[....] Starting enhanced syslogd: rsyslogd[ 16.665441] audit: type=1400 audit(1519158530.044:5): avc: denied { syslog } for pid=4021 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: [ 22.608012] audit: type=1400 audit(1519158535.986:6): avc: denied { map } for pid=4162 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 '10.128.0.56' (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 executing program executing program executing program executing program executing program [ 28.893924] audit: type=1400 audit(1519158542.272:7): avc: denied { map } for pid=4176 comm="syzkaller546481" path="/root/syzkaller546481045" 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 [ 28.919970] kasan: CONFIG_KASAN_INLINE enabled [ 28.924658] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.932040] general protection fault: 0000 [#1] SMP KASAN [ 28.937552] Dumping ftrace buffer: [ 28.941066] (ftrace buffer empty) [ 28.944748] Modules linked in: [ 28.947917] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 4.16.0-rc2+ #322 [ 28.954813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.964148] RIP: 0010:ipt_do_table+0x12ee/0x1950 [ 28.968873] RSP: 0018:ffff8801d9f56200 EFLAGS: 00010246 [ 28.974211] RAX: 0000000000000000 RBX: ffff8801b0082288 RCX: ffffffff84b795fd [ 28.981456] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8801b008209a [ 28.988698] RBP: ffff8801d9f56408 R08: ffff8801d9f56500 R09: 0000000000000000 [ 28.995939] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.003181] R13: dffffc0000000000 R14: ffff8801b0082040 R15: ffff8801d9f56380 [ 29.010426] FS: 0000000000000000(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 29.018626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.024489] CR2: 000055c2a9f900b8 CR3: 0000000006a22006 CR4: 00000000001606e0 [ 29.031738] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.038983] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.046227] Call Trace: [ 29.048793] ? unwind_next_frame.part.6+0x1a6/0xb40 [ 29.053784] ? unwind_dump+0x4d0/0x4d0 [ 29.057661] ? do_add_counters+0x550/0x550 [ 29.061871] ? do_add_counters+0x550/0x550 [ 29.066081] ? check_noncircular+0x20/0x20 [ 29.070287] ? lock_acquire+0x1d5/0x580 [ 29.074237] ? ip_local_deliver+0x212/0x6e0 [ 29.078543] ? iptable_mangle_hook+0xaf/0x4a0 [ 29.083017] iptable_filter_hook+0x65/0x80 [ 29.087227] nf_hook_slow+0xba/0x1a0 [ 29.090919] ip_local_deliver+0x445/0x6e0 [ 29.095041] ? ip_call_ra_chain+0x6d0/0x6d0 [ 29.099337] ? rcu_read_lock_held+0xa9/0xc0 [ 29.103635] ? tcp_v4_early_demux+0x95/0xb80 [ 29.108022] ? ip_rcv_finish+0x2040/0x2040 [ 29.112237] ip_rcv_finish+0xa36/0x2040 [ 29.116185] ? tcp_v4_send_synack+0x430/0x430 [ 29.120657] ? inet_del_offload+0x40/0x40 [ 29.124782] ? ip_rcv+0xf22/0x1840 [ 29.128301] ? lock_downgrade+0x980/0x980 [ 29.132424] ? tcp_v4_send_synack+0x430/0x430 [ 29.136897] ? nf_nat_ipv4_in+0x1cd/0x270 [ 29.141027] ? iptable_nat_ipv4_fn+0x40/0x40 [ 29.145415] ? nf_hook_slow+0xd3/0x1a0 [ 29.149280] ip_rcv+0xc5a/0x1840 [ 29.152624] ? ip_local_deliver+0x6e0/0x6e0 [ 29.156928] ? packet_rcv_spkt+0x11c/0x660 [ 29.161141] ? inet_del_offload+0x40/0x40 [ 29.165264] ? ip_local_deliver+0x6e0/0x6e0 [ 29.169562] __netif_receive_skb_core+0x1a41/0x3460 [ 29.174560] ? nf_ingress+0x9f0/0x9f0 [ 29.178346] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.183513] ? virtnet_set_rx_mode+0x9f0/0x9f0 [ 29.188071] ? trace_event_raw_event_lock_acquire+0x320/0x440 [ 29.193938] ? check_noncircular+0x20/0x20 [ 29.198150] ? check_noncircular+0x20/0x20 [ 29.202358] ? attach_entity_load_avg+0x5ab/0x7a0 [ 29.207176] ? nohz_balance_exit_idle.part.96+0x70/0x70 [ 29.212525] ? find_held_lock+0x35/0x1d0 [ 29.216568] ? lock_downgrade+0x980/0x980 [ 29.220697] ? pvclock_read_flags+0x160/0x160 [ 29.225173] ? lock_acquire+0x1d5/0x580 [ 29.229120] ? lock_acquire+0x1d5/0x580 [ 29.233067] ? netif_receive_skb_internal+0xa2/0x670 [ 29.238146] ? ktime_get_with_offset+0x2c1/0x420 [ 29.242879] ? lock_release+0xa40/0xa40 [ 29.246827] ? do_gettimeofday+0x190/0x190 [ 29.251042] __netif_receive_skb+0x2c/0x1b0 [ 29.255334] ? __netif_receive_skb+0x2c/0x1b0 [ 29.259803] netif_receive_skb_internal+0x10b/0x670 [ 29.264792] ? dev_cpu_dead+0xb00/0xb00 [ 29.268745] ? net_rx_action+0x1910/0x1910 [ 29.272956] ? rcu_pm_notify+0xc0/0xc0 [ 29.276822] ? skb_gro_reset_offset+0x17b/0x300 [ 29.281465] napi_gro_receive+0x3d0/0x500 [ 29.285588] ? dev_gro_receive+0x2110/0x2110 [ 29.289972] ? eth_type_trans+0x2b2/0x710 [ 29.294097] ? eth_gro_receive+0x820/0x820 [ 29.298306] ? print_irqtrace_events+0x270/0x270 [ 29.303033] ? print_irqtrace_events+0x270/0x270 [ 29.307765] receive_buf+0xb6e/0x2530 [ 29.311539] ? check_noncircular+0x20/0x20 [ 29.315748] ? find_held_lock+0x35/0x1d0 [ 29.319788] ? receive_mergeable+0x2a30/0x2a30 [ 29.324344] ? cpuacct_charge+0x2e6/0x5c0 [ 29.328471] ? find_held_lock+0x35/0x1d0 [ 29.332510] ? check_noncircular+0x20/0x20 [ 29.336717] ? lock_downgrade+0x980/0x980 [ 29.340841] ? lock_release+0xa40/0xa40 [ 29.344878] ? __lock_is_held+0xb6/0x140 [ 29.348917] ? __lock_is_held+0xb6/0x140 [ 29.352958] ? update_load_avg+0x249/0x2d80 [ 29.357257] ? find_held_lock+0x1d0/0x1d0 [ 29.361381] ? update_cfs_rq_load_avg.part.68+0x2d0/0x2d0 [ 29.366890] ? reweight_entity+0x11b0/0x11b0 [ 29.371275] ? __lock_is_held+0xb6/0x140 [ 29.375313] ? vring_use_dma_api+0x7f/0xa0 [ 29.379520] ? vring_unmap_one+0x49/0x3d0 [ 29.383644] ? detach_buf+0x463/0x6a0 [ 29.387421] ? __lock_acquire+0x664/0x3e00 [ 29.391635] ? virtqueue_get_buf_ctx+0x3b1/0x8b0 [ 29.396366] ? detach_buf+0x6a0/0x6a0 [ 29.400138] ? virtqueue_enable_cb_prepare+0xc2/0x1f0 [ 29.405303] ? virtqueue_poll+0x46/0xd0 [ 29.409255] virtnet_poll+0x320/0xb70 [ 29.413035] ? receive_buf+0x2530/0x2530 [ 29.417077] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.422244] ? net_rx_action+0x49b/0x1910 [ 29.426370] net_rx_action+0x792/0x1910 [ 29.430328] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.435496] ? napi_complete_done+0x6c0/0x6c0 [ 29.439977] ? __lock_is_held+0xb6/0x140 [ 29.444018] ? select_task_rq_fair+0x2910/0x2910 [ 29.448757] ? find_held_lock+0x35/0x1d0 [ 29.452795] ? finish_task_switch+0x1c0/0x860 [ 29.457262] ? lock_downgrade+0x980/0x980 [ 29.461386] ? lock_release+0xa40/0xa40 [ 29.465333] ? trace_hardirqs_off+0xd/0x10 [ 29.469540] ? do_raw_spin_trylock+0x190/0x190 [ 29.474101] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.478572] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.483565] ? trace_hardirqs_on+0xd/0x10 [ 29.487687] ? mmdrop+0x18/0x30 [ 29.490943] ? finish_task_switch+0x279/0x860 [ 29.495417] ? copy_overflow+0x20/0x20 [ 29.499288] ? __schedule+0x90d/0x2070 [ 29.503158] ? rcu_pm_notify+0xc0/0xc0 [ 29.507028] __do_softirq+0x2d7/0xb85 [ 29.510809] ? __irqentry_text_end+0x1f8ad4/0x1f8ad4 [ 29.515884] ? smpboot_thread_fn+0x65f/0x7c0 [ 29.520268] ? schedule+0xf5/0x430 [ 29.523784] ? __schedule+0x2070/0x2070 [ 29.527736] ? rcu_note_context_switch+0x710/0x710 [ 29.532640] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 29.538499] ? schedule+0xf5/0x430 [ 29.542013] ? run_ksoftirqd+0x8b/0x100 [ 29.545967] ? takeover_tasklets+0xa40/0xa40 [ 29.550350] run_ksoftirqd+0x86/0x100 [ 29.554125] smpboot_thread_fn+0x450/0x7c0 [ 29.558336] ? sort_range+0x30/0x30 [ 29.561941] ? __kthread_parkme+0xcf/0x240 [ 29.566149] ? __kthread_parkme+0x175/0x240 [ 29.570447] kthread+0x33c/0x400 [ 29.573787] ? sort_range+0x30/0x30 [ 29.577385] ? kthread_stop+0x7a0/0x7a0 [ 29.581338] ret_from_fork+0x3a/0x50 [ 29.585033] Code: 46 52 02 75 41 e8 d3 75 b9 fc 8b 85 80 fe ff ff 8d 70 01 89 b5 00 ff ff ff 48 8b b5 88 fe ff ff 4c 8d 24 c6 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 e8 01 00 00 8b 85 00 ff ff ff 4d 89 34 24 [ 29.604141] RIP: ipt_do_table+0x12ee/0x1950 RSP: ffff8801d9f56200 [ 29.610385] ---[ end trace 1ae60b7145f258ee ]--- [ 29.615124] Kernel panic - not syncing: Fatal exception in interrupt [ 29.621982] Dumping ftrace buffer: [ 29.625497] (ftrace buffer empty) [ 29.629174] Kernel Offset: disabled [ 29.632775] Rebooting in 86400 seconds..