[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 43.080505][ T26] audit: type=1800 audit(1573706718.967:21): pid=7557 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 43.133240][ T26] audit: type=1800 audit(1573706718.977:22): pid=7557 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.65' (ECDSA) to the list of known hosts.
2019/11/14 04:45:30 fuzzer started
2019/11/14 04:45:32 dialing manager at 10.128.0.105:45453
2019/11/14 04:45:32 syscalls: 2566
2019/11/14 04:45:32 code coverage: enabled
2019/11/14 04:45:32 comparison tracing: enabled
2019/11/14 04:45:32 extra coverage: extra coverage is not supported by the kernel
2019/11/14 04:45:32 setuid sandbox: enabled
2019/11/14 04:45:32 namespace sandbox: enabled
2019/11/14 04:45:32 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/14 04:45:32 fault injection: enabled
2019/11/14 04:45:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/14 04:45:32 net packet injection: enabled
2019/11/14 04:45:32 net device setup: enabled
2019/11/14 04:45:32 concurrency sanitizer: enabled
2019/11/14 04:45:32 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 65.000966][ T7724] KCSAN: could not find function: 'poll_schedule_timeout'
2019/11/14 04:45:56 adding functions to KCSAN blacklist: 'ep_poll' 'process_srcu' 'do_syslog' 'mem_cgroup_select_victim_node' 'ktime_get_seconds' 'snd_ctl_notify' 'do_exit' 'timer_clear_idle' 'unix_release_sock' 'xprt_connect' 'tomoyo_check_acl' 'tomoyo_supervisor' 'do_nanosleep' 'futex_wait_queue_me' 'kvm_mmu_notifier_invalidate_range_end' 'mm_update_next_owner' 'n_tty_receive_buf_common' 'common_perm_cond' 'rcu_gp_fqs_loop' 'filemap_map_pages' 'pid_update_inode' '__add_to_page_cache_locked' 'xas_find_marked' 'exit_signals' 'skb_dequeue' 'tcp_add_backlog' 'ksys_read' 'atime_needs_update' 'commit_echoes' 'blk_stat_add' 'ip_finish_output2' 'run_timer_softirq' 'ext4_free_inode' '__wb_update_bandwidth' 'dput' '__lru_cache_add' 'tick_sched_do_timer' 'ext4_has_free_clusters' 'p9_client_cb' 'virtqueue_disable_cb' 'wbt_wait' 'poll_schedule_timeout' 'shmem_add_to_page_cache' '__writeback_single_inode' 'find_next_bit' 'taskstats_exit' 'blk_mq_sched_dispatch_requests' 'rq_depth_scale_up' 'shmem_file_read_iter' 'fasync_remove_entry' 'wbt_issue' 'ext4_free_inodes_count' 'rcu_gp_fqs_check_wake' 'pcpu_alloc' 'smpboot_thread_fn' 'page_counter_try_charge' '__find_get_block' 'netlink_getname' 'mod_timer' 'copy_process' 'wbc_detach_inode' '__delete_from_page_cache' 'batadv_tt_local_add' 'generic_fillattr' 'ksys_write' '__process_echoes' 'blk_mq_run_hw_queue' 'calc_timer_values' 'ext4_setattr' 'find_get_pages_range_tag' 'kauditd_thread' '__filemap_fdatawrite_range' 'fsverity_file_open' 'vm_area_dup' 'blk_mq_free_request' 'tick_do_update_jiffies64' 'audit_log_start' '__perf_event_overflow' 'complete_signal' 'domain_update_bandwidth' '__d_lookup_done' 'snd_seq_check_queue' '__mark_inode_dirty' 'inactive_list_is_low' 'snd_rawmidi_kernel_write1' 'l2tp_tunnel_del_work' 'pipe_poll' '__ext4_new_inode' 'icmp_global_allow' 'p9_poll_workfn' 'del_timer' 'shmem_getpage_gfp' 'ext4_mark_iloc_dirty' 'lruvec_lru_size' 'pipe_wait' 'evict' 'page_counter_charge' 'generic_file_read_iter' '__skb_try_recv_from_queue' 'ktime_get_real_seconds' 'do_readlinkat' '__skb_wait_for_more_packets' 'ipip_tunnel_xmit' 'dd_has_work' 'do_signal_stop' 'sit_tunnel_xmit' 'clean_buffers' 'xas_clear_mark' 'tick_nohz_idle_stop_tick' '__dev_queue_xmit' '__remove_hrtimer' 'ext4_mb_good_group' 'packet_do_bind' '__hrtimer_run_queues' 'blk_mq_dispatch_rq_list' 'echo_char' 'snd_seq_prioq_cell_out' 'mousedev_poll' '__rcu_read_unlock' '__acct_update_integrals' 'percpu_counter_add_batch' 'enqueue_timer' 'blk_mq_get_request' 'free_pid' 'ext4_writepages' 'delete_from_page_cache_batch' '__do_page_fault' 'add_timer' 'ext4_nonda_switch' 'kernfs_refresh_inode' 'list_lru_count_one' 'ext4_es_lookup_extent' 'find_alive_thread' 'vti_tunnel_xmit' '__snd_rawmidi_transmit_ack' 'yama_ptracer_del' 'vfs_fsync_range' 'generic_write_end' 'bio_chain' 'bio_endio'
[ 312.220201][ C1] ==================================================================
[ 312.228383][ C1] BUG: KCSAN: data-race in virtqueue_enable_cb_delayed / virtqueue_enable_cb_prepare
[ 312.237846][ C1]
[ 312.240185][ C1] read to 0xffff888128c298b0 of 2 bytes by interrupt on cpu 0:
[ 312.247739][ C1] virtqueue_enable_cb_delayed+0x1dc/0x4d0
[ 312.253845][ C1] start_xmit+0xb0f/0xbe0
[ 312.258246][ C1] dev_hard_start_xmit+0xef/0x430
[ 312.263273][ C1] sch_direct_xmit+0x2b3/0x900
[ 312.268055][ C1] __dev_queue_xmit+0x19a3/0x1b40
[ 312.273073][ C1] dev_queue_xmit+0x21/0x30
[ 312.277562][ C1] ip_finish_output2+0x836/0xe40
[ 312.282486][ C1] __ip_finish_output+0x23a/0x490
[ 312.287518][ C1] ip_finish_output+0x41/0x160
[ 312.292282][ C1] ip_output+0xdf/0x210
[ 312.296430][ C1] ip_local_out+0x74/0x90
[ 312.300743][ C1] __ip_queue_xmit+0x3a8/0xa40
[ 312.305489][ C1] ip_queue_xmit+0x45/0x60
[ 312.309911][ C1] __tcp_transmit_skb+0xe81/0x1d60
[ 312.315012][ C1] __tcp_send_ack+0x246/0x300
[ 312.319701][ C1] tcp_send_ack+0x34/0x40
[ 312.324023][ C1] __tcp_ack_snd_check+0xd9/0x4f0
[ 312.329054][ C1] tcp_rcv_established+0xce9/0xf50
[ 312.334190][ C1] tcp_v4_do_rcv+0x3b5/0x520
[ 312.338773][ C1] tcp_v4_rcv+0x19ec/0x1bd0
[ 312.343263][ C1] ip_protocol_deliver_rcu+0x4d/0x420
[ 312.348636][ C1] ip_local_deliver_finish+0x110/0x140
[ 312.354095][ C1] ip_local_deliver+0x133/0x210
[ 312.358955][ C1] ip_rcv_finish+0x121/0x160
[ 312.363558][ C1] ip_rcv+0x18f/0x1a0
[ 312.367546][ C1] __netif_receive_skb_one_core+0xa7/0xe0
[ 312.373268][ C1] __netif_receive_skb+0x37/0xf0
[ 312.378203][ C1] netif_receive_skb_internal+0x59/0x190
[ 312.383834][ C1] napi_gro_receive+0x28f/0x330
[ 312.388828][ C1] receive_buf+0x284/0x30b0
[ 312.393341][ C1] virtnet_poll+0x436/0x7d0
[ 312.397843][ C1] net_rx_action+0x3ae/0xa90
[ 312.402430][ C1] __do_softirq+0x115/0x33f
[ 312.406989][ C1] irq_exit+0xbb/0xe0
[ 312.410988][ C1] do_IRQ+0xa6/0x180
[ 312.414873][ C1] ret_from_intr+0x0/0x19
[ 312.419250][ C1] native_safe_halt+0xe/0x10
[ 312.423840][ C1] arch_cpu_idle+0x1f/0x30
[ 312.428250][ C1] default_idle_call+0x1e/0x40
[ 312.433012][ C1] do_idle+0x1af/0x280
[ 312.437087][ C1] cpu_startup_entry+0x1b/0x20
[ 312.441852][ C1] rest_init+0xec/0xf6
[ 312.445922][ C1] arch_call_rest_init+0x17/0x37
[ 312.450859][ C1] start_kernel+0x838/0x85e
[ 312.455366][ C1] x86_64_start_reservations+0x29/0x2b
[ 312.460825][ C1] x86_64_start_kernel+0x72/0x76
[ 312.465759][ C1] secondary_startup_64+0xa4/0xb0
[ 312.470772][ C1]
[ 312.473108][ C1] write to 0xffff888128c298b0 of 2 bytes by interrupt on cpu 1:
[ 312.480746][ C1] virtqueue_enable_cb_prepare+0x1ce/0x2b0
[ 312.486559][ C1] virtqueue_napi_complete+0x2c/0xa0
[ 312.492015][ C1] virtnet_poll_tx+0x15f/0x1d0
[ 312.496766][ C1] net_rx_action+0x3ae/0xa90
[ 312.501347][ C1] __do_softirq+0x115/0x33f
[ 312.505842][ C1] irq_exit+0xbb/0xe0
[ 312.509833][ C1] do_IRQ+0xa6/0x180
[ 312.513727][ C1] ret_from_intr+0x0/0x19
[ 312.518082][ C1] native_safe_halt+0xe/0x10
[ 312.522681][ C1] arch_cpu_idle+0x1f/0x30
[ 312.527097][ C1] default_idle_call+0x1e/0x40
[ 312.531852][ C1] do_idle+0x1af/0x280
[ 312.535983][ C1] cpu_startup_entry+0x1b/0x20
[ 312.540738][ C1] start_secondary+0x208/0x260
[ 312.545501][ C1] secondary_startup_64+0xa4/0xb0
[ 312.550510][ C1]
[ 312.552893][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 312.559039][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[ 312.566128][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 312.576180][ C1] ==================================================================
[ 312.584591][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 312.591172][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[ 312.598263][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 312.608324][ C1] Call Trace:
[ 312.611606][ C1]
[ 312.614454][ C1] dump_stack+0x11d/0x181
[ 312.618779][ C1] panic+0x210/0x640
[ 312.622675][ C1] ? vprintk_func+0x8d/0x140
[ 312.627250][ C1] kcsan_report.cold+0xc/0x1a
[ 312.631917][ C1] kcsan_setup_watchpoint+0x3fe/0x460
[ 312.637278][ C1] __tsan_unaligned_write2+0xc4/0x100
[ 312.642651][ C1] virtqueue_enable_cb_prepare+0x1ce/0x2b0
[ 312.648459][ C1] virtqueue_napi_complete+0x2c/0xa0
[ 312.653734][ C1] virtnet_poll_tx+0x15f/0x1d0
[ 312.658504][ C1] net_rx_action+0x3ae/0xa90
[ 312.663381][ C1] __do_softirq+0x115/0x33f
[ 312.667981][ C1] irq_exit+0xbb/0xe0
[ 312.672175][ C1] do_IRQ+0xa6/0x180
[ 312.676081][ C1] common_interrupt+0xf/0xf
[ 312.680578][ C1]
[ 312.683519][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 312.688879][ C1] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 6c 52 47 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 5c 52 47 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 d2 9a 9f fc e8 bd 3f b5 fd 0f
[ 312.708479][ C1] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd9
[ 312.716971][ C1] RAX: 000000000000011f RBX: ffff88812b38b0c0 RCX: ffffffff86049ce8
[ 312.724963][ C1] RDX: 0000000000000000 RSI: ffffffff82506027 RDI: ffffffff85a56378
[ 312.732950][ C1] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a56378
[ 312.740924][ C1] R10: 0000c90000cd3d58 R11: 0000ffff85a5637f R12: 0000000000000001
[ 312.748881][ C1] R13: ffff88812b38b0c0 R14: 0000000000000000 R15: 0000000000000000
[ 312.757084][ C1] ? debug_smp_processor_id+0x47/0x172
[ 312.762560][ C1] ? default_idle+0x50/0x230
[ 312.767161][ C1] arch_cpu_idle+0x1f/0x30
[ 312.771859][ C1] default_idle_call+0x1e/0x40
[ 312.776638][ C1] do_idle+0x1af/0x280
[ 312.780697][ C1] cpu_startup_entry+0x1b/0x20
[ 312.785450][ C1] start_secondary+0x208/0x260
[ 312.790225][ C1] secondary_startup_64+0xa4/0xb0
[ 312.796834][ C1] Kernel Offset: disabled
[ 312.801161][ C1] Rebooting in 86400 seconds..