Warning: Permanently added '10.128.0.145' (ECDSA) to the list of known hosts. executing program [ 616.646880][ T1171] INFO: task syz-executor600:6855 blocked for more than 143 seconds. [ 616.655169][ T1171] Not tainted 5.8.0-next-20200814-syzkaller #0 [ 616.662406][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.671299][ T1171] syz-executor600 D28096 6855 6849 0x80000002 [ 616.677776][ T1171] Call Trace: [ 616.681233][ T1171] __schedule+0x8e5/0x21e0 [ 616.685634][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.691056][ T1171] ? io_wq_cancel_all+0x5a0/0x5a0 [ 616.696097][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.701379][ T1171] schedule+0xd0/0x2a0 [ 616.705446][ T1171] io_uring_flush+0x740/0xa90 [ 616.710173][ T1171] ? io_req_task_cancel+0x20/0x20 [ 616.715268][ T1171] ? add_wait_queue_exclusive+0x180/0x180 [ 616.721093][ T1171] ? find_held_lock+0x2d/0x110 [ 616.725856][ T1171] ? lock_is_held_type+0xbb/0xf0 [ 616.730834][ T1171] ? io_req_task_cancel+0x20/0x20 [ 616.735930][ T1171] filp_close+0xb4/0x170 [ 616.740310][ T1171] put_files_struct+0x1cc/0x350 [ 616.745200][ T1171] exit_files+0x7e/0xa0 [ 616.749498][ T1171] do_exit+0xb43/0x29f0 [ 616.753661][ T1171] ? mm_update_next_owner+0x7a0/0x7a0 [ 616.759146][ T1171] ? io_submit_sqes+0x2380/0x2380 [ 616.764266][ T1171] ? __sys_socket+0x16d/0x200 [ 616.769095][ T1171] ? lock_is_held_type+0xbb/0xf0 [ 616.774040][ T1171] do_group_exit+0x125/0x310 [ 616.779411][ T1171] __x64_sys_exit_group+0x3a/0x50 [ 616.784477][ T1171] do_syscall_64+0x2d/0x70 [ 616.789157][ T1171] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.795043][ T1171] RIP: 0033:0x43f298 [ 616.799008][ T1171] Code: Bad RIP value. [ 616.803066][ T1171] RSP: 002b:00007ffeb6d09838 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 616.811545][ T1171] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f298 [ 616.819600][ T1171] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 616.827603][ T1171] RBP: 00000000004beaa8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 616.835584][ T1171] R10: 0000000000400a29 R11: 0000000000000246 R12: 0000000000000001 [ 616.843670][ T1171] R13: 00000000006d01a0 R14: 0000000000000000 R15: 0000000000000000 [ 616.851730][ T1171] [ 616.851730][ T1171] Showing all locks held in the system: [ 616.859521][ T1171] 1 lock held by khungtaskd/1171: [ 616.864525][ T1171] #0: ffffffff89c66c40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.874458][ T1171] [ 616.876847][ T1171] ============================================= [ 616.876847][ T1171] [ 616.886205][ T1171] NMI backtrace for cpu 1 [ 616.890610][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.8.0-next-20200814-syzkaller #0 [ 616.899706][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.909740][ T1171] Call Trace: [ 616.913109][ T1171] dump_stack+0x18f/0x20d [ 616.917458][ T1171] nmi_cpu_backtrace.cold+0x70/0xb1 [ 616.922696][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.928307][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.934319][ T1171] watchdog+0xd89/0xf30 [ 616.938456][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.944190][ T1171] kthread+0x3b5/0x4a0 [ 616.948322][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.953408][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.958556][ T1171] ret_from_fork+0x1f/0x30 [ 616.963065][ T1171] Sending NMI from CPU 1 to CPUs 0: [ 616.969131][ C0] NMI backtrace for cpu 0 [ 616.969138][ C0] CPU: 0 PID: 3896 Comm: systemd-journal Not tainted 5.8.0-next-20200814-syzkaller #0 [ 616.969144][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.969149][ C0] RIP: 0010:unwind_next_frame+0x17/0x1f90 [ 616.969160][ C0] Code: 0c 24 e8 7c 16 81 00 48 8b 0c 24 e9 72 ff ff ff 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 ff 41 56 41 55 41 54 55 53 <48> 81 ec a0 00 00 00 48 c7 44 24 40 b3 8a b5 41 48 8d 5c 24 40 48 [ 616.969164][ C0] RSP: 0018:ffffc900015f78e0 EFLAGS: 00000002 [ 616.969173][ C0] RAX: dffffc0000000000 RBX: ffffffff816366e0 RCX: 0000000000000000 [ 616.969179][ C0] RDX: 1ffff920002bef4e RSI: ffffffff81c3b941 RDI: ffffc900015f7918 [ 616.969184][ C0] RBP: ffffc900015f79a0 R08: ffffffff8b31425a R09: 0000000000000001 [ 616.969189][ C0] R10: 000000000007201e R11: 0000000000000001 R12: ffffc900015f79d0 [ 616.969194][ C0] R13: 0000000000000000 R14: ffff8880930bc280 R15: ffffc900015f7918 [ 616.969200][ C0] FS: 00007f26714f28c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 616.969205][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.969210][ C0] CR2: 00007f266e891000 CR3: 000000009320f000 CR4: 00000000001506f0 [ 616.969215][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.969220][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.969223][ C0] Call Trace: [ 616.969238][ C0] ? profile_setup.cold+0xc1/0xc1 [ 616.969241][ C0] arch_stack_walk+0x81/0xf0 [ 616.969245][ C0] ? filename_lookup+0x3b1/0x560 [ 616.969248][ C0] ? putname+0xe1/0x120 [ 616.969252][ C0] stack_trace_save+0x8c/0xc0 [ 616.969256][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 616.969259][ C0] kasan_save_stack+0x1b/0x40 [ 616.969263][ C0] ? kasan_save_stack+0x1b/0x40 [ 616.969267][ C0] ? kasan_set_track+0x1c/0x30 [ 616.969270][ C0] ? kasan_set_free_info+0x1b/0x30 [ 616.969274][ C0] ? __kasan_slab_free+0xd8/0x120 [ 616.969278][ C0] ? kmem_cache_free.part.0+0x67/0x1f0 [ 616.969281][ C0] ? putname+0xe1/0x120 [ 616.969285][ C0] ? filename_lookup+0x3b1/0x560 [ 616.969289][ C0] ? lock_acquire+0x1f1/0xad0 [ 616.969293][ C0] ? debug_check_no_obj_freed+0xc7/0x41c [ 616.969316][ C0] ? find_held_lock+0x2d/0x110 [ 616.969320][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 616.969323][ C0] ? lock_downgrade+0x830/0x830 [ 616.969326][ C0] ? lock_downgrade+0x830/0x830 [ 616.969329][ C0] ? lockdep_hardirqs_off+0x89/0xc0 [ 616.969333][ C0] ? trace_hardirqs_off+0x27/0x210 [ 616.969337][ C0] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 616.969340][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 616.969350][ C0] kasan_set_track+0x1c/0x30 [ 616.969354][ C0] kasan_set_free_info+0x1b/0x30 [ 616.969357][ C0] __kasan_slab_free+0xd8/0x120 [ 616.969360][ C0] ? putname+0xe1/0x120 [ 616.969363][ C0] kmem_cache_free.part.0+0x67/0x1f0 [ 616.969366][ C0] putname+0xe1/0x120 [ 616.969369][ C0] filename_lookup+0x3b1/0x560 [ 616.969372][ C0] ? may_linkat+0x2b0/0x2b0 [ 616.969376][ C0] ? __check_object_size+0x171/0x3e4 [ 616.969379][ C0] ? strncpy_from_user+0x2bf/0x3e0 [ 616.969387][ C0] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.969391][ C0] ? bpf_lsm_cred_prepare+0x5/0x10 [ 616.969394][ C0] do_faccessat+0x129/0x820 [ 616.969397][ C0] ? stream_open+0x60/0x60 [ 616.969400][ C0] ? __secure_computing+0x104/0x360 [ 616.969403][ C0] do_syscall_64+0x2d/0x70 [ 616.969407][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.969410][ C0] RIP: 0033:0x7f26707ae9c7 [ 616.969420][ 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 [ 616.969424][ C0] RSP: 002b:00007fffe2919f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 616.969432][ C0] RAX: ffffffffffffffda RBX: 00007fffe291ce50 RCX: 00007f26707ae9c7 [ 616.969436][ C0] RDX: 00007f267121fa00 RSI: 0000000000000000 RDI: 00005580040b09a3 [ 616.969441][ C0] RBP: 00007fffe2919f70 R08: 0000000000000000 R09: 0000000000000000 [ 616.969445][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 616.969450][ C0] R13: 0000000000000000 R14: 00007fffe291ce50 R15: 00007fffe291a460 [ 616.969507][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 617.390243][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.8.0-next-20200814-syzkaller #0 [ 617.399853][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.410016][ T1171] Call Trace: [ 617.413309][ T1171] dump_stack+0x18f/0x20d [ 617.417801][ T1171] panic+0x2e3/0x75c [ 617.421678][ T1171] ? __warn_printk+0xf3/0xf3 [ 617.426250][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.431885][ T1171] ? preempt_schedule_thunk+0x16/0x18 [ 617.437243][ T1171] ? watchdog.cold+0x22d/0x24b [ 617.441984][ T1171] ? watchdog+0xc59/0xf30 [ 617.446293][ T1171] watchdog.cold+0x23e/0x24b [ 617.451016][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.456731][ T1171] kthread+0x3b5/0x4a0 [ 617.460923][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.466036][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.471201][ T1171] ret_from_fork+0x1f/0x30 [ 617.477272][ T1171] Kernel Offset: disabled [ 617.481603][ T1171] Rebooting in 86400 seconds..