[....] Starting enhanced syslogd: rsyslogd[ 17.701498] audit: type=1400 audit(1520539285.266:5): avc: denied { syslog } for pid=4090 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.906295] audit: type=1400 audit(1520539290.470:6): avc: denied { map } for pid=4229 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. executing program [ 29.252702] audit: type=1400 audit(1520539296.817:7): avc: denied { map } for pid=4243 comm="syzkaller462325" path="/root/syzkaller462325528" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 29.282304] kasan: CONFIG_KASAN_INLINE enabled [ 29.287044] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.294452] general protection fault: 0000 [#1] SMP KASAN [ 29.299968] Dumping ftrace buffer: [ 29.303481] (ftrace buffer empty) [ 29.307166] Modules linked in: [ 29.310333] CPU: 1 PID: 4243 Comm: syzkaller462325 Not tainted 4.16.0-rc4+ #346 [ 29.317752] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.327094] RIP: 0010:lowpan_device_event+0xca/0x130 [ 29.332168] RSP: 0018:ffff8801b1a7f010 EFLAGS: 00010206 [ 29.337503] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85aedf10 [ 29.344766] RDX: 0000000000000006 RSI: 0000000000000006 RDI: 0000000000000030 [ 29.352027] RBP: ffff8801b1a7f028 R08: 0000000000000000 R09: 1ffff1003634fdd0 [ 29.359275] R10: ffff8801b1a7f038 R11: 0000000000000001 R12: 0000000000000006 [ 29.366520] R13: 0000000000000000 R14: ffffffff876992e0 R15: ffffffff87687d60 [ 29.373766] FS: 000000000236f880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 29.381966] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.387821] CR2: 00007ffd59cfafac CR3: 0000000006e22002 CR4: 00000000001606e0 [ 29.395069] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.402312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.409555] Call Trace: [ 29.412143] notifier_call_chain+0x136/0x2c0 [ 29.416532] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 29.421965] ? generic_xdp_install+0x4d0/0x4d0 [ 29.426523] ? dev_init_scheduler+0x530/0x530 [ 29.430989] ? rtnl_is_locked+0x54/0xb0 [ 29.434934] ? rtnl_kfree_skbs+0x70/0x70 [ 29.438970] raw_notifier_call_chain+0x2d/0x40 [ 29.443525] call_netdevice_notifiers_info+0x32/0x70 [ 29.448600] rollback_registered_many+0x8b5/0xe20 [ 29.453425] ? dev_xdp_uninstall+0x310/0x310 [ 29.457810] ? __lock_acquire+0x664/0x3e00 [ 29.462018] ? lock_acquire+0x1d5/0x580 [ 29.465963] ? trace_hardirqs_off+0x10/0x10 [ 29.470286] ? print_irqtrace_events+0x270/0x270 [ 29.475017] ? print_irqtrace_events+0x270/0x270 [ 29.479767] ? print_irqtrace_events+0x270/0x270 [ 29.484500] rollback_registered+0x1be/0x3c0 [ 29.488885] ? rollback_registered_many+0xe20/0xe20 [ 29.493877] ? __queue_delayed_work+0x226/0x340 [ 29.498519] ? mark_held_locks+0xaf/0x100 [ 29.502639] ? queue_delayed_work_on+0xc9/0x1d0 [ 29.507281] ? rtnl_is_locked+0x54/0xb0 [ 29.511227] ? trace_hardirqs_on+0xd/0x10 [ 29.515365] ? queue_delayed_work_on+0x10d/0x1d0 [ 29.520130] unregister_netdevice_queue+0x2e3/0x5f0 [ 29.525121] ? rollback_registered+0x3c0/0x3c0 [ 29.529673] ? linkwatch_schedule_work+0x130/0x130 [ 29.534576] ? tun_ptr_free+0x3d0/0x3d0 [ 29.538521] ? mark_held_locks+0xaf/0x100 [ 29.542644] ? __lock_is_held+0xb6/0x140 [ 29.546679] ? __local_bh_enable_ip+0x121/0x230 [ 29.551323] ? __tun_detach+0xa4c/0x10b0 [ 29.555354] ? trace_hardirqs_on+0xd/0x10 [ 29.559475] __tun_detach+0x520/0x10b0 [ 29.563339] ? tun_cleanup_tx_ring.part.46+0x550/0x550 [ 29.568585] ? trace_hardirqs_off+0x10/0x10 [ 29.572884] ? locks_remove_file+0x3fa/0x5a0 [ 29.577271] ? fcntl_setlk+0x1100/0x1100 [ 29.581306] ? fsnotify+0x7b3/0x1140 [ 29.585001] ? __tun_detach+0x10b0/0x10b0 [ 29.589119] ? __tun_detach+0x10b0/0x10b0 [ 29.593240] tun_chr_close+0x44/0x60 [ 29.596942] __fput+0x327/0x7e0 [ 29.600193] ? fput+0x140/0x140 [ 29.603445] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.607930] ____fput+0x15/0x20 [ 29.611196] task_work_run+0x199/0x270 [ 29.615054] ? task_work_cancel+0x210/0x210 [ 29.619346] ? _raw_spin_unlock+0x22/0x30 [ 29.623556] ? switch_task_namespaces+0x87/0xc0 [ 29.628208] do_exit+0x9bb/0x1ad0 [ 29.631638] ? __tun_chr_ioctl+0x511/0x40d0 [ 29.635932] ? mm_update_next_owner+0x930/0x930 [ 29.640574] ? avc_has_extended_perms+0x7fa/0x12c0 [ 29.645476] ? tun_poll_controller+0x4c0/0x4c0 [ 29.650031] ? avc_ss_reset+0x110/0x110 [ 29.653990] ? save_stack+0xa3/0xd0 [ 29.657593] ? save_stack+0x43/0xd0 [ 29.661200] ? __kasan_slab_free+0x11a/0x170 [ 29.665585] ? kasan_slab_free+0xe/0x10 [ 29.669532] ? kmem_cache_free+0x83/0x2a0 [ 29.673649] ? putname+0xee/0x130 [ 29.677082] ? do_sys_open+0x31b/0x6d0 [ 29.680958] ? SyS_open+0x2d/0x40 [ 29.684401] ? _raw_spin_unlock_irqrestore+0xa6/0xc0 [ 29.689495] ? debug_check_no_obj_freed+0x3da/0xf1f [ 29.694486] ? __lock_is_held+0xb6/0x140 [ 29.698530] ? rcu_note_context_switch+0x710/0x710 [ 29.703433] ? tun_chr_compat_ioctl+0x30/0x30 [ 29.707900] ? tun_chr_ioctl+0x2a/0x40 [ 29.711774] ? tun_chr_ioctl+0x2a/0x40 [ 29.715637] ? do_vfs_ioctl+0x486/0x1520 [ 29.719684] ? ioctl_preallocate+0x2b0/0x2b0 [ 29.724070] ? selinux_capable+0x40/0x40 [ 29.728120] ? kmem_cache_free+0x258/0x2a0 [ 29.732338] ? putname+0xf3/0x130 [ 29.735768] do_group_exit+0x149/0x400 [ 29.739632] ? SyS_exit+0x30/0x30 [ 29.743059] ? security_file_ioctl+0x7d/0xb0 [ 29.747439] ? security_file_ioctl+0x89/0xb0 [ 29.751823] ? do_syscall_64+0xb7/0x940 [ 29.755766] ? do_group_exit+0x400/0x400 [ 29.759799] SyS_exit_group+0x1d/0x20 [ 29.763570] do_syscall_64+0x281/0x940 [ 29.767434] ? __do_page_fault+0xc90/0xc90 [ 29.771643] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.776372] ? syscall_return_slowpath+0x550/0x550 [ 29.781275] ? syscall_return_slowpath+0x2ac/0x550 [ 29.786178] ? prepare_exit_to_usermode+0x350/0x350 [ 29.791181] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.796526] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.801354] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.806518] RIP: 0033:0x4429e8 [ 29.809679] RSP: 002b:00007ffd2080c1e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.817360] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004429e8 [ 29.824603] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 29.831859] RBP: 00000000004c2628 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 29.839102] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 29.846349] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000 [ 29.853601] Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 59 48 8b 9b 50 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 30 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 3e 48 8b 5b 30 41 bd 01 00 00 00 48 85 db 74 92 [ 29.872700] RIP: lowpan_device_event+0xca/0x130 RSP: ffff8801b1a7f010 [ 29.879341] ---[ end trace e3070a3c583080d7 ]--- [ 29.884094] Kernel panic - not syncing: Fatal exception [ 29.889811] Dumping ftrace buffer: [ 29.893329] (ftrace buffer empty) [ 29.897016] Kernel Offset: disabled [ 29.900617] Rebooting in 86400 seconds..