[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.061216] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.288309] random: sshd: uninitialized urandom read (32 bytes read) [ 23.593954] random: sshd: uninitialized urandom read (32 bytes read) [ 24.485546] random: sshd: uninitialized urandom read (32 bytes read) [ 598.884072] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts. [ 604.678234] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/12 17:44:56 parsed 1 programs [ 606.518875] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/12 17:44:59 executed programs: 0 [ 608.099950] IPVS: ftp: loaded support on port[0] = 21 [ 608.353295] bridge0: port 1(bridge_slave_0) entered blocking state [ 608.360323] bridge0: port 1(bridge_slave_0) entered disabled state [ 608.368917] device bridge_slave_0 entered promiscuous mode [ 608.390233] bridge0: port 2(bridge_slave_1) entered blocking state [ 608.396706] bridge0: port 2(bridge_slave_1) entered disabled state [ 608.404073] device bridge_slave_1 entered promiscuous mode [ 608.421696] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 608.440328] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 608.484372] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 608.503285] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 608.573363] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 608.580892] team0: Port device team_slave_0 added [ 608.597084] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 608.604322] team0: Port device team_slave_1 added [ 608.622624] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 608.642113] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 608.659010] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 608.680245] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 608.808506] bridge0: port 2(bridge_slave_1) entered blocking state [ 608.815092] bridge0: port 2(bridge_slave_1) entered forwarding state [ 608.822593] bridge0: port 1(bridge_slave_0) entered blocking state [ 608.829061] bridge0: port 1(bridge_slave_0) entered forwarding state [ 609.446666] 8021q: adding VLAN 0 to HW filter on device bond0 [ 609.500657] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 609.548800] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 609.555164] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 609.562868] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 609.609321] 8021q: adding VLAN 0 to HW filter on device team0 [ 861.152261] INFO: task syz-executor0:4802 blocked for more than 140 seconds. [ 861.159721] Not tainted 4.18.0-rc4+ #46 [ 861.164257] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 861.172266] syz-executor0 D21432 4802 4544 0x20020004 [ 861.178066] Call Trace: [ 861.180751] __schedule+0x87c/0x1ed0 [ 861.184531] ? __sched_text_start+0x8/0x8 [ 861.188712] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.193354] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 861.198503] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.203590] ? trace_hardirqs_on+0xd/0x10 [ 861.207818] ? prepare_to_wait_event+0x396/0xc70 [ 861.212614] ? prepare_to_wait_exclusive+0x550/0x550 [ 861.217756] schedule+0xfb/0x450 [ 861.221146] ? __schedule+0x1ed0/0x1ed0 [ 861.225146] ? check_same_owner+0x340/0x340 [ 861.229506] ? do_raw_spin_unlock+0xa7/0x2f0 [ 861.233951] ? replenish_dl_entity.cold.53+0x37/0x37 [ 861.239110] request_wait_answer+0x4c8/0x920 [ 861.243610] ? fuse_read_forget.isra.22+0xdc0/0xdc0 [ 861.248745] ? finish_wait+0x430/0x430 [ 861.252826] ? finish_wait+0x430/0x430 [ 861.256738] ? finish_wait+0x430/0x430 [ 861.260663] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.265293] ? fuse_dev_ioctl+0x430/0x430 [ 861.269478] ? kasan_check_write+0x14/0x20 [ 861.273755] ? do_raw_spin_lock+0xc1/0x200 [ 861.278053] __fuse_request_send+0x12a/0x1d0 [ 861.282523] fuse_request_send+0x62/0xa0 [ 861.286636] fuse_simple_request+0x33d/0x730 [ 861.291871] fuse_lookup_name+0x3ee/0x830 [ 861.296074] ? fuse_valid_type+0xb0/0xb0 [ 861.300173] fuse_lookup+0xf9/0x4c0 [ 861.303838] ? fuse_lookup_name+0x830/0x830 [ 861.308200] ? __lockdep_init_map+0x105/0x590 [ 861.312755] __lookup_slow+0x2b5/0x540 [ 861.316679] ? vfs_unlink+0x510/0x510 [ 861.320530] ? down_read+0xb5/0x1d0 [ 861.324183] ? lookup_slow+0x49/0x80 [ 861.327939] ? __down_interruptible+0x700/0x700 [ 861.332655] ? lookup_fast+0x470/0x12a0 [ 861.336688] ? __follow_mount_rcu.isra.36.part.37+0x890/0x890 [ 861.342621] lookup_slow+0x57/0x80 [ 861.346212] walk_component+0x94a/0x2630 [ 861.350327] ? inode_permission+0xb2/0x560 [ 861.354620] ? path_init+0x2340/0x2340 [ 861.358557] ? walk_component+0x2630/0x2630 [ 861.362935] ? trace_hardirqs_on+0xd/0x10 [ 861.367129] ? depot_save_stack+0x291/0x470 [ 861.371493] ? save_stack+0xa9/0xd0 [ 861.375158] ? save_stack+0x43/0xd0 [ 861.378859] ? kmem_cache_alloc+0x12e/0x760 [ 861.383223] ? getname_flags+0xd0/0x5a0 [ 861.387425] ? user_path_at_empty+0x2d/0x50 [ 861.391797] ? vfs_statx+0x129/0x210 [ 861.395574] path_lookupat.isra.45+0x202/0xbf0 [ 861.400196] ? find_held_lock+0x36/0x1c0 [ 861.404308] ? path_parentat.isra.43+0x160/0x160 [ 861.409108] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 861.414351] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 861.419442] ? __check_object_size+0x9d/0x5f2 [ 861.423999] ? usercopy_warn+0x120/0x120 [ 861.428117] ? kasan_check_read+0x11/0x20 [ 861.432309] ? do_raw_spin_unlock+0xa7/0x2f0 [ 861.436865] filename_lookup+0x264/0x510 [ 861.440981] ? filename_parentat.isra.58+0x570/0x570 [ 861.446140] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 861.451730] ? mpi_free.cold.1+0x19/0x19 [ 861.455831] ? save_stack+0x43/0xd0 [ 861.459495] ? kfree+0xd9/0x260 [ 861.462814] ? do_fast_syscall_32+0x34d/0xfb2 [ 861.467421] ? entry_SYSENTER_compat+0x70/0x7f [ 861.472064] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.477634] ? getname_flags+0x26e/0x5a0 [ 861.481717] user_path_at_empty+0x40/0x50 [ 861.485916] vfs_statx+0x129/0x210 [ 861.489504] ? vfs_statx_fd+0xc0/0xc0 [ 861.493357] ? debug_check_no_obj_freed+0x30b/0x595 [ 861.498422] __do_compat_sys_newstat+0x8f/0x110 [ 861.503137] ? cp_compat_stat+0xcf0/0xcf0 [ 861.507342] ? __x32_compat_sys_get_robust_list+0x430/0x430 [ 861.513132] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.518208] ? trace_hardirqs_on+0xd/0x10 [ 861.522399] ? do_fast_syscall_32+0x150/0xfb2 [ 861.526935] __ia32_compat_sys_newstat+0x52/0x70 [ 861.531755] do_fast_syscall_32+0x34d/0xfb2 [ 861.536142] ? do_int80_syscall_32+0x890/0x890 [ 861.540775] ? _raw_spin_unlock_irq+0x27/0x70 [ 861.545325] ? finish_task_switch+0x1d3/0x870 [ 861.549879] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.555463] ? syscall_return_slowpath+0x31d/0x5e0 [ 861.560443] ? sysret32_from_system_call+0x5/0x46 [ 861.565320] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 861.570216] entry_SYSENTER_compat+0x70/0x7f [ 861.574672] RIP: 0023:0xf7ff4cb9 [ 861.578085] Code: Bad RIP value. [ 861.581497] RSP: 002b:00000000f7ff00ac EFLAGS: 00000282 ORIG_RAX: 000000000000006a [ 861.589225] RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 0000000020000480 [ 861.596494] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 861.603773] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 861.611307] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 861.618593] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 861.625880] INFO: task syz-executor0:4804 blocked for more than 140 seconds. [ 861.633083] Not tainted 4.18.0-rc4+ #46 [ 861.637590] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 861.645655] syz-executor0 D24296 4804 4544 0x20020004 [ 861.651298] Call Trace: [ 861.653900] __schedule+0x87c/0x1ed0 [ 861.657677] ? __sched_text_start+0x8/0x8 [ 861.661894] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 861.666959] ? bpf_prog_kallsyms_find+0xde/0x4c0 [ 861.671784] ? graph_lock+0x170/0x170 [ 861.675630] ? graph_lock+0x170/0x170 [ 861.679446] ? is_bpf_text_address+0xae/0x170 [ 861.683949] ? lock_downgrade+0x8f0/0x8f0 [ 861.688119] schedule+0xfb/0x450 [ 861.691489] ? lock_downgrade+0x8f0/0x8f0 [ 861.695640] ? __schedule+0x1ed0/0x1ed0 [ 861.699622] ? mark_held_locks+0xc9/0x160 [ 861.703785] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 861.708376] ? _raw_spin_unlock_irq+0x27/0x70 [ 861.712902] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 861.717935] __rwsem_down_write_failed_common+0x95d/0x1630 [ 861.723593] ? rwsem_spin_on_owner+0xa40/0xa40 [ 861.728227] ? trace_hardirqs_on+0x10/0x10 [ 861.732504] ? lock_downgrade+0x8f0/0x8f0 [ 861.736688] ? kasan_check_read+0x11/0x20 [ 861.740867] ? do_raw_spin_unlock+0xa7/0x2f0 [ 861.745299] ? graph_lock+0x170/0x170 [ 861.749129] ? graph_lock+0x170/0x170 [ 861.752949] ? trace_hardirqs_on+0xd/0x10 [ 861.757122] ? graph_lock+0x170/0x170 [ 861.760922] ? find_held_lock+0x36/0x1c0 [ 861.764992] ? graph_lock+0x170/0x170 [ 861.768815] ? find_held_lock+0x36/0x1c0 [ 861.772885] ? lock_acquire+0x1e4/0x540 [ 861.776868] ? fuse_reverse_inval_entry+0xae/0x6d0 [ 861.781821] ? lock_release+0xa30/0xa30 [ 861.785803] ? check_same_owner+0x340/0x340 [ 861.790150] rwsem_down_write_failed+0xe/0x10 [ 861.794655] ? rwsem_down_write_failed+0xe/0x10 [ 861.799337] call_rwsem_down_write_failed+0x17/0x30 [ 861.804373] down_write+0xaa/0x130 [ 861.807921] ? fuse_reverse_inval_entry+0xae/0x6d0 [ 861.812860] ? down_read+0x1d0/0x1d0 [ 861.816594] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 861.822138] ? ilookup5+0x103/0x140 [ 861.825771] ? fuse_init_file_inode+0x70/0x70 [ 861.830280] fuse_reverse_inval_entry+0xae/0x6d0 [ 861.835042] ? fuse_update_attributes+0xd0/0xd0 [ 861.839710] ? print_usage_bug+0xc0/0xc0 [ 861.843784] fuse_dev_do_write+0x2d4d/0x3700 [ 861.848212] ? fuse_dev_read+0x250/0x250 [ 861.852279] ? trace_hardirqs_on+0x10/0x10 [ 861.856538] ? graph_lock+0x170/0x170 [ 861.860356] ? find_held_lock+0x36/0x1c0 [ 861.864434] ? lock_downgrade+0x8f0/0x8f0 [ 861.868588] ? kasan_check_read+0x11/0x20 [ 861.872828] ? rcu_is_watching+0x8c/0x150 [ 861.876987] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 861.881402] ? memset+0x31/0x40 [ 861.884687] fuse_dev_write+0x19a/0x240 [ 861.888667] ? fuse_dev_splice_write+0xe60/0xe60 [ 861.893426] ? expand_files.part.8+0x9c0/0x9c0 [ 861.898040] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 861.903588] ? iov_iter_init+0xc9/0x1f0 [ 861.907596] __vfs_write+0x6c6/0x9f0 [ 861.911332] ? kernel_read+0x120/0x120 [ 861.915275] ? rw_verify_area+0x118/0x360 [ 861.919455] vfs_write+0x1f8/0x560 [ 861.923125] ksys_write+0x101/0x260 [ 861.926789] ? __ia32_sys_read+0xb0/0xb0 [ 861.930906] ? kasan_check_read+0x11/0x20 [ 861.935102] __ia32_sys_write+0x71/0xb0 [ 861.939136] do_fast_syscall_32+0x34d/0xfb2 [ 861.943501] ? do_int80_syscall_32+0x890/0x890 [ 861.948141] ? kasan_check_write+0x14/0x20 [ 861.952427] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 861.958036] ? syscall_return_slowpath+0x31d/0x5e0 [ 861.963011] ? sysret32_from_system_call+0x5/0x46 [ 861.967927] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 861.972843] entry_SYSENTER_compat+0x70/0x7f [ 861.977379] RIP: 0023:0xf7ff4cb9 [ 861.980780] Code: Bad RIP value. [ 861.984211] RSP: 002b:00000000f7fcf0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000004 [ 861.991990] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000280 [ 861.999304] RDX: 0000000000000033 RSI: 0000000000000000 RDI: 0000000000000000 [ 862.006633] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 862.013939] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 862.021246] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 862.028543] [ 862.028543] Showing all locks held in the system: [ 862.034916] 1 lock held by khungtaskd/902: [ 862.039172] #0: (____ptrval____) (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 [ 862.047847] 1 lock held by rsyslogd/4412: [ 862.052060] #0: (____ptrval____) (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 862.060100] 2 locks held by getty/4502: [ 862.064109] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.072416] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.081327] 2 locks held by getty/4503: [ 862.085331] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.093656] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.102604] 2 locks held by getty/4504: [ 862.106610] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.114927] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.123845] 2 locks held by getty/4505: [ 862.127858] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.136166] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.145085] 2 locks held by getty/4506: [ 862.149069] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.157356] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.166278] 2 locks held by getty/4507: [ 862.170291] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.178587] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.187462] 2 locks held by getty/4508: [ 862.191446] #0: (____ptrval____) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 [ 862.199733] #1: (____ptrval____) (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 862.208658] 2 locks held by syz-executor0/4802: [ 862.213375] #0: (____ptrval____) (&type->i_mutex_dir_key#5){++++}, at: lookup_slow+0x49/0x80 [ 862.222113] #1: (____ptrval____) (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 [ 862.229987] 2 locks held by syz-executor0/4804: [ 862.234682] #0: (____ptrval____) (&fc->killsb){.+.+}, at: fuse_dev_do_write+0x2cbe/0x3700 [ 862.243149] #1: (____ptrval____) (&type->i_mutex_dir_key#5){++++}, at: fuse_reverse_inval_entry+0xae/0x6d0 [ 862.253083] [ 862.254737] ============================================= [ 862.254737] [ 862.261776] NMI backtrace for cpu 0 [ 862.265443] CPU: 0 PID: 902 Comm: khungtaskd Not tainted 4.18.0-rc4+ #46 [ 862.272265] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 862.281602] Call Trace: [ 862.284269] dump_stack+0x1c9/0x2b4 [ 862.287879] ? dump_stack_print_info.cold.2+0x52/0x52 [ 862.293053] ? vprintk_default+0x28/0x30 [ 862.297103] nmi_cpu_backtrace.cold.4+0x19/0xce [ 862.301754] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 862.306147] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 862.311317] nmi_trigger_cpumask_backtrace+0x151/0x192 [ 862.316575] arch_trigger_cpumask_backtrace+0x14/0x20 [ 862.321747] watchdog+0x9c4/0xf80 [ 862.325191] ? reset_hung_task_detector+0xd0/0xd0 [ 862.330023] ? kasan_check_read+0x11/0x20 [ 862.334155] ? do_raw_spin_unlock+0xa7/0x2f0 [ 862.338556] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 862.343647] ? __kthread_parkme+0x58/0x1b0 [ 862.347872] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 862.352873] ? trace_hardirqs_on+0xd/0x10 [ 862.357014] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 862.362535] ? __kthread_parkme+0x106/0x1b0 [ 862.366898] kthread+0x345/0x410 [ 862.370250] ? reset_hung_task_detector+0xd0/0xd0 [ 862.375094] ? kthread_bind+0x40/0x40 [ 862.378885] ret_from_fork+0x3a/0x50 [ 862.382696] Sending NMI from CPU 0 to CPUs 1: [ 862.387271] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 [ 862.388228] Kernel panic - not syncing: hung_task: blocked tasks [ 862.401756] CPU: 0 PID: 902 Comm: khungtaskd Not tainted 4.18.0-rc4+ #46 [ 862.408581] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 862.417933] Call Trace: [ 862.420547] dump_stack+0x1c9/0x2b4 [ 862.424194] ? dump_stack_print_info.cold.2+0x52/0x52 [ 862.429382] ? printk_safe_log_store+0x2f0/0x2f0 [ 862.434125] panic+0x238/0x4e7 [ 862.437314] ? add_taint.cold.5+0x16/0x16 [ 862.441450] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 862.446985] ? nmi_trigger_cpumask_backtrace+0x13a/0x192 [ 862.452433] ? printk_safe_flush+0xd7/0x130 [ 862.456747] watchdog+0x9d5/0xf80 [ 862.460191] ? reset_hung_task_detector+0xd0/0xd0 [ 862.465027] ? kasan_check_read+0x11/0x20 [ 862.469164] ? do_raw_spin_unlock+0xa7/0x2f0 [ 862.473565] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 862.478670] ? __kthread_parkme+0x58/0x1b0 [ 862.482892] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 862.487931] ? trace_hardirqs_on+0xd/0x10 [ 862.492126] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 862.497709] ? __kthread_parkme+0x106/0x1b0 [ 862.502019] kthread+0x345/0x410 [ 862.505368] ? reset_hung_task_detector+0xd0/0xd0 [ 862.510187] ? kthread_bind+0x40/0x40 [ 862.513969] ret_from_fork+0x3a/0x50 [ 862.518342] Dumping ftrace buffer: [ 862.521954] (ftrace buffer empty) [ 862.525729] Kernel Offset: disabled [ 862.529346] Rebooting in 86400 seconds..