[....] Starting enhanced syslogd: rsyslogd[ 17.080773] audit: type=1400 audit(1518227521.812:5): avc: denied { syslog } for pid=4018 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: [ 22.460609] audit: type=1400 audit(1518227527.192:6): avc: denied { map } for pid=4159 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 '10.128.15.192' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.799343] audit: type=1400 audit(1518227533.531:7): avc: denied { map } for pid=4173 comm="syzkaller277820" path="/root/syzkaller277820981" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.151430] TRACE: raw:OUTPUT:rule:2 IN= OUT=eth0 SRC=fe80:0000:0000:0000:4001:0aff:fe80:0fc0 DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=56 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=ICMPv6 TYPE=133 CODE=0 [ 29.169846] ------------[ cut here ]------------ [ 29.174637] kernel BUG at kernel/time/timer.c:958! [ 29.179622] invalid opcode: 0000 [#1] SMP KASAN [ 29.184272] Dumping ftrace buffer: [ 29.187788] (ftrace buffer empty) [ 29.191476] Modules linked in: [ 29.194652] CPU: 1 PID: 4171 Comm: sshd Not tainted 4.15.0+ #221 [ 29.200774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.210121] RIP: 0010:mod_timer+0x839/0x1340 [ 29.214510] RSP: 0018:ffff8801db506e68 EFLAGS: 00010206 [ 29.219853] RAX: ffff8801b7e64000 RBX: ffff8801af5c1490 RCX: ffffffff81604e09 [ 29.227107] RDX: 0000000000000100 RSI: 00000000fffbde91 RDI: ffff8801af5c14a8 [ 29.234357] RBP: ffff8801db507108 R08: 0000000000000000 R09: 1ffff1003b6a0dfa [ 29.241607] R10: ffff8801db506f98 R11: 0000000000000005 R12: dffffc0000000000 [ 29.248859] R13: ffff8801db5070e0 R14: ffff8801db507140 R15: ffff8801b1e2dcd0 [ 29.256110] FS: 00007f750227a7c0(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 29.264315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.270175] CR2: 00005603dcb9a0b8 CR3: 00000001cef1f001 CR4: 00000000001606e0 [ 29.277428] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.284680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.291927] Call Trace: [ 29.294487] [ 29.296626] ? check_noncircular+0x20/0x20 [ 29.300844] ? msleep_interruptible+0x150/0x150 [ 29.305493] ? nf_log_buf_close+0x95/0xe0 [ 29.309625] ? find_held_lock+0x35/0x1d0 [ 29.313673] ? led_trigger_event+0xac/0xd0 [ 29.317886] ? lock_downgrade+0x980/0x980 [ 29.322013] ? nf_log_unbind_pf+0x140/0x140 [ 29.326316] ? lock_release+0xa40/0xa40 [ 29.330284] ? _raw_read_unlock+0x22/0x30 [ 29.334413] ? led_trigger_event+0xb1/0xd0 [ 29.338629] led_tg+0x1db/0x2e0 [ 29.341888] ? led_timeout_callback+0x20/0x20 [ 29.346366] ? unwind_get_return_address+0x61/0xa0 [ 29.351293] ip6t_do_table+0xc2a/0x1a30 [ 29.355254] ? register_lock_class+0x1f18/0x2820 [ 29.360027] ? ip6t_error+0x60/0x60 [ 29.363635] ? sock_sendmsg+0xca/0x110 [ 29.367505] ? check_noncircular+0x20/0x20 [ 29.371733] ? lock_acquire+0x1d5/0x580 [ 29.375685] ? lock_acquire+0x1d5/0x580 [ 29.379659] ? pndisc_destructor+0x340/0x340 [ 29.384049] ? lock_release+0xa40/0xa40 [ 29.388010] ip6table_raw_hook+0x65/0x80 [ 29.392056] nf_hook_slow+0xba/0x1a0 [ 29.395753] nf_hook.constprop.27+0x3f6/0x830 [ 29.400232] ? pndisc_destructor+0x340/0x340 [ 29.404619] ? find_held_lock+0x35/0x1d0 [ 29.408663] ? lock_acquire+0x1d5/0x580 [ 29.412616] ? lock_acquire+0x1d5/0x580 [ 29.416569] ? ndisc_send_skb+0x826/0x1370 [ 29.420786] ? lock_downgrade+0x980/0x980 [ 29.424938] ? lock_release+0xa40/0xa40 [ 29.428895] ? ndisc_error_report+0x180/0x180 [ 29.433379] ndisc_send_skb+0xa51/0x1370 [ 29.437510] ? nf_hook.constprop.27+0x830/0x830 [ 29.442159] ? refcount_add_not_zero+0x133/0x200 [ 29.446897] ? refcount_dec_if_one+0x20/0x20 [ 29.451304] ndisc_send_rs+0x126/0x670 [ 29.455177] addrconf_rs_timer+0x363/0x6b0 [ 29.459392] ? ipv6_get_lladdr+0x500/0x500 [ 29.463616] call_timer_fn+0x228/0x820 [ 29.467483] ? call_timer_fn+0x228/0x820 [ 29.471522] ? ipv6_get_lladdr+0x500/0x500 [ 29.475736] ? process_timeout+0x40/0x40 [ 29.479779] ? __run_timers+0x7e3/0xb70 [ 29.483732] ? lock_downgrade+0x980/0x980 [ 29.487860] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 29.492943] ? debug_object_deactivate+0x364/0x560 [ 29.497861] ? mark_held_locks+0xaf/0x100 [ 29.501989] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 29.506984] ? ipv6_get_lladdr+0x500/0x500 [ 29.511195] ? ipv6_get_lladdr+0x500/0x500 [ 29.515410] __run_timers+0x7ee/0xb70 [ 29.519196] ? trigger_dyntick_cpu.isra.29+0x160/0x160 [ 29.524454] ? lock_downgrade+0x980/0x980 [ 29.528590] ? pvclock_read_flags+0x160/0x160 [ 29.533066] ? find_held_lock+0x35/0x1d0 [ 29.537108] ? print_irqtrace_events+0x270/0x270 [ 29.541843] ? ktime_get+0x26f/0x3a0 [ 29.545554] ? check_noncircular+0x20/0x20 [ 29.549770] ? ktime_get_resolution_ns+0x300/0x300 [ 29.554686] ? __lock_is_held+0xb6/0x140 [ 29.558733] run_timer_softirq+0x4c/0x70 [ 29.562773] __do_softirq+0x2d7/0xb85 [ 29.566552] ? task_prio+0x40/0x40 [ 29.570079] ? __irqentry_text_end+0x1f8d44/0x1f8d44 [ 29.575162] ? irq_exit+0xbb/0x200 [ 29.578679] ? smp_apic_timer_interrupt+0x16b/0x700 [ 29.583672] ? smp_reschedule_interrupt+0xe6/0x670 [ 29.588581] ? smp_call_function_single_interrupt+0x640/0x640 [ 29.594442] ? _raw_spin_lock+0x32/0x40 [ 29.598396] ? _raw_spin_unlock+0x22/0x30 [ 29.602522] ? handle_edge_irq+0x2b4/0x7c0 [ 29.606734] ? task_prio+0x40/0x40 [ 29.610265] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.615096] do_softirq_own_stack+0x2a/0x40 [ 29.619394] [ 29.621622] do_softirq.part.19+0x14d/0x190 [ 29.625926] ? ip_finish_output2+0x92f/0x1550 [ 29.630400] __local_bh_enable_ip+0x1ee/0x230 [ 29.634876] ip_finish_output2+0x962/0x1550 [ 29.639180] ? ip_copy_metadata+0xac0/0xac0 [ 29.643481] ? __lock_acquire+0x664/0x3e00 [ 29.647695] ? check_noncircular+0x20/0x20 [ 29.651917] ? ipv4_mtu+0x347/0x4c0 [ 29.655527] ? __lock_is_held+0xb6/0x140 [ 29.659578] ip_finish_output+0x864/0xd10 [ 29.663703] ? ip_finish_output+0x864/0xd10 [ 29.668007] ? ip_fragment.constprop.47+0x200/0x200 [ 29.673012] ? iptable_mangle_hook+0xaf/0x4a0 [ 29.677494] ? nf_hook_slow+0xd3/0x1a0 [ 29.681365] ip_output+0x1d2/0x860 [ 29.684887] ? ip_mc_output+0x1350/0x1350 [ 29.689107] ? ip_fragment.constprop.47+0x200/0x200 [ 29.694108] ip_local_out+0x95/0x160 [ 29.697807] ip_queue_xmit+0x8c0/0x18e0 [ 29.701766] ? ip_build_and_send_pkt+0xc30/0xc30 [ 29.706507] ? refcount_dec_if_one+0x20/0x20 [ 29.710899] ? __tcp_v4_send_check+0x1be/0x360 [ 29.715460] ? tcp_options_write+0x228/0x940 [ 29.719856] tcp_transmit_skb+0x1b12/0x38b0 [ 29.724167] ? bictcp_cong_avoid+0xf20/0xf20 [ 29.728555] ? __tcp_select_window+0x900/0x900 [ 29.733118] ? __kernel_text_address+0xd/0x40 [ 29.737596] ? __lock_acquire+0x664/0x3e00 [ 29.741815] ? depot_save_stack+0x12c/0x490 [ 29.746121] ? tcp_small_queue_check.isra.26+0x31d/0x450 [ 29.751550] ? tcp_tso_segs+0x240/0x240 [ 29.755506] ? pvclock_read_flags+0x160/0x160 [ 29.759978] ? inet_sendmsg+0x11f/0x5e0 [ 29.763930] ? sock_sendmsg+0xca/0x110 [ 29.767791] ? sock_write_iter+0x31a/0x5d0 [ 29.772005] ? __vfs_write+0x684/0x970 [ 29.775868] ? vfs_write+0x189/0x510 [ 29.779561] ? SyS_write+0xef/0x220 [ 29.783168] ? entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.788082] ? sched_clock_cpu+0x1b/0x170 [ 29.792235] ? tcp_init_tso_segs+0x11a/0x200 [ 29.796626] tcp_write_xmit+0x68e/0x5290 [ 29.800683] ? tcp_transmit_skb+0x38b0/0x38b0 [ 29.805156] ? __bfs+0x750/0x750 [ 29.808511] ? find_held_lock+0x35/0x1d0 [ 29.812561] ? __might_fault+0x110/0x1d0 [ 29.816607] ? iov_iter_advance+0x2a1/0x13f0 [ 29.820997] ? lock_release+0xa40/0xa40 [ 29.824952] ? tcp_v4_md5_lookup+0x22/0x30 [ 29.829167] ? tcp_established_options+0x2c5/0x420 [ 29.834078] ? iov_iter_copy_from_user_atomic+0xe30/0xe30 [ 29.839597] __tcp_push_pending_frames+0xa0/0x250 [ 29.844423] tcp_push+0x547/0x780 [ 29.847860] ? tcp_splice_data_recv+0x1a0/0x1a0 [ 29.852511] ? skb_entail+0x5ed/0x8a0 [ 29.856292] ? iov_iter_advance+0x13f0/0x13f0 [ 29.860771] ? tcp_tx_timestamp+0x62/0x2a0 [ 29.864987] tcp_sendmsg_locked+0x289a/0x3c70 [ 29.869482] ? tcp_sendpage+0x60/0x60 [ 29.873357] ? lock_downgrade+0x980/0x980 [ 29.877490] ? print_irqtrace_events+0x270/0x270 [ 29.882222] ? find_held_lock+0x35/0x1d0 [ 29.886271] ? lock_sock_nested+0xa3/0x110 [ 29.890485] ? lock_acquire+0x1d5/0x580 [ 29.894440] ? tcp_sendmsg+0x21/0x50 [ 29.898140] ? mark_held_locks+0xaf/0x100 [ 29.902279] ? do_raw_spin_trylock+0x190/0x190 [ 29.906848] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.911848] ? lock_sock_nested+0x91/0x110 [ 29.916060] ? trace_hardirqs_on+0xd/0x10 [ 29.920185] ? __local_bh_enable_ip+0x121/0x230 [ 29.924844] tcp_sendmsg+0x2f/0x50 [ 29.928367] inet_sendmsg+0x11f/0x5e0 [ 29.932240] ? inet_create+0xf50/0xf50 [ 29.936108] ? selinux_socket_sendmsg+0x36/0x40 [ 29.940759] ? security_socket_sendmsg+0x89/0xb0 [ 29.945522] ? inet_create+0xf50/0xf50 [ 29.949391] sock_sendmsg+0xca/0x110 [ 29.953086] sock_write_iter+0x31a/0x5d0 [ 29.957127] ? sock_sendmsg+0x110/0x110 [ 29.961090] ? iov_iter_init+0xaf/0x1d0 [ 29.965044] __vfs_write+0x684/0x970 [ 29.968747] ? kernel_read+0x120/0x120 [ 29.972623] ? bpf_fd_pass+0x280/0x280 [ 29.976497] ? _cond_resched+0x14/0x30 [ 29.980365] ? selinux_file_permission+0x82/0x460 [ 29.985195] ? rw_verify_area+0xe5/0x2b0 [ 29.989233] ? __fdget_raw+0x20/0x20 [ 29.992925] vfs_write+0x189/0x510 [ 29.996446] SyS_write+0xef/0x220 [ 29.999880] ? SyS_read+0x220/0x220 [ 30.003488] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.008485] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.013225] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 30.017956] RIP: 0033:0x7f7500615370 [ 30.021645] RSP: 002b:00007ffd6b9e7658 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.029332] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7500615370 [ 30.036581] RDX: 0000000000000038 RSI: 000055f5b1840460 RDI: 0000000000000003 [ 30.043835] RBP: 000055f5b142ac88 R08: 0000000000000001 R09: 0101010101010101 [ 30.051084] R10: 0000000000000008 R11: 0000000000000246 R12: 000055f5b183ed30 [ 30.058336] R13: 000055f5b1428fb4 R14: 0000000000000028 R15: 000055f5b142aca0 [ 30.065597] Code: 8b 37 4d 85 f6 75 a1 4c 8b bd 68 fd ff ff 4c 8b b5 60 fd ff ff e8 b8 57 10 00 65 ff 0d 51 9f a1 7e e9 de fc ff ff e8 a7 57 10 00 <0f> 0b e8 a0 57 10 00 e9 28 fb ff ff e8 96 57 10 00 4c 89 bd 70 [ 30.084726] RIP: mod_timer+0x839/0x1340 RSP: ffff8801db506e68 [ 30.090629] ---[ end trace bbe7135b7f654ebb ]--- [ 30.095382] Kernel panic - not syncing: Fatal exception in interrupt [ 30.102334] Dumping ftrace buffer: [ 30.105860] (ftrace buffer empty) [ 30.109541] Kernel Offset: disabled [ 30.113138] Rebooting in 86400 seconds..