[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.378372] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.091845] random: sshd: uninitialized urandom read (32 bytes read) [ 24.535470] random: sshd: uninitialized urandom read (32 bytes read) [ 25.431562] random: sshd: uninitialized urandom read (32 bytes read) [ 402.605612] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.63' (ECDSA) to the list of known hosts. [ 408.152130] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 574.432204] INFO: task syz-executor061:4577 blocked for more than 140 seconds. [ 574.439756] Not tainted 4.18.0-rc4+ #145 [ 574.444392] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 574.452402] syz-executor061 D21512 4577 4574 0x00000004 [ 574.458078] Call Trace: [ 574.460700] __schedule+0x87c/0x1ed0 [ 574.465343] ? __sched_text_start+0x8/0x8 [ 574.469976] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 574.474618] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 574.479804] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 574.484912] ? trace_hardirqs_on+0xd/0x10 [ 574.489117] ? prepare_to_wait_event+0x396/0xc70 [ 574.494046] ? prepare_to_wait_exclusive+0x550/0x550 [ 574.499243] schedule+0xfb/0x450 [ 574.503072] ? __schedule+0x1ed0/0x1ed0 [ 574.507105] ? check_same_owner+0x340/0x340 [ 574.511477] ? do_raw_spin_unlock+0xa7/0x2f0 [ 574.516376] ? replenish_dl_entity.cold.53+0x37/0x37 [ 574.521528] request_wait_answer+0x4c8/0x920 [ 574.525984] ? fuse_read_forget.isra.22+0xdc0/0xdc0 [ 574.531064] ? finish_wait+0x430/0x430 [ 574.534990] ? finish_wait+0x430/0x430 [ 574.539115] ? finish_wait+0x430/0x430 [ 574.543060] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 574.547706] ? fuse_dev_ioctl+0x430/0x430 [ 574.551911] ? kasan_check_write+0x14/0x20 [ 574.556196] ? do_raw_spin_lock+0xc1/0x200 [ 574.560511] __fuse_request_send+0x12a/0x1d0 [ 574.565542] fuse_request_send+0x62/0xa0 [ 574.569651] fuse_simple_request+0x33d/0x730 [ 574.574150] fuse_lookup_name+0x3ee/0x830 [ 574.578370] ? fuse_valid_type+0xb0/0xb0 [ 574.582595] fuse_lookup+0xf9/0x4c0 [ 574.587395] ? fuse_lookup_name+0x830/0x830 [ 574.591767] ? __lockdep_init_map+0x105/0x590 [ 574.596349] __lookup_slow+0x2b5/0x540 [ 574.600300] ? vfs_unlink+0x510/0x510 [ 574.604274] ? down_read+0xb5/0x1d0 [ 574.607943] ? lookup_slow+0x49/0x80 [ 574.611750] ? __down_interruptible+0x700/0x700 [ 574.616506] ? lookup_fast+0x470/0x12a0 [ 574.620563] ? __follow_mount_rcu.isra.36.part.37+0x890/0x890 [ 574.626518] lookup_slow+0x57/0x80 [ 574.630386] walk_component+0x94a/0x2630 [ 574.634495] ? inode_permission+0xb2/0x560 [ 574.638946] ? path_init+0x2340/0x2340 [ 574.642893] ? walk_component+0x2630/0x2630 [ 574.647257] ? save_stack+0xa9/0xd0 [ 574.650925] ? save_stack+0x43/0xd0 [ 574.655047] ? kmem_cache_alloc+0x12e/0x760 [ 574.659457] ? getname_flags+0xd0/0x5a0 [ 574.663518] ? user_path_at_empty+0x2d/0x50 [ 574.667919] ? vfs_statx+0x129/0x210 [ 574.671688] path_lookupat.isra.45+0x202/0xbf0 [ 574.676496] ? find_held_lock+0x36/0x1c0 [ 574.680601] ? path_parentat.isra.43+0x160/0x160 [ 574.685430] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 574.690759] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 574.696367] ? __check_object_size+0x9d/0x5f2 [ 574.701068] ? usercopy_warn+0x120/0x120 [ 574.705193] ? kasan_check_read+0x11/0x20 [ 574.709491] ? do_raw_spin_unlock+0xa7/0x2f0 [ 574.714140] filename_lookup+0x264/0x510 [ 574.718260] ? filename_parentat.isra.58+0x570/0x570 [ 574.723705] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 574.729346] ? mpi_free.cold.1+0x19/0x19 [ 574.733693] ? kfree+0xd9/0x260 [ 574.737015] ? do_syscall_64+0x1b9/0x820 [ 574.741157] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 574.746770] ? getname_flags+0x26e/0x5a0 [ 574.750886] ? do_raw_spin_unlock+0xa7/0x2f0 [ 574.755383] user_path_at_empty+0x40/0x50 [ 574.759578] vfs_statx+0x129/0x210 [ 574.763197] ? vfs_statx_fd+0xc0/0xc0 [ 574.767064] ? debug_check_no_obj_freed+0x30b/0x595 [ 574.772158] __do_sys_newstat+0x8f/0x110 [ 574.776260] ? cp_new_stat+0xa50/0xa50 [ 574.780193] ? __x64_sys_futex+0x47f/0x6a0 [ 574.784471] ? do_futex+0x27d0/0x27d0 [ 574.788333] ? trace_hardirqs_on+0xd/0x10 [ 574.792520] ? ksys_mount+0xa8/0x140 [ 574.796272] ? do_syscall_64+0x9a/0x820 [ 574.800294] __x64_sys_newstat+0x54/0x80 [ 574.804425] do_syscall_64+0x1b9/0x820 [ 574.808351] ? finish_task_switch+0x1d3/0x870 [ 574.813067] ? syscall_return_slowpath+0x5e0/0x5e0 [ 574.818109] ? syscall_return_slowpath+0x31d/0x5e0 [ 574.823124] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 574.828885] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 574.833786] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 574.839033] RIP: 0033:0x445869 [ 574.842265] Code: Bad RIP value. [ 574.845659] RSP: 002b:00007f227e507da8 EFLAGS: 00000297 ORIG_RAX: 0000000000000004 [ 574.853428] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445869 [ 574.860802] RDX: 0000000000445869 RSI: 0000000020000480 RDI: 00000000200000c0 [ 574.868135] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 574.875445] R10: 0000000000000000 R11: 0000000000000297 R12: 0030656c69662f2e [ 574.882781] R13: 7375662f7665642f R14: 2f30656c69662f2e R15: 0000000000000001 [ 574.890129] INFO: task syz-executor061:4578 blocked for more than 140 seconds. [ 574.897548] Not tainted 4.18.0-rc4+ #145 [ 574.902168] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 574.910186] syz-executor061 D24376 4578 4574 0x00000004 [ 574.915860] Call Trace: [ 574.918485] __schedule+0x87c/0x1ed0 [ 574.922230] ? __sched_text_start+0x8/0x8 [ 574.926422] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 574.931475] ? bpf_prog_kallsyms_find+0xde/0x4c0 [ 574.936287] ? graph_lock+0x170/0x170 [ 574.940113] ? graph_lock+0x170/0x170 [ 574.943953] ? is_bpf_text_address+0xae/0x170 [ 574.948484] ? lock_downgrade+0x8f0/0x8f0 [ 574.952689] schedule+0xfb/0x450 [ 574.956093] ? lock_downgrade+0x8f0/0x8f0 [ 574.960279] ? __schedule+0x1ed0/0x1ed0 [ 574.964281] ? mark_held_locks+0xc9/0x160 [ 574.968457] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 574.973073] ? _raw_spin_unlock_irq+0x27/0x70 [ 574.977609] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 574.982651] __rwsem_down_write_failed_common+0x95d/0x1630 [ 574.988312] ? rwsem_spin_on_owner+0xa40/0xa40 [ 574.992926] ? trace_hardirqs_on+0x10/0x10 [ 574.997204] ? lock_downgrade+0x8f0/0x8f0 [ 575.001395] ? kasan_check_read+0x11/0x20 [ 575.005567] ? do_raw_spin_unlock+0xa7/0x2f0 [ 575.010005] ? graph_lock+0x170/0x170 [ 575.013864] ? graph_lock+0x170/0x170 [ 575.018090] ? trace_hardirqs_on+0xd/0x10 [ 575.022292] ? graph_lock+0x170/0x170 [ 575.026129] ? find_held_lock+0x36/0x1c0 [ 575.030213] ? graph_lock+0x170/0x170 [ 575.034416] ? find_held_lock+0x36/0x1c0 [ 575.038497] ? lock_acquire+0x1e4/0x540 [ 575.042515] ? fuse_reverse_inval_entry+0xae/0x6d0 [ 575.047501] ? lock_release+0xa30/0xa30 [ 575.051524] ? check_same_owner+0x340/0x340 [ 575.055994] rwsem_down_write_failed+0xe/0x10 [ 575.060539] ? rwsem_down_write_failed+0xe/0x10 [ 575.065242] call_rwsem_down_write_failed+0x17/0x30 [ 575.070302] down_write+0xaa/0x130 [ 575.073869] ? fuse_reverse_inval_entry+0xae/0x6d0 [ 575.078845] ? down_read+0x1d0/0x1d0 [ 575.082770] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 575.088350] ? ilookup5+0x103/0x140 [ 575.092005] ? fuse_init_file_inode+0x70/0x70 [ 575.096561] fuse_reverse_inval_entry+0xae/0x6d0 [ 575.101344] ? fuse_update_attributes+0xd0/0xd0 [ 575.106052] ? print_usage_bug+0xc0/0xc0 [ 575.110154] fuse_dev_do_write+0x2d4d/0x3700 [ 575.114948] ? fuse_dev_read+0x250/0x250 [ 575.119065] ? trace_hardirqs_on+0x10/0x10 [ 575.123356] ? graph_lock+0x170/0x170 [ 575.127197] ? find_held_lock+0x36/0x1c0 [ 575.131294] ? lock_downgrade+0x8f0/0x8f0 [ 575.135484] ? kasan_check_read+0x11/0x20 [ 575.139671] ? rcu_is_watching+0x8c/0x150 [ 575.143857] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 575.148302] ? memset+0x31/0x40 [ 575.151625] fuse_dev_write+0x19a/0x240 [ 575.155803] ? fuse_dev_splice_write+0xe60/0xe60 [ 575.161290] ? expand_files.part.8+0x9c0/0x9c0 [ 575.165922] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 575.171512] ? iov_iter_init+0xc9/0x1f0 [ 575.175633] __vfs_write+0x6c6/0x9f0 [ 575.179415] ? kernel_read+0x120/0x120 [ 575.183797] ? rw_verify_area+0x118/0x360 [ 575.188071] vfs_write+0x1f8/0x560 [ 575.191638] ksys_write+0x101/0x260 [ 575.195409] ? __ia32_sys_read+0xb0/0xb0 [ 575.199672] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 575.204293] ? _raw_spin_unlock_irq+0x27/0x70 [ 575.208835] __x64_sys_write+0x73/0xb0 [ 575.212761] do_syscall_64+0x1b9/0x820 [ 575.216681] ? syscall_return_slowpath+0x5e0/0x5e0 [ 575.221668] ? syscall_return_slowpath+0x31d/0x5e0 [ 575.226657] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 575.232084] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 575.236969] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 575.242214] RIP: 0033:0x445869 [ 575.245424] Code: Bad RIP value. [ 575.248845] RSP: 002b:00007f227e4e6da8 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 575.256616] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445869 [ 575.263935] RDX: 0000000000000033 RSI: 0000000020000280 RDI: 0000000000000003 [ 575.271262] RBP: 00000000006dac38 R08: 00007f227e4e7700 R09: 0000000000000000 [ 575.278607] R10: 00007f227e4e7700 R11: 0000000000000293 R12: 0030656c69662f2e [ 575.285925] R13: 7375662f7665642f R14: 2f30656c69662f2e R15: 0000000000000001 [ 575.293268] [ 575.293268] Showing all locks held in the system: [ 575.299669] 1 lock held by khungtaskd/902: [ 575.303949] #0: (____ptrval____) (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 [ 575.312625] 1 lock held by rsyslogd/4457: [ 575.316819] 2 locks held by getty/4547: [ 575.320832] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.329258] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.338653] 2 locks held by getty/4548: [ 575.342662] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.350951] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.359866] 2 locks held by getty/4549: [ 575.363872] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.372179] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.381089] 2 locks held by getty/4550: [ 575.385133] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.393440] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.402353] 2 locks held by getty/4551: [ 575.406354] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.414688] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.423715] 2 locks held by getty/4552: [ 575.427741] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.436130] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.445060] 2 locks held by getty/4553: [ 575.449168] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 575.457474] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 575.466410] 2 locks held by syz-executor061/4577: [ 575.471315] #0: (____ptrval____) (&type->i_mutex_dir_key#3){++++}, at: lookup_slow+0x49/0x80 [ 575.480060] #1: (____ptrval____) (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 [ 575.487952] 2 locks held by syz-executor061/4578: [ 575.492832] #0: (____ptrval____) (&fc->killsb){.+.+}, at: fuse_dev_do_write+0x2cbe/0x3700 [ 575.501299] #1: (____ptrval____) (&type->i_mutex_dir_key#3){++++}, at: fuse_reverse_inval_entry+0xae/0x6d0 [ 575.511239] [ 575.512908] ============================================= [ 575.512908] [ 575.519966] NMI backtrace for cpu 0 [ 575.523633] CPU: 0 PID: 902 Comm: khungtaskd Not tainted 4.18.0-rc4+ #145 [ 575.530551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 575.539904] Call Trace: [ 575.542494] dump_stack+0x1c9/0x2b4 [ 575.546119] ? dump_stack_print_info.cold.2+0x52/0x52 [ 575.551303] ? vprintk_default+0x28/0x30 [ 575.555366] nmi_cpu_backtrace.cold.4+0x19/0xce [ 575.560023] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 575.564427] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 575.569604] nmi_trigger_cpumask_backtrace+0x151/0x192 [ 575.574865] arch_trigger_cpumask_backtrace+0x14/0x20 [ 575.580050] watchdog+0x9c4/0xf80 [ 575.583491] ? reset_hung_task_detector+0xd0/0xd0 [ 575.588335] ? kasan_check_read+0x11/0x20 [ 575.592476] ? do_raw_spin_unlock+0xa7/0x2f0 [ 575.596895] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 575.601985] ? __kthread_parkme+0x58/0x1b0 [ 575.606207] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 575.611218] ? trace_hardirqs_on+0xd/0x10 [ 575.615356] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 575.620879] ? __kthread_parkme+0x106/0x1b0 [ 575.625184] kthread+0x345/0x410 [ 575.628642] ? reset_hung_task_detector+0xd0/0xd0 [ 575.633464] ? kthread_bind+0x40/0x40 [ 575.637251] ret_from_fork+0x3a/0x50 [ 575.641063] Sending NMI from CPU 0 to CPUs 1: [ 575.645623] NMI backtrace for cpu 1 [ 575.645634] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.18.0-rc4+ #145 [ 575.645638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 575.645651] RIP: 0010:rebalance_domains+0x232/0xd90 [ 575.645653] Code: 49 c1 ec 03 4d 89 6e c0 4c 89 eb 48 b8 00 00 00 00 00 fc ff df 41 c6 04 04 f8 e8 19 16 0c 00 85 c0 74 0d 80 3d 6c e4 3f 08 00 <0f> 84 03 07 00 00 4d 85 ed 0f 84 ab 07 00 00 49 8d 86 40 ff ff ff [ 575.645744] RSP: 0018:ffff8801daf075e8 EFLAGS: 00000246 [ 575.645750] RAX: 0000000000000001 RBX: ffff8801d9ba9a80 RCX: 1ffff1003b5e0eae [ 575.645754] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801d9ae8bb4 [ 575.645758] RBP: ffff8801daf077a8 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 575.645762] R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 1ffff1003b5e0ee8 [ 575.645766] R13: ffff8801d9ba9a80 R14: ffff8801daf07780 R15: ffffffff88e09000 [ 575.645772] FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 575.645777] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 575.645780] CR2: ffffffffff600400 CR3: 00000001b07ff000 CR4: 00000000001406e0 [ 575.645787] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 575.645791] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 575.645792] Call Trace: [ 575.645795] [ 575.645805] ? load_balance+0x3640/0x3640 [ 575.645815] ? __lock_acquire+0x7fc/0x5020 [ 575.645823] ? lock_downgrade+0x8f0/0x8f0 [ 575.645829] ? graph_lock+0x170/0x170 [ 575.645838] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 575.645846] ? find_next_bit+0x104/0x130 [ 575.645854] _nohz_idle_balance+0x636/0x820 [ 575.645863] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 575.645871] ? rebalance_domains+0xd90/0xd90 [ 575.645877] ? find_held_lock+0x36/0x1c0 [ 575.645886] ? lock_downgrade+0x8f0/0x8f0 [ 575.645895] ? kasan_check_read+0x11/0x20 [ 575.645902] ? rcu_is_watching+0x8c/0x150 [ 575.645908] ? graph_lock+0x170/0x170 [ 575.645917] run_rebalance_domains+0x2c6/0x4c0 [ 575.645925] ? _nohz_idle_balance+0x820/0x820 [ 575.645930] ? rcu_is_watching+0x8c/0x150 [ 575.645936] ? rcu_pm_notify+0xc0/0xc0 [ 575.645945] __do_softirq+0x2e8/0xb17 [ 575.645953] ? __irqentry_text_end+0x1f97a8/0x1f97a8 [ 575.645958] ? rcu_is_watching+0x8c/0x150 [ 575.645964] ? rcu_pm_notify+0xc0/0xc0 [ 575.645970] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 575.645980] ? rcu_read_lock_sched_held+0x108/0x120 [ 575.645988] ? raise_softirq_irqoff+0x286/0x330 [ 575.645994] ? irq_exit+0x200/0x200 [ 575.646002] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 575.646010] ? sched_set_stop_task+0x290/0x290 [ 575.646017] irq_exit+0x1d1/0x200 [ 575.646024] scheduler_ipi+0x53c/0xa50 [ 575.646031] ? migration_cpu_stop+0x470/0x470 [ 575.646038] ? kasan_check_read+0x11/0x20 [ 575.646054] ? rcu_nmi_exit+0xe0/0x2d0 [ 575.646060] ? rcu_idle_enter+0x480/0x480 [ 575.646069] ? clockevents_program_event+0x140/0x370 [ 575.646077] ? task_prio+0x50/0x50 [ 575.646085] smp_reschedule_interrupt+0xf5/0x670 [ 575.646092] ? smp_thermal_interrupt+0x820/0x820 [ 575.646099] ? _raw_spin_unlock+0x22/0x30 [ 575.646108] ? handle_edge_irq+0x330/0x870 [ 575.646114] ? task_prio+0x50/0x50 [ 575.646125] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 575.646132] reschedule_interrupt+0xf/0x20 [ 575.646134] [ 575.646142] RIP: 0010:native_safe_halt+0x6/0x10 [ 575.646143] Code: c7 48 89 45 d8 e8 ba ff 25 fa 48 8b 45 d8 e9 d2 fe ff ff 48 89 df e8 a9 ff 25 fa eb 8a 90 90 90 90 90 90 90 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 [ 575.646230] RSP: 0018:ffff8801d9af7c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 [ 575.646236] RAX: dffffc0000000000 RBX: 1ffff1003b35ef8a RCX: 0000000000000000 [ 575.646241] RDX: 1ffffffff11e3610 RSI: 0000000000000001 RDI: ffffffff88f1b080 [ 575.646244] RBP: ffff8801d9af7c38 R08: ffffed003b5e46d7 R09: 0000000000000000 [ 575.646248] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 575.646252] R13: ffff8801d9af7cf0 R14: ffffffff899ed0e0 R15: 0000000000000000 [ 575.646262] ? trace_hardirqs_on+0xd/0x10 [ 575.646268] default_idle+0xc7/0x450 [ 575.646275] ? __sched_text_end+0x3/0x3 [ 575.646281] ? rcu_idle_enter+0x30a/0x480 [ 575.646287] ? rcu_eqs_special_set+0x1b0/0x1b0 [ 575.646296] ? tsc_verify_tsc_adjust+0x109/0x380 [ 575.646303] ? mark_tsc_async_resets+0x20/0x20 [ 575.646310] ? tick_nohz_idle_enter+0x219/0x320 [ 575.646319] arch_cpu_idle+0x10/0x20 [ 575.646326] default_idle_call+0x6d/0x90 [ 575.646332] do_idle+0x3aa/0x570 [ 575.646340] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 575.646346] ? arch_cpu_idle_exit+0x70/0x70 [ 575.646353] ? trace_hardirqs_on+0xd/0x10 [ 575.646359] ? complete+0x62/0x80 [ 575.646366] cpu_startup_entry+0x10c/0x120 [ 575.646372] ? cpu_in_idle+0x20/0x20 [ 575.646380] start_secondary+0x433/0x5d0 [ 575.646387] ? set_cpu_sibling_map+0x18b0/0x18b0 [ 575.646396] secondary_startup_64+0xa5/0xb0 [ 575.646623] Kernel panic - not syncing: hung_task: blocked tasks [ 576.117753] CPU: 0 PID: 902 Comm: khungtaskd Not tainted 4.18.0-rc4+ #145 [ 576.124660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 576.133998] Call Trace: [ 576.136594] dump_stack+0x1c9/0x2b4 [ 576.140220] ? dump_stack_print_info.cold.2+0x52/0x52 [ 576.145400] ? printk_safe_log_store+0x2f0/0x2f0 [ 576.150152] panic+0x238/0x4e7 [ 576.153332] ? add_taint.cold.5+0x16/0x16 [ 576.157485] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 576.163012] ? nmi_trigger_cpumask_backtrace+0x13a/0x192 [ 576.168462] ? printk_safe_flush+0xd7/0x130 [ 576.172791] watchdog+0x9d5/0xf80 [ 576.176254] ? reset_hung_task_detector+0xd0/0xd0 [ 576.181092] ? kasan_check_read+0x11/0x20 [ 576.185225] ? do_raw_spin_unlock+0xa7/0x2f0 [ 576.189641] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 576.194744] ? __kthread_parkme+0x58/0x1b0 [ 576.198989] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 576.204011] ? trace_hardirqs_on+0xd/0x10 [ 576.208181] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 576.213757] ? __kthread_parkme+0x106/0x1b0 [ 576.218079] kthread+0x345/0x410 [ 576.221437] ? reset_hung_task_detector+0xd0/0xd0 [ 576.226443] ? kthread_bind+0x40/0x40 [ 576.230239] ret_from_fork+0x3a/0x50 [ 576.234709] Dumping ftrace buffer: [ 576.238369] (ftrace buffer empty) [ 576.242070] Kernel Offset: disabled [ 576.245698] Rebooting in 86400 seconds..