INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 syzkaller login: [ 39.102779] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.router_solicitations = 0 RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 39.398805] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 39.799602] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 39.805816] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.848451] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.891150] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 39.932109] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 39.938219] 8021q: adding VLAN 0 to HW filter on device team0 [ 39.977217] ================================================================== [ 39.984680] BUG: KASAN: use-after-free in skb_release_data+0x19b/0x860 [ 39.991342] Write of size 4 at addr ffff8801d825e420 by task syzkaller069917/4484 [ 39.998946] [ 40.000562] CPU: 0 PID: 4484 Comm: syzkaller069917 Not tainted 4.16.0+ #17 [ 40.007562] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.016994] Call Trace: [ 40.019570] dump_stack+0x1b9/0x294 [ 40.023190] ? dump_stack_print_info.cold.2+0x52/0x52 [ 40.028373] ? printk+0x9e/0xba [ 40.031883] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 40.036625] ? kasan_check_write+0x14/0x20 [ 40.040843] print_address_description+0x6c/0x20b [ 40.045667] ? skb_release_data+0x19b/0x860 [ 40.049973] kasan_report.cold.7+0xac/0x2f5 [ 40.054277] check_memory_region+0x13e/0x1b0 [ 40.058667] kasan_check_write+0x14/0x20 [ 40.062719] skb_release_data+0x19b/0x860 [ 40.066852] ? skb_tx_error+0x2f0/0x2f0 [ 40.070812] ? kasan_check_read+0x11/0x20 [ 40.074942] ? rcu_is_watching+0x85/0x140 [ 40.079078] ? kasan_check_write+0x14/0x20 [ 40.083304] ? sock_rmem_free+0x6f/0x90 [ 40.087262] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.092780] skb_release_all+0x4a/0x60 [ 40.096651] kfree_skb+0x195/0x560 [ 40.100183] ? skb_queue_purge+0x19/0x40 [ 40.104244] ? __kfree_skb+0x20/0x20 [ 40.107960] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 40.112534] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 40.117623] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.122624] ? trace_hardirqs_on+0xd/0x10 [ 40.126753] ? skb_dequeue+0x12f/0x180 [ 40.130624] skb_queue_purge+0x19/0x40 [ 40.134495] packet_sock_destruct+0x93/0x290 [ 40.138886] ? packet_mm_close+0xc0/0xc0 [ 40.142930] ? graph_lock+0x170/0x170 [ 40.146720] ? __free_object+0x16e/0x330 [ 40.150765] ? __list_del_entry_valid.cold.1+0x58/0x58 [ 40.156035] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 40.160603] ? packet_mm_close+0xc0/0xc0 [ 40.164647] __sk_destruct+0xff/0xa40 [ 40.168432] ? sock_warn_obsolete_bsdism+0xb0/0xb0 [ 40.173345] ? graph_lock+0x170/0x170 [ 40.177144] ? lock_downgrade+0x8e0/0x8e0 [ 40.181362] ? __lock_is_held+0xb5/0x140 [ 40.185419] ? kasan_check_read+0x11/0x20 [ 40.189734] ? do_raw_spin_unlock+0x9e/0x2e0 [ 40.194128] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 40.198704] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 40.203801] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.209321] ? refcount_sub_and_test+0x212/0x330 [ 40.214073] ? refcount_inc_not_zero+0x2d0/0x2d0 [ 40.218817] ? refcount_inc_not_zero+0x2d0/0x2d0 [ 40.223562] ? pcpu_free_area+0xa90/0xa90 [ 40.227726] sk_destruct+0x78/0x90 [ 40.231252] __sk_free+0x22e/0x340 [ 40.234780] sk_free+0x42/0x50 [ 40.237963] packet_release+0xa18/0xd50 [ 40.241919] ? lock_downgrade+0x8e0/0x8e0 [ 40.246050] ? packet_lookup_frame+0x270/0x270 [ 40.250612] ? cpumask_weight.constprop.5+0x44/0x44 [ 40.255611] ? do_raw_spin_lock+0xc1/0x200 [ 40.259830] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.265530] ? locks_remove_file+0x3f7/0x5a0 [ 40.269921] ? fcntl_setlk+0x1020/0x1020 [ 40.273962] ? fsnotify+0x415/0x1100 [ 40.277666] ? fsnotify_first_mark+0x330/0x330 [ 40.282237] sock_release+0x96/0x1b0 [ 40.285933] ? sock_alloc_file+0x4e0/0x4e0 [ 40.290149] sock_close+0x16/0x20 [ 40.293582] __fput+0x34d/0x890 [ 40.296850] ? fput+0x1a0/0x1a0 [ 40.300121] ? check_same_owner+0x320/0x320 [ 40.304426] ____fput+0x15/0x20 [ 40.307772] task_work_run+0x1e4/0x290 [ 40.311648] ? task_work_cancel+0x240/0x240 [ 40.315961] ? switch_task_namespaces+0xbd/0xd0 [ 40.320614] do_exit+0x1aee/0x2730 [ 40.324154] ? do_raw_spin_unlock+0x31/0x2e0 [ 40.328562] ? mm_update_next_owner+0x980/0x980 [ 40.333247] ? kasan_check_write+0x14/0x20 [ 40.337488] ? do_raw_spin_lock+0xc1/0x200 [ 40.341709] ? trace_hardirqs_off+0xd/0x10 [ 40.345934] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 40.351370] ? debug_check_no_obj_freed+0x2ff/0x584 [ 40.356375] ? trace_hardirqs_off+0xd/0x10 [ 40.360602] ? quarantine_put+0xeb/0x190 [ 40.364660] ? kfree+0x111/0x260 [ 40.368023] ? ___sys_sendmsg+0x31a/0x940 [ 40.372158] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.377173] ? trace_hardirqs_on+0xd/0x10 [ 40.381333] ? ___sys_sendmsg+0x31f/0x940 [ 40.385476] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.391000] ? copy_msghdr_from_user+0x560/0x560 [ 40.395740] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 40.400478] ? graph_lock+0x170/0x170 [ 40.404259] ? graph_lock+0x170/0x170 [ 40.408056] ? find_held_lock+0x36/0x1c0 [ 40.412100] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.417620] ? __fget_light+0x2ef/0x430 [ 40.421577] ? fget_raw+0x20/0x20 [ 40.425014] ? find_held_lock+0x36/0x1c0 [ 40.429068] ? lock_downgrade+0x8e0/0x8e0 [ 40.433200] ? handle_mm_fault+0x8c0/0xc70 [ 40.437428] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.442954] ? sockfd_lookup_light+0xc5/0x160 [ 40.447448] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.452974] ? __sys_sendmsg+0x1aa/0x270 [ 40.457034] ? SyS_shutdown+0x30/0x30 [ 40.460834] ? __do_page_fault+0x441/0xe40 [ 40.465074] do_group_exit+0x16f/0x430 [ 40.468954] ? SyS_exit+0x30/0x30 [ 40.472398] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 40.477323] ? do_syscall_64+0xb7/0x9d0 [ 40.481282] ? do_group_exit+0x430/0x430 [ 40.485330] SyS_exit_group+0x1d/0x20 [ 40.489121] do_syscall_64+0x29e/0x9d0 [ 40.493007] ? vmalloc_sync_all+0x30/0x30 [ 40.497228] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.502534] ? syscall_return_slowpath+0x5c0/0x5c0 [ 40.507497] ? syscall_return_slowpath+0x30f/0x5c0 [ 40.512418] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 40.517779] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.522618] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.527831] RIP: 0033:0x4418d9 [ 40.531005] RSP: 002b:00007ffc9c513e68 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 40.538698] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418d9 [ 40.545967] RDX: 00000000004418d9 RSI: 0000000000000000 RDI: 0000000000000001 [ 40.553218] RBP: 00000000004a34d8 R08: 0000000001a0c6b0 R09: 00000000006cd018 [ 40.560900] R10: 0000000001a0c6b0 R11: 0000000000000202 R12: 00007ffc9c513f78 [ 40.568163] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 40.575420] [ 40.577048] Allocated by task 4484: [ 40.580663] save_stack+0x43/0xd0 [ 40.584095] kasan_kmalloc+0xc4/0xe0 [ 40.587786] __kmalloc_node_track_caller+0x47/0x70 [ 40.592800] __kmalloc_reserve.isra.38+0x3a/0xe0 [ 40.597533] __alloc_skb+0x14d/0x780 [ 40.601238] alloc_skb_with_frags+0x137/0x760 [ 40.605727] sock_alloc_send_pskb+0x87a/0xae0 [ 40.610208] packet_sendmsg+0x1bd1/0x6100 [ 40.614340] sock_sendmsg+0xd5/0x120 [ 40.618137] ___sys_sendmsg+0x805/0x940 [ 40.622096] __sys_sendmsg+0x115/0x270 [ 40.625962] SyS_sendmsg+0x29/0x30 [ 40.629486] do_syscall_64+0x29e/0x9d0 [ 40.633362] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.638524] [ 40.640146] Freed by task 4484: [ 40.643407] save_stack+0x43/0xd0 [ 40.646838] __kasan_slab_free+0x11a/0x170 [ 40.651053] kasan_slab_free+0xe/0x10 [ 40.654829] kfree+0xd9/0x260 [ 40.657916] skb_free_head+0x99/0xc0 [ 40.661612] skb_release_data+0x690/0x860 [ 40.665758] skb_release_all+0x4a/0x60 [ 40.669625] kfree_skb+0x195/0x560 [ 40.673144] ip6_tnl_start_xmit+0xa44/0x2290 [ 40.677537] dev_hard_start_xmit+0x264/0xc10 [ 40.681922] __dev_queue_xmit+0x2724/0x34c0 [ 40.686241] dev_queue_xmit+0x17/0x20 [ 40.690030] packet_sendmsg+0x411d/0x6100 [ 40.694165] sock_sendmsg+0xd5/0x120 [ 40.697856] ___sys_sendmsg+0x805/0x940 [ 40.701811] __sys_sendmsg+0x115/0x270 [ 40.705696] SyS_sendmsg+0x29/0x30 [ 40.709216] do_syscall_64+0x29e/0x9d0 [ 40.713082] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.718338] [ 40.719947] The buggy address belongs to the object at ffff8801d825e340 [ 40.719947] which belongs to the cache kmalloc-512 of size 512 [ 40.732761] The buggy address is located 224 bytes inside of [ 40.732761] 512-byte region [ffff8801d825e340, ffff8801d825e540) [ 40.744699] The buggy address belongs to the page: [ 40.749622] page:ffffea0007609780 count:1 mapcount:0 mapping:ffff8801d825e0c0 index:0x0 [ 40.757743] flags: 0x2fffc0000000100(slab) [ 40.761959] raw: 02fffc0000000100 ffff8801d825e0c0 0000000000000000 0000000100000006 [ 40.769829] raw: ffffea00076221e0 ffffea00076540a0 ffff8801dac00940 0000000000000000 [ 40.777685] page dumped because: kasan: bad access detected [ 40.783373] [ 40.784988] Memory state around the buggy address: [ 40.790683] ffff8801d825e300: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 40.798021] ffff8801d825e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.805360] >ffff8801d825e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.812693] ^ [ 40.817085] ffff8801d825e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.824421] ffff8801d825e500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.831755] ================================================================== [ 40.839176] Disabling lock debugging due to kernel taint [ 40.844838] Kernel panic - not syncing: panic_on_warn set ... [ 40.844838] [ 40.852193] CPU: 0 PID: 4484 Comm: syzkaller069917 Tainted: G B 4.16.0+ #17 [ 40.860485] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.870078] Call Trace: [ 40.872648] dump_stack+0x1b9/0x294 [ 40.876263] ? dump_stack_print_info.cold.2+0x52/0x52 [ 40.881434] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.886171] ? skb_release_data+0xd0/0x860 [ 40.890383] panic+0x22f/0x4de [ 40.893562] ? add_taint.cold.5+0x16/0x16 [ 40.897692] ? do_raw_spin_unlock+0x9e/0x2e0 [ 40.902088] ? do_raw_spin_unlock+0x9e/0x2e0 [ 40.906474] ? skb_release_data+0x19b/0x860 [ 40.910777] kasan_end_report+0x47/0x4f [ 40.914729] kasan_report.cold.7+0xc9/0x2f5 [ 40.919032] check_memory_region+0x13e/0x1b0 [ 40.923417] kasan_check_write+0x14/0x20 [ 40.927457] skb_release_data+0x19b/0x860 [ 40.931594] ? skb_tx_error+0x2f0/0x2f0 [ 40.935551] ? kasan_check_read+0x11/0x20 [ 40.939786] ? rcu_is_watching+0x85/0x140 [ 40.943920] ? kasan_check_write+0x14/0x20 [ 40.948132] ? sock_rmem_free+0x6f/0x90 [ 40.952086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.957601] skb_release_all+0x4a/0x60 [ 40.961466] kfree_skb+0x195/0x560 [ 40.964985] ? skb_queue_purge+0x19/0x40 [ 40.969037] ? __kfree_skb+0x20/0x20 [ 40.972731] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 40.977293] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 40.982376] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.987369] ? trace_hardirqs_on+0xd/0x10 [ 40.991504] ? skb_dequeue+0x12f/0x180 [ 40.995368] skb_queue_purge+0x19/0x40 [ 40.999238] packet_sock_destruct+0x93/0x290 [ 41.003622] ? packet_mm_close+0xc0/0xc0 [ 41.007662] ? graph_lock+0x170/0x170 [ 41.011446] ? __free_object+0x16e/0x330 [ 41.015487] ? __list_del_entry_valid.cold.1+0x58/0x58 [ 41.020743] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 41.025326] ? packet_mm_close+0xc0/0xc0 [ 41.029367] __sk_destruct+0xff/0xa40 [ 41.033245] ? sock_warn_obsolete_bsdism+0xb0/0xb0 [ 41.038158] ? graph_lock+0x170/0x170 [ 41.041940] ? lock_downgrade+0x8e0/0x8e0 [ 41.046074] ? __lock_is_held+0xb5/0x140 [ 41.050210] ? kasan_check_read+0x11/0x20 [ 41.054348] ? do_raw_spin_unlock+0x9e/0x2e0 [ 41.058758] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 41.063334] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 41.068435] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.073962] ? refcount_sub_and_test+0x212/0x330 [ 41.078703] ? refcount_inc_not_zero+0x2d0/0x2d0 [ 41.083436] ? refcount_inc_not_zero+0x2d0/0x2d0 [ 41.088170] ? pcpu_free_area+0xa90/0xa90 [ 41.092387] sk_destruct+0x78/0x90 [ 41.095904] __sk_free+0x22e/0x340 [ 41.099436] sk_free+0x42/0x50 [ 41.102619] packet_release+0xa18/0xd50 [ 41.106572] ? lock_downgrade+0x8e0/0x8e0 [ 41.110699] ? packet_lookup_frame+0x270/0x270 [ 41.115347] ? cpumask_weight.constprop.5+0x44/0x44 [ 41.120341] ? do_raw_spin_lock+0xc1/0x200 [ 41.124555] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.130077] ? locks_remove_file+0x3f7/0x5a0 [ 41.134462] ? fcntl_setlk+0x1020/0x1020 [ 41.138501] ? fsnotify+0x415/0x1100 [ 41.142197] ? fsnotify_first_mark+0x330/0x330 [ 41.146758] sock_release+0x96/0x1b0 [ 41.150458] ? sock_alloc_file+0x4e0/0x4e0 [ 41.154667] sock_close+0x16/0x20 [ 41.158186] __fput+0x34d/0x890 [ 41.161442] ? fput+0x1a0/0x1a0 [ 41.164701] ? check_same_owner+0x320/0x320 [ 41.169269] ____fput+0x15/0x20 [ 41.172563] task_work_run+0x1e4/0x290 [ 41.176429] ? task_work_cancel+0x240/0x240 [ 41.180736] ? switch_task_namespaces+0xbd/0xd0 [ 41.185391] do_exit+0x1aee/0x2730 [ 41.188922] ? do_raw_spin_unlock+0x31/0x2e0 [ 41.193312] ? mm_update_next_owner+0x980/0x980 [ 41.197961] ? kasan_check_write+0x14/0x20 [ 41.202172] ? do_raw_spin_lock+0xc1/0x200 [ 41.206730] ? trace_hardirqs_off+0xd/0x10 [ 41.210954] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 41.216046] ? debug_check_no_obj_freed+0x2ff/0x584 [ 41.221135] ? trace_hardirqs_off+0xd/0x10 [ 41.225347] ? quarantine_put+0xeb/0x190 [ 41.229413] ? kfree+0x111/0x260 [ 41.232777] ? ___sys_sendmsg+0x31a/0x940 [ 41.236912] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.241905] ? trace_hardirqs_on+0xd/0x10 [ 41.246034] ? ___sys_sendmsg+0x31f/0x940 [ 41.250164] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.255682] ? copy_msghdr_from_user+0x560/0x560 [ 41.260591] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 41.265408] ? graph_lock+0x170/0x170 [ 41.269186] ? graph_lock+0x170/0x170 [ 41.272980] ? find_held_lock+0x36/0x1c0 [ 41.277020] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.282545] ? __fget_light+0x2ef/0x430 [ 41.286500] ? fget_raw+0x20/0x20 [ 41.289934] ? find_held_lock+0x36/0x1c0 [ 41.293980] ? lock_downgrade+0x8e0/0x8e0 [ 41.298110] ? handle_mm_fault+0x8c0/0xc70 [ 41.302330] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.307848] ? sockfd_lookup_light+0xc5/0x160 [ 41.312327] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.317989] ? __sys_sendmsg+0x1aa/0x270 [ 41.322063] ? SyS_shutdown+0x30/0x30 [ 41.325860] ? __do_page_fault+0x441/0xe40 [ 41.330086] do_group_exit+0x16f/0x430 [ 41.333953] ? SyS_exit+0x30/0x30 [ 41.337388] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 41.342209] ? do_syscall_64+0xb7/0x9d0 [ 41.346162] ? do_group_exit+0x430/0x430 [ 41.350201] SyS_exit_group+0x1d/0x20 [ 41.353981] do_syscall_64+0x29e/0x9d0 [ 41.357850] ? vmalloc_sync_all+0x30/0x30 [ 41.361974] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 41.366709] ? syscall_return_slowpath+0x5c0/0x5c0 [ 41.371628] ? syscall_return_slowpath+0x30f/0x5c0 [ 41.376548] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 41.381891] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.386712] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.391977] RIP: 0033:0x4418d9 [ 41.395159] RSP: 002b:00007ffc9c513e68 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 41.402929] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418d9 [ 41.410177] RDX: 00000000004418d9 RSI: 0000000000000000 RDI: 0000000000000001 [ 41.417423] RBP: 00000000004a34d8 R08: 0000000001a0c6b0 R09: 00000000006cd018 [ 41.424670] R10: 0000000001a0c6b0 R11: 0000000000000202 R12: 00007ffc9c513f78 [ 41.431916] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 41.439660] Dumping ftrace buffer: [ 41.443184] (ftrace buffer empty) [ 41.446870] Kernel Offset: disabled [ 41.450475] Rebooting in 86400 seconds..