[....] Starting enhanced syslogd: rsyslogd[ 18.368256] audit: type=1400 audit(1517953559.414:5): avc: denied { syslog } for pid=4055 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: [ 24.814892] audit: type=1400 audit(1517953565.861:6): avc: denied { map } for pid=4195 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. executing program executing program [ 43.414339] audit: type=1400 audit(1517953584.461:7): avc: denied { map } for pid=4212 comm="syzkaller882362" path="/root/syzkaller882362861" 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 [ 43.446457] kasan: CONFIG_KASAN_INLINE enabled [ 43.451481] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.458969] general protection fault: 0000 [#1] SMP KASAN [ 43.464482] Dumping ftrace buffer: [ 43.467994] (ftrace buffer empty) [ 43.471676] Modules linked in: [ 43.474844] CPU: 1 PID: 4212 Comm: syzkaller882362 Not tainted 4.15.0+ #299 [ 43.481921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.491258] RIP: 0010:ip6t_do_table+0x132d/0x1a30 [ 43.496071] RSP: 0018:ffff8801db506c20 EFLAGS: 00010246 [ 43.501408] RAX: 0000000000000000 RBX: ffff8801b11f2500 RCX: ffffffff84db92e1 [ 43.508650] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8801b11f265e [ 43.515894] RBP: ffff8801db506e68 R08: ffff8801db506f60 R09: 0000000000000000 [ 43.523139] R10: 00000000000000d0 R11: 0000000000000000 R12: 0000000000000001 [ 43.530383] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801b11f25d0 [ 43.537631] FS: 0000000001bd8880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 43.545840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.551705] CR2: 0000000020809000 CR3: 00000001b090d004 CR4: 00000000001606e0 [ 43.558963] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.566216] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.573456] Call Trace: [ 43.576008] [ 43.578134] ? ip6t_error+0x60/0x60 [ 43.581735] ? ip6t_do_table+0xcca/0x1a30 [ 43.585859] ? ip6t_error+0x60/0x60 [ 43.589457] ? ip6table_mangle_hook+0x117/0x920 [ 43.594097] ? lock_downgrade+0x980/0x980 [ 43.598217] ? check_noncircular+0x20/0x20 [ 43.602420] ? lock_acquire+0x1d5/0x580 [ 43.606450] ? ip6table_mangle_net_exit+0xa0/0xa0 [ 43.611265] ? ip6_input+0x11f/0x560 [ 43.614955] ? lock_release+0xa40/0xa40 [ 43.618901] ip6table_security_hook+0x65/0x80 [ 43.623370] nf_hook_slow+0xba/0x1a0 [ 43.627142] ip6_input+0x35c/0x560 [ 43.630652] ? ip6_input_finish+0x17a0/0x17a0 [ 43.635121] ? find_held_lock+0x35/0x1d0 [ 43.639155] ? ip6_make_skb+0x5e0/0x5e0 [ 43.643098] ? ipv6_rcv+0x16cd/0x1fa0 [ 43.646878] ip6_rcv_finish+0x297/0x8c0 [ 43.650825] ? ip6_input+0x560/0x560 [ 43.654514] ? ip6table_nat_in+0x2c/0x40 [ 43.658548] ? nf_hook_slow+0xd3/0x1a0 [ 43.662411] ipv6_rcv+0xf37/0x1fa0 [ 43.665927] ? ip6_rcv_finish+0x8c0/0x8c0 [ 43.670047] ? receive_buf+0x446/0x2530 [ 43.673993] ? print_irqtrace_events+0x270/0x270 [ 43.678727] ? ip6_input+0x560/0x560 [ 43.683369] ? ip6_rcv_finish+0x8c0/0x8c0 [ 43.687503] __netif_receive_skb_core+0x1a41/0x3460 [ 43.692504] ? nf_ingress+0x9f0/0x9f0 [ 43.696281] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.701446] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.706611] ? update_cfs_rq_load_avg.part.68+0x23d/0x2d0 [ 43.712122] ? attach_entity_load_avg+0x7a0/0x7a0 [ 43.716933] ? __update_load_avg_se.isra.27+0x56a/0x7c0 [ 43.722263] ? __update_load_avg_se.isra.27+0x56a/0x7c0 [ 43.727601] ? __lock_acquire+0x664/0x3e00 [ 43.731805] ? fastpath_timer_check+0x7f5/0xac0 [ 43.736441] ? update_cfs_rq_load_avg.part.68+0x2d0/0x2d0 [ 43.742044] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.747212] ? print_irqtrace_events+0x270/0x270 [ 43.751942] ? check_noncircular+0x20/0x20 [ 43.756256] ? find_held_lock+0x35/0x1d0 [ 43.760290] ? lock_acquire+0x1d5/0x580 [ 43.764232] ? process_backlog+0x45f/0x740 [ 43.768436] ? lock_acquire+0x1d5/0x580 [ 43.772381] ? process_backlog+0x1ab/0x740 [ 43.776591] ? lock_release+0xa40/0xa40 [ 43.780544] ? check_noncircular+0x20/0x20 [ 43.784747] ? do_raw_spin_trylock+0x190/0x190 [ 43.789313] __netif_receive_skb+0x2c/0x1b0 [ 43.793608] ? __netif_receive_skb+0x2c/0x1b0 [ 43.798073] process_backlog+0x203/0x740 [ 43.802107] net_rx_action+0x792/0x1910 [ 43.806057] ? napi_complete_done+0x6c0/0x6c0 [ 43.810607] ? check_noncircular+0x20/0x20 [ 43.814812] ? trace_hardirqs_off+0xd/0x10 [ 43.819018] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 43.824181] ? debug_object_activate+0x307/0x730 [ 43.828908] ? __lock_is_held+0xb6/0x140 [ 43.832939] ? timerqueue_add+0x1e9/0x280 [ 43.837055] ? check_noncircular+0x20/0x20 [ 43.841258] ? enqueue_hrtimer+0x177/0x4b0 [ 43.845458] ? lock_release+0xa40/0xa40 [ 43.849405] ? retrigger_next_event+0x1e0/0x1e0 [ 43.854041] ? __lock_is_held+0xb6/0x140 [ 43.858075] ? find_held_lock+0x35/0x1d0 [ 43.862112] ? clockevents_program_event+0x163/0x2e0 [ 43.867186] ? lock_downgrade+0x980/0x980 [ 43.871310] ? pvclock_read_flags+0x160/0x160 [ 43.875776] ? find_held_lock+0x35/0x1d0 [ 43.879810] ? kvm_clock_get_cycles+0x25/0x30 [ 43.884273] ? ktime_get+0x26f/0x3a0 [ 43.887957] ? ktime_get_resolution_ns+0x300/0x300 [ 43.892863] ? check_noncircular+0x20/0x20 [ 43.897068] ? native_apic_msr_write+0x5c/0x80 [ 43.901623] ? rcu_pm_notify+0xc0/0xc0 [ 43.905593] __do_softirq+0x2d7/0xb85 [ 43.909377] ? task_prio+0x40/0x40 [ 43.912907] ? __irqentry_text_end+0x1f8ec4/0x1f8ec4 [ 43.918337] ? irq_exit+0xbb/0x200 [ 43.921853] ? smp_apic_timer_interrupt+0x16b/0x700 [ 43.926839] ? smp_call_function_single_interrupt+0x640/0x640 [ 43.932693] ? _raw_spin_lock+0x32/0x40 [ 43.936639] ? _raw_spin_unlock+0x22/0x30 [ 43.940939] ? handle_edge_irq+0x2b4/0x7c0 [ 43.945144] ? task_prio+0x40/0x40 [ 43.948658] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.953473] do_softirq_own_stack+0x2a/0x40 [ 43.957768] [ 43.959980] do_softirq.part.19+0x14d/0x190 [ 43.964271] ? ip6_finish_output2+0xb6d/0x23a0 [ 43.968823] __local_bh_enable_ip+0x1ee/0x230 [ 43.973300] ip6_finish_output2+0xba0/0x23a0 [ 43.977685] ? ip6_sk_dst_lookup_flow+0x7f0/0x7f0 [ 43.982510] ? ip6_mtu+0x369/0x4d0 [ 43.986019] ? lock_downgrade+0x980/0x980 [ 43.990146] ? __lock_is_held+0xb6/0x140 [ 43.994189] ? ip6_mtu+0x1c7/0x4d0 [ 43.997710] ? ip6_dst_ifdown+0x3d0/0x3d0 [ 44.002389] ? nf_nat_ipv6_out+0x262/0x570 [ 44.006694] ip6_finish_output+0x698/0xaf0 [ 44.010897] ? ip6_finish_output+0x698/0xaf0 [ 44.015278] ip6_output+0x1eb/0x840 [ 44.018874] ? ip6_finish_output+0xaf0/0xaf0 [ 44.023261] ? ip6_dst_hoplimit+0x26c/0x420 [ 44.027555] ? lock_downgrade+0x980/0x980 [ 44.031675] ? ip6_fragment+0x3470/0x3470 [ 44.035793] ? __lock_is_held+0xb6/0x140 [ 44.039824] ip6_local_out+0x95/0x160 [ 44.043596] ip6_send_skb+0xa1/0x330 [ 44.047279] ? csum_ipv6_magic+0x20/0x80 [ 44.051312] udp_v6_send_skb+0x33a/0xf70 [ 44.055345] udpv6_sendmsg+0x2835/0x3400 [ 44.059375] ? ip_reply_glue_bits+0xb0/0xb0 [ 44.063670] ? udpv6_setsockopt+0x80/0x80 [ 44.067789] ? reacquire_held_locks+0x1f9/0x3e0 [ 44.072427] ? find_held_lock+0x35/0x1d0 [ 44.076463] ? release_sock+0x1d4/0x2a0 [ 44.080412] ? lock_downgrade+0x980/0x980 [ 44.084534] ? __local_bh_enable_ip+0x121/0x230 [ 44.089176] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.094159] ? release_sock+0x1d4/0x2a0 [ 44.098101] ? trace_hardirqs_on+0xd/0x10 [ 44.102217] ? __local_bh_enable_ip+0x121/0x230 [ 44.106860] ? _raw_spin_unlock_bh+0x30/0x40 [ 44.111236] ? release_sock+0x1d4/0x2a0 [ 44.115186] ? udp_v6_get_port+0x355/0x600 [ 44.119399] inet_sendmsg+0x11f/0x5e0 [ 44.123174] ? inet_sendmsg+0x11f/0x5e0 [ 44.127119] ? __might_sleep+0x95/0x190 [ 44.131070] ? inet_create+0xf50/0xf50 [ 44.134932] ? selinux_socket_sendmsg+0x36/0x40 [ 44.139569] ? security_socket_sendmsg+0x89/0xb0 [ 44.144296] ? inet_create+0xf50/0xf50 [ 44.148167] sock_sendmsg+0xca/0x110 [ 44.151856] SYSC_sendto+0x361/0x5c0 [ 44.155543] ? SYSC_connect+0x4a0/0x4a0 [ 44.159502] ? __do_page_fault+0x5f7/0xc90 [ 44.163710] ? lock_downgrade+0x980/0x980 [ 44.167844] ? __do_page_fault+0x3d6/0xc90 [ 44.172054] ? mm_fault_error+0x2c0/0x2c0 [ 44.176173] ? move_addr_to_kernel+0x60/0x60 [ 44.180554] SyS_sendto+0x40/0x50 [ 44.183993] ? SyS_getpeername+0x30/0x30 [ 44.188048] do_syscall_64+0x282/0x940 [ 44.191910] ? __do_page_fault+0xc90/0xc90 [ 44.196116] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.200842] ? syscall_return_slowpath+0x550/0x550 [ 44.205741] ? syscall_return_slowpath+0x2ac/0x550 [ 44.210639] ? prepare_exit_to_usermode+0x350/0x350 [ 44.215634] ? retint_user+0x18/0x18 [ 44.219325] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.224575] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 44.229823] RIP: 0033:0x441329 [ 44.232990] RSP: 002b:00007ffc9b4da0d8 EFLAGS: 00000203 ORIG_RAX: 000000000000002c [ 44.240755] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000441329 [ 44.248085] RDX: 0000000000000000 RSI: 0000000020adb000 RDI: 0000000000000005 [ 44.255338] RBP: 0100000000000000 R08: 0000000020809000 R09: 000000000000001c [ 44.262581] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000402c50 [ 44.269824] R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 [ 44.277086] Code: 41 f6 87 83 00 00 00 04 75 37 e8 cf 13 95 fc 8b 85 14 fe ff ff 48 8b b5 50 fe ff ff 4c 8d 2c c6 44 8d 60 01 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 26 03 00 00 4d 89 7d 00 44 89 a5 14 fe ff [ 44.296177] RIP: ip6t_do_table+0x132d/0x1a30 RSP: ffff8801db506c20 [ 44.302513] ---[ end trace 9e12d7ce3158bdd0 ]--- [ 44.307262] Kernel panic - not syncing: Fatal exception in interrupt [ 44.314328] Dumping ftrace buffer: [ 44.317845] (ftrace buffer empty) [ 44.321530] Kernel Offset: disabled [ 44.325133] Rebooting in 86400 seconds..