[....] Starting enhanced syslogd: rsyslogd[ 12.746832] audit: type=1400 audit(1516870857.427:5): avc: denied { syslog } for pid=3511 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: [ 17.492862] audit: type=1400 audit(1516870862.173:6): 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 '10.128.0.25' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 39.049483] audit: type=1400 audit(1516870883.730:7): avc: denied { map } for pid=3668 comm="syzkaller034025" path="/root/syzkaller034025560" 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 [ 39.361674] 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 [ 39.746522] kasan: CONFIG_KASAN_INLINE enabled [ 39.751206] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.758734] general protection fault: 0000 [#1] SMP KASAN [ 39.764247] Dumping ftrace buffer: [ 39.767783] (ftrace buffer empty) [ 39.771465] Modules linked in: [ 39.774632] CPU: 0 PID: 3668 Comm: syzkaller034025 Not tainted 4.15.0-rc9+ #208 [ 39.782786] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.792132] RIP: 0010:tun_queue_purge+0x1c1/0x410 [ 39.796942] RSP: 0018:ffff8801c3b77650 EFLAGS: 00010202 [ 39.802284] RAX: 0000000000000010 RBX: ffff8801d9323680 RCX: 0000000000000002 [ 39.809524] RDX: 0000000000000000 RSI: 00000000b2904e41 RDI: ffff8801d9323d4c [ 39.816765] RBP: ffff8801c3b776d0 R08: 1ffff1003876ee09 R09: 000000000000168a [ 39.824006] R10: ffff8801c3b77508 R11: 1ffff1003876efe8 R12: 0000000000000000 [ 39.831256] R13: 00000000ffffffff R14: 0000000000000010 R15: dffffc0000000000 [ 39.838497] FS: 0000000000ec2880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 39.846703] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.852555] CR2: 00000000006d00a8 CR3: 0000000006822004 CR4: 00000000001606f0 [ 39.859799] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.867055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.874295] Call Trace: [ 39.876870] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.881866] ? trace_hardirqs_on+0xd/0x10 [ 39.885989] __tun_detach+0xa58/0x10b0 [ 39.889851] ? tun_cleanup_tx_ring.part.47+0x450/0x450 [ 39.895106] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.900968] ? locks_remove_file+0x3fa/0x5a0 [ 39.905348] ? fcntl_setlk+0x10c0/0x10c0 [ 39.909385] ? fsnotify+0x7b3/0x1140 [ 39.913075] ? fsnotify_first_mark+0x2b0/0x2b0 [ 39.917630] ? __tun_detach+0x10b0/0x10b0 [ 39.921749] ? __tun_detach+0x10b0/0x10b0 [ 39.925866] tun_chr_close+0x44/0x60 [ 39.929563] __fput+0x327/0x7e0 [ 39.932819] ? fput+0x140/0x140 [ 39.936071] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.941936] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.946424] ____fput+0x15/0x20 [ 39.949677] task_work_run+0x199/0x270 [ 39.953536] ? task_work_cancel+0x210/0x210 [ 39.957837] ? _raw_spin_unlock+0x22/0x30 [ 39.961958] ? switch_task_namespaces+0x87/0xc0 [ 39.966602] do_exit+0x9bb/0x1ad0 [ 39.970031] ? __pmd_alloc+0x4e0/0x4e0 [ 39.973894] ? rcu_note_context_switch+0x710/0x710 [ 39.978798] ? mm_update_next_owner+0x930/0x930 [ 39.983439] ? find_held_lock+0x35/0x1d0 [ 39.987476] ? handle_mm_fault+0x248/0x8d0 [ 39.991683] ? find_held_lock+0x35/0x1d0 [ 39.995728] ? __do_page_fault+0x5f7/0xc90 [ 39.999950] ? lock_downgrade+0x980/0x980 [ 40.004074] ? down_read_trylock+0xdb/0x170 [ 40.008366] ? __do_page_fault+0x32d/0xc90 [ 40.012570] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 40.017120] ? vmacache_find+0x5f/0x280 [ 40.021068] ? up_read+0x1a/0x40 [ 40.024407] ? __do_page_fault+0x3d6/0xc90 [ 40.028623] ? get_unused_fd_flags+0x190/0x190 [ 40.033179] ? mm_fault_error+0x2c0/0x2c0 [ 40.037295] ? __fdget+0x18/0x20 [ 40.040638] ? do_page_fault+0xee/0x720 [ 40.044586] ? __do_page_fault+0xc90/0xc90 [ 40.048796] do_group_exit+0x149/0x400 [ 40.052657] ? SyS_exit+0x30/0x30 [ 40.056082] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.061247] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.065980] SyS_exit_group+0x1d/0x20 [ 40.069754] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 40.074480] RIP: 0033:0x443f28 [ 40.077649] RSP: 002b:00007ffcf7986968 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 40.085328] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443f28 [ 40.092567] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 40.099808] RBP: 00000000006d00a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 40.107049] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 40.114289] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 [ 40.121547] 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 [ 40.140633] RIP: tun_queue_purge+0x1c1/0x410 RSP: ffff8801c3b77650 [ 40.147238] ---[ end trace 0e9d56a7ea0fc1d9 ]--- [ 40.151998] Kernel panic - not syncing: Fatal exception [ 40.157742] Dumping ftrace buffer: [ 40.161264] (ftrace buffer empty) [ 40.165042] Kernel Offset: disabled [ 40.168642] Rebooting in 86400 seconds..