[....] Starting enhanced syslogd: rsyslogd[ 13.070511] audit: type=1400 audit(1516971296.340:5): avc: denied { syslog } for pid=3510 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.889145] audit: type=1400 audit(1516971302.158:6): avc: denied { map } for pid=3650 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 '10.128.0.13' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 25.800086] audit: type=1400 audit(1516971309.069:7): avc: denied { map } for pid=3664 comm="syzkaller749424" path="/root/syzkaller749424037" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 26.065295] 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 executing program [ 26.396128] kasan: CONFIG_KASAN_INLINE enabled [ 26.400915] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.408298] general protection fault: 0000 [#1] SMP KASAN [ 26.413825] Dumping ftrace buffer: [ 26.417337] (ftrace buffer empty) [ 26.421023] Modules linked in: [ 26.424191] CPU: 0 PID: 3664 Comm: syzkaller749424 Not tainted 4.15.0-rc9+ #210 [ 26.431609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.440952] RIP: 0010:tun_queue_purge+0x1c1/0x410 [ 26.445774] RSP: 0018:ffff8801d9027650 EFLAGS: 00010202 [ 26.451109] RAX: 0000000000000010 RBX: ffff8801d90a3180 RCX: 0000000000000002 [ 26.458356] RDX: 0000000000000000 RSI: 000000000fe3dcbb RDI: ffff8801d90a384c [ 26.465596] RBP: ffff8801d90276d0 R08: 1ffff1003b204e09 R09: 00000000000016ce [ 26.472838] R10: ffff8801d9027508 R11: 1ffff1003b204fe8 R12: 0000000000000000 [ 26.480090] R13: 00000000ffffffff R14: 0000000000000010 R15: dffffc0000000000 [ 26.487332] FS: 0000000001fc7880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 26.495553] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.501406] CR2: 00000000006d00a8 CR3: 0000000006822001 CR4: 00000000001606f0 [ 26.508649] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.515900] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.523141] Call Trace: [ 26.525716] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.530704] ? trace_hardirqs_on+0xd/0x10 [ 26.534823] __tun_detach+0xa58/0x10b0 [ 26.538685] ? tun_cleanup_tx_ring.part.47+0x450/0x450 [ 26.543945] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.549803] ? locks_remove_file+0x3fa/0x5a0 [ 26.554193] ? fcntl_setlk+0x10c0/0x10c0 [ 26.558224] ? fsnotify+0x7b3/0x1140 [ 26.561915] ? fsnotify_first_mark+0x2b0/0x2b0 [ 26.566477] ? __tun_detach+0x10b0/0x10b0 [ 26.570598] ? __tun_detach+0x10b0/0x10b0 [ 26.574729] tun_chr_close+0x44/0x60 [ 26.578424] __fput+0x327/0x7e0 [ 26.581677] ? fput+0x140/0x140 [ 26.584929] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.590788] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.595259] ____fput+0x15/0x20 [ 26.598512] task_work_run+0x199/0x270 [ 26.602375] ? task_work_cancel+0x210/0x210 [ 26.606667] ? _raw_spin_unlock+0x22/0x30 [ 26.610786] ? switch_task_namespaces+0x87/0xc0 [ 26.615429] do_exit+0x9bb/0x1ad0 [ 26.618853] ? __pmd_alloc+0x4e0/0x4e0 [ 26.622713] ? rcu_note_context_switch+0x710/0x710 [ 26.627615] ? mm_update_next_owner+0x930/0x930 [ 26.632255] ? find_held_lock+0x35/0x1d0 [ 26.636289] ? handle_mm_fault+0x248/0x8d0 [ 26.640497] ? find_held_lock+0x35/0x1d0 [ 26.644533] ? __do_page_fault+0x5f7/0xc90 [ 26.648740] ? lock_downgrade+0x980/0x980 [ 26.652862] ? down_read_trylock+0xdb/0x170 [ 26.657163] ? __do_page_fault+0x32d/0xc90 [ 26.661380] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.665931] ? vmacache_find+0x5f/0x280 [ 26.669889] ? up_read+0x1a/0x40 [ 26.673238] ? __do_page_fault+0x3d6/0xc90 [ 26.677442] ? get_unused_fd_flags+0x190/0x190 [ 26.682093] ? mm_fault_error+0x2c0/0x2c0 [ 26.686219] ? __fdget+0x18/0x20 [ 26.689561] ? do_page_fault+0xee/0x720 [ 26.693515] ? __do_page_fault+0xc90/0xc90 [ 26.697727] do_group_exit+0x149/0x400 [ 26.701585] ? SyS_exit+0x30/0x30 [ 26.705021] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.710010] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.714750] SyS_exit_group+0x1d/0x20 [ 26.718523] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 26.723251] RIP: 0033:0x443d68 [ 26.726510] RSP: 002b:00007ffca9806868 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.734187] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443d68 [ 26.741429] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.748670] RBP: 00000000006d00a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.755909] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 26.763148] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 [ 26.770413] Code: 07 00 00 48 89 45 a0 48 c1 e8 03 42 80 3c 38 00 0f 85 2c 02 00 00 48 8b 83 08 07 00 00 49 63 d4 4c 8d 34 d0 4c 89 f1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 ef 01 00 00 4d 8b 36 48 89 55 b8 48 89 45 [ 26.789481] RIP: tun_queue_purge+0x1c1/0x410 RSP: ffff8801d9027650 [ 26.795840] ---[ end trace 1a4a505a4db9a708 ]--- [ 26.800583] Kernel panic - not syncing: Fatal exception [ 26.806318] Dumping ftrace buffer: [ 26.809847] (ftrace buffer empty) [ 26.813533] Kernel Offset: disabled [ 26.817130] Rebooting in 86400 seconds..