[info] Using makefile-style concurrent boot in runlevel 2. [ 43.889075][ T25] audit: type=1800 audit(1572147063.679:21): pid=7103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 43.917520][ T25] audit: type=1800 audit(1572147063.679:22): pid=7103 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[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.143' (ECDSA) to the list of known hosts. 2019/10/27 03:31:12 fuzzer started 2019/10/27 03:31:14 dialing manager at 10.128.0.105:33655 2019/10/27 03:31:14 syscalls: 2533 2019/10/27 03:31:14 code coverage: enabled 2019/10/27 03:31:14 comparison tracing: enabled 2019/10/27 03:31:14 extra coverage: extra coverage is not supported by the kernel 2019/10/27 03:31:14 setuid sandbox: enabled 2019/10/27 03:31:14 namespace sandbox: enabled 2019/10/27 03:31:14 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/27 03:31:14 fault injection: enabled 2019/10/27 03:31:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/27 03:31:14 net packet injection: enabled 2019/10/27 03:31:14 net device setup: enabled 2019/10/27 03:31:14 concurrency sanitizer: enabled syzkaller login: [ 79.751721][ T7267] KCSAN: could not find function: 'poll_schedule_timeout' 2019/10/27 03:31:43 adding functions to KCSAN blacklist: 'inet_dgram_connect' 'fuse_get_req' '__hrtimer_run_queues' '__skb_try_recv_from_queue' 'blk_mq_get_request' 'virtnet_poll_tx' 'mem_cgroup_select_victim_node' '__acct_update_integrals' 'ep_poll' 'kvm_arch_vcpu_load' 'rcu_gp_fqs_check_wake' 'taskstats_exit' 'audit_log_start' '__skb_recv_udp' 'find_get_pages_range_tag' '__find_get_block' 'ktime_get_real_seconds' 'ext4_has_free_clusters' 'wbt_done' '__alloc_file' 'snd_seq_prioq_cell_out' 'pipe_poll' 'fsnotify' 'timer_clear_idle' 'kauditd_thread' 'rcu_gp_fqs_loop' 'shmem_getpage_gfp' 'echo_char' '__add_to_page_cache_locked' 'ext4_da_write_end' 'blk_stat_add' 'generic_fillattr' 'dccp_rcv_close' 'handle_userfault' 'blk_mq_dispatch_rq_list' '__snd_rawmidi_transmit_ack' 'do_exit' 'osq_lock' 'list_lru_count_one' 'pid_update_inode' 'tcp_poll' 'mod_timer' 'vfs_fsync_range' 'tcp_add_backlog' '__delete_from_page_cache' 'fib6_ifup' 'filemap_map_pages' 'do_syslog' '__nf_conntrack_find_get' 'ext4_mark_iloc_dirty' 'kernfs_refresh_inode' 'ext4_ext_insert_extent' 'list_lru_add' 'tick_sched_do_timer' 'tcp_sendmsg_locked' 'snd_seq_check_queue' 'do_wait' 'tick_do_update_jiffies64' 'task_dump_owner' 'tcp_v4_rcv' '__skb_wait_for_more_packets' 'd_delete' 'get_task_cred' 'ext4_free_inode' 'ext4_nonda_switch' 'inet_putpeer' 'queue_access_lock' 'blk_mq_run_hw_queue' 'pvclock_gtod_notify' 'fprop_fraction_percpu' 'get_task_mm' 'balance_dirty_pages' 'shmem_file_read_iter' 'run_timer_softirq' 'n_tty_receive_buf_common' 'atime_needs_update' 'tomoyo_supervisor' '__nf_ct_refresh_acct' 'add_timer' 'common_perm_cond' 'wbt_issue' 'ipip_tunnel_xmit' '__neigh_event_send' 'datagram_poll' 'pcpu_alloc' 'blk_mq_sched_dispatch_requests' 'mm_update_next_owner' 'do_readlinkat' 'page_counter_try_charge' 'do_nanosleep' 'watchdog' 'pipe_wait' '__ext4_new_inode' 'update_defense_level' 'ktime_get_seconds' 'ext4_mb_good_group' 'sk_wait_data' '__dev_queue_xmit' 'kvm_arch_vcpu_create' 'vm_area_dup' 'ext4_free_inodes_count' 'icmp_global_allow' 'process_srcu' 'batadv_tt_local_add' 'copy_creds' 'generic_write_end' 'commit_echoes' 'snapshot_refaults' 'bio_endio' 'p9_poll_workfn' 'copy_process' 'ext4_setattr' 'tomoyo_check_path_acl' 'find_next_bit' 'poll_schedule_timeout' 'sit_tunnel_xmit' 'vti_tunnel_xmit' 'xas_clear_mark' 'shmem_add_to_page_cache' 'dd_has_work' 'xas_find_marked' 'futex_wait_queue_me' 'ip_finish_output2' 'generic_permission' 'tick_nohz_idle_stop_tick' 'get_wchan' [ 331.144611][ C1] ================================================================== [ 331.152747][ C1] BUG: KCSAN: data-race in ktime_get / timekeeping_advance [ 331.159918][ C1] [ 331.162235][ C1] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 0: [ 331.170019][ C1] timekeeping_advance+0x893/0xd80 [ 331.175114][ C1] update_wall_time+0x19/0x20 [ 331.179790][ C1] tick_do_update_jiffies64+0x1ae/0x260 [ 331.185343][ C1] tick_sched_do_timer+0xd4/0xe0 [ 331.190270][ C1] tick_sched_timer+0x43/0xe0 [ 331.194929][ C1] __hrtimer_run_queues+0x288/0x600 [ 331.200110][ C1] hrtimer_interrupt+0x22a/0x480 [ 331.205136][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 331.210589][ C1] apic_timer_interrupt+0xf/0x20 [ 331.215518][ C1] __kcsan_check_watchpoint+0x94/0x180 [ 331.221490][ C1] __tsan_read8+0x15/0x30 [ 331.225804][ C1] aa_sk_perm+0x131/0x450 [ 331.230217][ C1] aa_sock_msg_perm.isra.0+0x9d/0x140 [ 331.235588][ C1] apparmor_socket_recvmsg+0x33/0x50 [ 331.240850][ C1] [ 331.243165][ C1] read to 0xffffffff86040b24 of 4 bytes by interrupt on cpu 1: [ 331.250690][ C1] ktime_get+0x12f/0x210 [ 331.254934][ C1] tcp_mstamp_refresh+0x1d/0x70 [ 331.259767][ C1] tcp_rcv_established+0x7c/0xf50 [ 331.264777][ C1] tcp_v4_do_rcv+0x381/0x4e0 [ 331.269352][ C1] tcp_v4_rcv+0x19dc/0x1bb0 [ 331.273836][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 331.279188][ C1] ip_local_deliver_finish+0x110/0x140 [ 331.285584][ C1] ip_local_deliver+0x133/0x210 [ 331.290422][ C1] ip_rcv_finish+0x121/0x160 [ 331.294993][ C1] ip_rcv+0x18f/0x1a0 [ 331.298959][ C1] __netif_receive_skb_one_core+0xa7/0xe0 [ 331.304674][ C1] __netif_receive_skb+0x37/0xf0 [ 331.309596][ C1] netif_receive_skb_internal+0x59/0x190 [ 331.315199][ C1] [ 331.317507][ C1] Reported by Kernel Concurrency Sanitizer on: [ 331.323642][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.4.0-rc3+ #0 [ 331.331007][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 331.341042][ C1] ================================================================== [ 331.349107][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 331.355690][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.4.0-rc3+ #0 [ 331.363038][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 331.373075][ C1] Call Trace: [ 331.376356][ C1] dump_stack+0xf5/0x159 [ 331.380585][ C1] panic+0x210/0x640 [ 331.384479][ C1] ? ip_rcv_finish+0x121/0x160 [ 331.389236][ C1] ? vprintk_func+0x8d/0x140 [ 331.393812][ C1] kcsan_report.cold+0xc/0x10 [ 331.398475][ C1] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 331.404018][ C1] __tsan_read4+0x2c/0x30 [ 331.408330][ C1] ktime_get+0x12f/0x210 [ 331.412606][ C1] tcp_mstamp_refresh+0x1d/0x70 [ 331.417472][ C1] tcp_rcv_established+0x7c/0xf50 [ 331.422502][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 331.428395][ C1] ? __tsan_read4+0x2c/0x30 [ 331.432886][ C1] ? ipv4_dst_check+0xc6/0xf0 [ 331.437554][ C1] tcp_v4_do_rcv+0x381/0x4e0 [ 331.442132][ C1] tcp_v4_rcv+0x19dc/0x1bb0 [ 331.446620][ C1] ? __tsan_read8+0x2c/0x30 [ 331.451114][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 331.456483][ C1] ip_local_deliver_finish+0x110/0x140 [ 331.462034][ C1] ip_local_deliver+0x133/0x210 [ 331.466870][ C1] ? ip_protocol_deliver_rcu+0x420/0x420 [ 331.472487][ C1] ip_rcv_finish+0x121/0x160 [ 331.477069][ C1] ip_rcv+0x18f/0x1a0 [ 331.481041][ C1] ? ip_sublist_rcv+0x5e0/0x5e0 [ 331.485878][ C1] ? ip_local_deliver+0x210/0x210 [ 331.490888][ C1] __netif_receive_skb_one_core+0xa7/0xe0 [ 331.496598][ C1] __netif_receive_skb+0x37/0xf0 [ 331.501523][ C1] netif_receive_skb_internal+0x59/0x190 [ 331.507158][ C1] napi_gro_receive+0x28f/0x330 [ 331.512093][ C1] receive_buf+0x284/0x30b0 [ 331.516580][ C1] ? __tsan_write8+0x32/0x40 [ 331.521165][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 331.526609][ C1] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 331.532225][ C1] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 331.537845][ C1] virtnet_poll+0x436/0x7d0 [ 331.542345][ C1] net_rx_action+0x3ae/0xa90 [ 331.546929][ C1] __do_softirq+0x115/0x33f [ 331.551422][ C1] ? takeover_tasklets+0x250/0x250 [ 331.556518][ C1] run_ksoftirqd+0x46/0x60 [ 331.560918][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 331.565841][ C1] kthread+0x1d4/0x200 [ 331.569893][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 331.575856][ C1] ? kthread_stop+0x2d0/0x2d0 [ 331.580517][ C1] ret_from_fork+0x1f/0x30 [ 331.586286][ C1] Kernel Offset: disabled [ 331.590664][ C1] Rebooting in 86400 seconds..