[info] Using makefile-style concurrent boot in runlevel 2. [ 49.853889][ T26] audit: type=1800 audit(1574222690.719:21): pid=7455 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 49.901591][ T26] audit: type=1800 audit(1574222690.719:22): pid=7455 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 '10.128.0.91' (ECDSA) to the list of known hosts. 2019/11/20 04:05:02 fuzzer started 2019/11/20 04:05:04 dialing manager at 10.128.0.105:42849 2019/11/20 04:05:04 syscalls: 2566 2019/11/20 04:05:04 code coverage: enabled 2019/11/20 04:05:04 comparison tracing: enabled 2019/11/20 04:05:04 extra coverage: extra coverage is not supported by the kernel 2019/11/20 04:05:04 setuid sandbox: enabled 2019/11/20 04:05:04 namespace sandbox: enabled 2019/11/20 04:05:04 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/20 04:05:04 fault injection: enabled 2019/11/20 04:05:04 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/20 04:05:04 net packet injection: enabled 2019/11/20 04:05:04 net device setup: enabled 2019/11/20 04:05:04 concurrency sanitizer: enabled 2019/11/20 04:05:04 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 64.305652][ T7622] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/20 04:05:20 adding functions to KCSAN blacklist: 'tick_nohz_idle_stop_tick' 'poll_schedule_timeout' 'blk_mq_sched_dispatch_requests' 'echo_char' 'ep_poll' 'yama_ptracer_del' 'do_nanosleep' '__set_oom_adj' 'dst_alloc' 'tcp_add_backlog' 'wbt_done' 'audit_log_start' '__dev_queue_xmit' 'page_counter_try_charge' '__add_to_page_cache_locked' 'skb_dequeue' 'xas_find_marked' '__blk_queue_split' 'filemap_map_pages' 'xas_clear_mark' 'lruvec_lru_size' 'blk_mq_run_hw_queue' '__mark_inode_dirty' 'wbt_wait' 'wbt_issue' 'pcpu_alloc' 'rcu_gp_fqs_loop' '__skb_try_recv_from_queue' 'blk_stat_add' 'do_syslog' 'dd_has_work' 'futex_wait_queue_me' 'ext4_mark_iloc_dirty' 'd_instantiate_new' 'd_delete' 'tick_do_update_jiffies64' 'mm_update_next_owner' 'can_send' '__perf_event_overflow' 'ktime_get_real_seconds' 'evict' 'commit_echoes' 'snd_seq_check_queue' 'pid_update_inode' 'pipe_poll' 'find_next_bit' 'generic_fillattr' 'list_lru_count_one' 'blk_mq_get_request' 'ext4_mb_good_group' '__delete_from_page_cache' 'netlink_getname' 'ext4_nonda_switch' 'p9_poll_workfn' 'vm_area_dup' 'ext4_has_free_clusters' 'd_lru_add' 'ext4_mb_find_by_goal' 'rcu_gp_fqs_check_wake' 'common_perm_cond' 'generic_file_read_iter' 'snd_ctl_notify' 'ext4_da_write_end' 'tomoyo_supervisor' 'ext4_free_inode' 'ext4_free_inodes_count' 'file_update_time' '__fsnotify_parent' 'pipe_wait' 'do_readlinkat' 'add_timer' 'taskstats_exit' 'mod_timer' 'copy_process' 'timer_clear_idle' 'shmem_getpage_gfp' 'shmem_file_read_iter' 'del_timer' 'tick_sched_do_timer' 'sit_tunnel_xmit' 'blk_mq_dispatch_rq_list' 'n_tty_receive_buf_common' 'mem_cgroup_select_victim_node' 'run_timer_softirq' 'sbitmap_queue_clear' '__writeback_single_inode' 'add_timer_on' '__ext4_new_inode' 'generic_write_end' 'kauditd_thread' 'blk_mq_free_request' 'find_get_pages_range_tag' 'process_srcu' 'inactive_list_is_low' 'iput' '__hrtimer_run_queues' '__snd_rawmidi_transmit_ack' 'do_exit' 'atime_needs_update' '__tty_hangup' 'delete_from_page_cache_batch' [ 224.031656][ T7611] ================================================================== [ 224.039929][ T7611] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 224.047805][ T7611] [ 224.050162][ T7611] write to 0xffffffff8603bb08 of 280 bytes by interrupt on cpu 0: [ 224.057972][ T7611] timekeeping_advance+0x88e/0xd80 [ 224.063084][ T7611] update_wall_time+0x19/0x20 [ 224.067765][ T7611] tick_do_update_jiffies64+0x1a4/0x250 [ 224.073312][ T7611] tick_sched_do_timer+0xd4/0xe0 [ 224.078250][ T7611] tick_sched_timer+0x43/0xe0 [ 224.082930][ T7611] __hrtimer_run_queues+0x274/0x5f0 [ 224.088122][ T7611] hrtimer_interrupt+0x22a/0x480 [ 224.093040][ T7611] smp_apic_timer_interrupt+0xdc/0x280 [ 224.098478][ T7611] apic_timer_interrupt+0xf/0x20 [ 224.103400][ T7611] __sanitizer_cov_trace_switch+0x49/0x80 [ 224.109099][ T7611] nf_hook_slow+0x98/0x160 [ 224.113515][ T7611] ip_local_deliver+0x1e5/0x210 [ 224.118343][ T7611] ip_rcv_finish+0x121/0x160 [ 224.122930][ T7611] ip_rcv+0x18f/0x1a0 [ 224.126888][ T7611] __netif_receive_skb_one_core+0xa7/0xe0 [ 224.132579][ T7611] __netif_receive_skb+0x37/0xf0 [ 224.137504][ T7611] netif_receive_skb_internal+0x59/0x190 [ 224.143109][ T7611] napi_gro_receive+0x28f/0x330 [ 224.147939][ T7611] receive_buf+0x284/0x30b0 [ 224.152427][ T7611] virtnet_poll+0x436/0x7d0 [ 224.156922][ T7611] net_rx_action+0x3ae/0xa90 [ 224.161488][ T7611] __do_softirq+0x115/0x33f [ 224.165967][ T7611] run_ksoftirqd+0x46/0x60 [ 224.170358][ T7611] smpboot_thread_fn+0x37d/0x4a0 [ 224.175268][ T7611] kthread+0x1d4/0x200 [ 224.179312][ T7611] ret_from_fork+0x1f/0x30 [ 224.183699][ T7611] [ 224.186018][ T7611] read to 0xffffffff8603bb80 of 8 bytes by task 7611 on cpu 1: [ 224.193539][ T7611] ktime_get_seconds+0x45/0x70 [ 224.198283][ T7611] tcp_rcv_established+0xeeb/0xf50 [ 224.203370][ T7611] tcp_v4_do_rcv+0x3b5/0x520 [ 224.207938][ T7611] __release_sock+0x135/0x1e0 [ 224.212589][ T7611] release_sock+0x61/0x160 [ 224.217004][ T7611] tcp_recvmsg+0x653/0x1b40 [ 224.221485][ T7611] inet_recvmsg+0xbb/0x250 [ 224.225877][ T7611] sock_recvmsg+0x92/0xb0 [ 224.230180][ T7611] sock_read_iter+0x15f/0x1e0 [ 224.234831][ T7611] new_sync_read+0x389/0x4f0 [ 224.239396][ T7611] __vfs_read+0xb1/0xc0 [ 224.243526][ T7611] vfs_read+0x143/0x2c0 [ 224.247665][ T7611] ksys_read+0xd5/0x1b0 [ 224.251796][ T7611] __x64_sys_read+0x4c/0x60 [ 224.257058][ T7611] do_syscall_64+0xcc/0x370 [ 224.261537][ T7611] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 224.267504][ T7611] [ 224.269804][ T7611] Reported by Kernel Concurrency Sanitizer on: [ 224.275934][ T7611] CPU: 1 PID: 7611 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 224.283377][ T7611] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 224.293406][ T7611] ================================================================== [ 224.301441][ T7611] Kernel panic - not syncing: panic_on_warn set ... [ 224.308029][ T7611] CPU: 1 PID: 7611 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 224.315454][ T7611] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 224.325493][ T7611] Call Trace: [ 224.328766][ T7611] dump_stack+0x11d/0x181 [ 224.333075][ T7611] panic+0x210/0x640 [ 224.336953][ T7611] ? vprintk_func+0x8d/0x140 [ 224.341529][ T7611] kcsan_report.cold+0xc/0xd [ 224.346101][ T7611] kcsan_setup_watchpoint+0x3fe/0x460 [ 224.351458][ T7611] __tsan_read8+0xc6/0x100 [ 224.355864][ T7611] ktime_get_seconds+0x45/0x70 [ 224.360608][ T7611] tcp_rcv_established+0xeeb/0xf50 [ 224.365701][ T7611] ? ipv4_dst_check+0xc6/0xf0 [ 224.370357][ T7611] tcp_v4_do_rcv+0x3b5/0x520 [ 224.374930][ T7611] __release_sock+0x135/0x1e0 [ 224.379585][ T7611] release_sock+0x61/0x160 [ 224.384031][ T7611] tcp_recvmsg+0x653/0x1b40 [ 224.388562][ T7611] inet_recvmsg+0xbb/0x250 [ 224.392964][ T7611] ? apparmor_socket_recvmsg+0x3b/0x50 [ 224.398407][ T7611] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 224.404631][ T7611] ? security_socket_recvmsg+0x92/0xb0 [ 224.410078][ T7611] ? inet_sendpage+0x100/0x100 [ 224.414834][ T7611] sock_recvmsg+0x92/0xb0 [ 224.419150][ T7611] sock_read_iter+0x15f/0x1e0 [ 224.423823][ T7611] new_sync_read+0x389/0x4f0 [ 224.428414][ T7611] __vfs_read+0xb1/0xc0 [ 224.432548][ T7611] vfs_read+0x143/0x2c0 [ 224.436683][ T7611] ksys_read+0xd5/0x1b0 [ 224.441164][ T7611] __x64_sys_read+0x4c/0x60 [ 224.445658][ T7611] do_syscall_64+0xcc/0x370 [ 224.450161][ T7611] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 224.456038][ T7611] RIP: 0033:0x47c530 [ 224.459989][ T7611] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 224.479590][ T7611] RSP: 002b:000000c420602810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 224.487987][ T7611] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 224.495935][ T7611] RDX: 0000000000001000 RSI: 000000c42031c000 RDI: 0000000000000003 [ 224.503884][ T7611] RBP: 000000c420602868 R08: 0000000000000000 R09: 0000000000000000 [ 224.511832][ T7611] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000005 [ 224.519784][ T7611] R13: 000000c432b251e0 R14: 0000000000000002 R15: ffffffffffffffff [ 224.529518][ T7611] Kernel Offset: disabled [ 224.533857][ T7611] Rebooting in 86400 seconds..