a0 7e 74 06 48 83 c4 08 5b c3 e8 d2 [ 596.188555][ C0] RSP: 0018:ffffc90005307a48 EFLAGS: 00000046 [ 596.188565][ C0] RAX: 00000000000434f2 RBX: ffff8880ae636dc0 RCX: 1ffffffff130b120 [ 596.188571][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880ae636ee8 [ 596.188577][ C0] RBP: 00007f82abac29c7 R08: ffffffff8ba70cac R09: ffffffff8ba70cb0 [ 596.188584][ C0] R10: 000000000007201e R11: 0000000000000001 R12: ffffc90005307b58 [ 596.188590][ C0] R13: 0000000000000000 R14: ffff888093b403c0 R15: 0000000000000000 [ 596.188597][ C0] FS: 00007f82ac8068c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 596.188602][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 596.188608][ C0] CR2: 00007f82a9baa008 CR3: 000000009347d000 CR4: 00000000001506f0 [ 596.188614][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 596.188621][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 596.188625][ C0] Call Trace: [ 596.188629][ C0] ? __unwind_start+0x517/0x800 [ 596.188634][ C0] kernel_text_address+0x56/0xf0 [ 596.188646][ C0] __kernel_text_address+0x9/0x30 [ 596.188651][ C0] unwind_get_return_address+0x51/0x90 [ 596.188656][ C0] ? profile_setup.cold+0xc1/0xc1 [ 596.188660][ C0] arch_stack_walk+0x97/0xf0 [ 596.188665][ C0] ? __put_cred+0x1de/0x250 [ 596.188669][ C0] stack_trace_save+0x8c/0xc0 [ 596.188674][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 596.188678][ C0] ? __put_cred+0x1de/0x250 [ 596.188683][ C0] ? revert_creds+0x1a8/0x1f0 [ 596.188687][ C0] kasan_save_stack+0x1b/0x40 [ 596.188692][ C0] ? kasan_save_stack+0x1b/0x40 [ 596.188696][ C0] ? kasan_set_track+0x1c/0x30 [ 596.188701][ C0] ? kasan_set_free_info+0x1b/0x30 [ 596.188705][ C0] ? __kasan_slab_free+0xd8/0x120 [ 596.188710][ C0] ? kmem_cache_free.part.0+0x74/0x1e0 [ 596.188715][ C0] ? __put_cred+0x1de/0x250 [ 596.188719][ C0] ? revert_creds+0x1a8/0x1f0 [ 596.188723][ C0] ? do_faccessat+0x2ca/0x820 [ 596.188728][ C0] ? do_syscall_64+0x2d/0x70 [ 596.188733][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.188737][ C0] ? find_held_lock+0x2d/0x110 [ 596.188742][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.188746][ C0] ? find_held_lock+0x2d/0x110 [ 596.188751][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 596.188755][ C0] ? lock_downgrade+0x830/0x830 [ 596.188760][ C0] ? do_raw_spin_unlock+0x171/0x230 [ 596.188765][ C0] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 596.188770][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 596.188774][ C0] kasan_set_track+0x1c/0x30 [ 596.188779][ C0] kasan_set_free_info+0x1b/0x30 [ 596.188783][ C0] __kasan_slab_free+0xd8/0x120 [ 596.188788][ C0] ? __put_cred+0x1de/0x250 [ 596.188792][ C0] kmem_cache_free.part.0+0x74/0x1e0 [ 596.188796][ C0] __put_cred+0x1de/0x250 [ 596.188799][ C0] revert_creds+0x1a8/0x1f0 [ 596.188803][ C0] do_faccessat+0x2ca/0x820 [ 596.188807][ C0] ? stream_open+0x60/0x60 [ 596.188810][ C0] ? __secure_computing+0x104/0x360 [ 596.188813][ C0] do_syscall_64+0x2d/0x70 [ 596.188815][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.188818][ C0] RIP: 0033:0x7f82abac29c7 [ 596.188825][ C0] 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 [ 596.188828][ C0] RSP: 002b:00007fff61201628 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 596.188834][ C0] RAX: ffffffffffffffda RBX: 00007fff61204540 RCX: 00007f82abac29c7 [ 596.188838][ C0] RDX: 00007f82ac533a00 RSI: 0000000000000000 RDI: 000055fc11f019a3 [ 596.188841][ C0] RBP: 00007fff61201660 R08: 0000000000000000 R09: 0000000000000000 [ 596.188845][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 596.188849][ C0] R13: 0000000000000000 R14: 00007fff61204540 R15: 00007fff61201b50 [ 596.189905][ T1170] Kernel panic - not syncing: hung_task: blocked tasks [ 596.615449][ T1170] CPU: 1 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.624895][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.634949][ T1170] Call Trace: [ 596.638229][ T1170] dump_stack+0x198/0x1fd [ 596.642606][ T1170] panic+0x347/0x7c0 [ 596.646502][ T1170] ? __warn_printk+0xf3/0xf3 [ 596.651299][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.656922][ T1170] ? preempt_schedule_thunk+0x16/0x18 [ 596.662298][ T1170] ? watchdog.cold+0x22d/0x24b [ 596.667051][ T1170] ? watchdog+0xc59/0xf30 [ 596.671366][ T1170] watchdog.cold+0x23e/0x24b [ 596.675947][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 596.681654][ T1170] kthread+0x3b5/0x4a0 [ 596.685723][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 596.690836][ T1170] ret_from_fork+0x1f/0x30 [ 596.696568][ T1170] Kernel Offset: disabled [ 596.700920][ T1170] Rebooting in 86400 seconds..