[info] Using makefile-style concurrent boot in runlevel 2. [ 45.526506][ T25] audit: type=1800 audit(1574903209.286:21): pid=7540 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 45.580198][ T25] audit: type=1800 audit(1574903209.286:22): pid=7540 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 '10.128.0.181' (ECDSA) to the list of known hosts. 2019/11/28 01:07:02 fuzzer started 2019/11/28 01:07:04 dialing manager at 10.128.0.105:36065 2019/11/28 01:07:17 syscalls: 2567 2019/11/28 01:07:17 code coverage: enabled 2019/11/28 01:07:17 comparison tracing: enabled 2019/11/28 01:07:17 extra coverage: extra coverage is not supported by the kernel 2019/11/28 01:07:17 setuid sandbox: enabled 2019/11/28 01:07:17 namespace sandbox: enabled 2019/11/28 01:07:17 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/28 01:07:17 fault injection: enabled 2019/11/28 01:07:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/28 01:07:17 net packet injection: enabled 2019/11/28 01:07:17 net device setup: enabled 2019/11/28 01:07:17 concurrency sanitizer: enabled 2019/11/28 01:07:17 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 83.468071][ T7710] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/28 01:07:29 adding functions to KCSAN blacklist: 'blk_mq_dispatch_rq_list' 'blk_stat_add' 'tick_nohz_idle_stop_tick' 'dput' 'mem_cgroup_select_victim_node' 'ktime_get_real_seconds' '__skb_try_recv_from_queue' '__perf_event_overflow' 'mm_update_next_owner' 'find_next_bit' 'wbt_done' 'pid_update_inode' 'timer_clear_idle' 'wbt_issue' 'n_tty_receive_buf_common' 'find_get_pages_range_tag' 'run_timer_softirq' 'pipe_wait' 'iput' 'ktime_get_seconds' 'process_srcu' 'blk_mq_run_hw_queue' 'icmp_global_allow' 'vm_area_dup' 'generic_write_end' 'do_nanosleep' 'taskstats_exit' 'dd_has_work' '__d_lookup_done' 'echo_char' '__delete_from_page_cache' 'kauditd_thread' 'pcpu_alloc' '__dev_queue_xmit' 'p9_poll_workfn' 'd_delete' 'ip6_tnl_start_xmit' 'ext4_mb_good_group' 'relay_switch_subbuf' '__ext4_new_inode' 'add_timer' 'copy_process' '__hrtimer_run_queues' 'rcu_gp_fqs_loop' 'snd_seq_prioq_cell_out' 'balance_dirty_pages' '__mark_inode_dirty' 'mod_timer' 'wbc_detach_inode' 'xprt_connect' 'xas_find_marked' 'tcp_add_backlog' 'pipe_poll' 'tick_sched_do_timer' 'audit_log_start' 'alloc_empty_file' '__remove_hrtimer' 'blk_mq_sched_dispatch_requests' 'ext4_free_inodes_count' '__snd_rawmidi_transmit_ack' 'poll_schedule_timeout' 'ext4_nonda_switch' 'do_exit' 'futex_wait_queue_me' 'list_lru_count_one' 'ep_poll' 'rcu_gp_fqs_check_wake' 'ext4_has_free_clusters' 'xas_clear_mark' 'do_syslog' 'list_lru_add' 'd_instantiate_new' 'tomoyo_supervisor' 'blk_mq_get_request' 'tick_do_update_jiffies64' 'ext4_free_inode' 'inet_dgram_connect' 'generic_fillattr' 'lruvec_lru_size' [ 104.251771][ C0] ================================================================== [ 104.260029][ C0] BUG: KCSAN: data-race in ktime_get_with_offset / timekeeping_advance [ 104.268347][ C0] [ 104.270660][ C0] write to 0xffffffff8603cb08 of 280 bytes by interrupt on cpu 1: [ 104.278709][ C0] timekeeping_advance+0x88e/0xd80 [ 104.283909][ C0] update_wall_time+0x19/0x20 [ 104.288576][ C0] tick_do_update_jiffies64+0x1a4/0x250 [ 104.294102][ C0] tick_sched_do_timer+0xd4/0xe0 [ 104.299030][ C0] tick_sched_timer+0x43/0xe0 [ 104.303689][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 104.308867][ C0] hrtimer_interrupt+0x22a/0x480 [ 104.314046][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 104.319602][ C0] apic_timer_interrupt+0xf/0x20 [ 104.324571][ C0] kcsan_setup_watchpoint+0x1d4/0x460 [ 104.330046][ C0] __tsan_unaligned_write4+0xc4/0x100 [ 104.335482][ C0] tcp_recvmsg+0xdab/0x1b40 [ 104.340152][ C0] inet_recvmsg+0xbb/0x250 [ 104.344547][ C0] sock_recvmsg+0x92/0xb0 [ 104.348864][ C0] sock_read_iter+0x15f/0x1e0 [ 104.353708][ C0] new_sync_read+0x389/0x4f0 [ 104.358287][ C0] __vfs_read+0xb1/0xc0 [ 104.362430][ C0] vfs_read+0x143/0x2c0 [ 104.366567][ C0] ksys_read+0xd5/0x1b0 [ 104.370711][ C0] __x64_sys_read+0x4c/0x60 [ 104.375196][ C0] do_syscall_64+0xcc/0x370 [ 104.379689][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 104.385554][ C0] [ 104.387865][ C0] read to 0xffffffff8603cb28 of 8 bytes by interrupt on cpu 0: [ 104.395524][ C0] ktime_get_with_offset+0x136/0x230 [ 104.400805][ C0] netif_receive_skb_internal+0x13e/0x190 [ 104.406695][ C0] napi_gro_receive+0x28f/0x330 [ 104.411529][ C0] receive_buf+0x284/0x30b0 [ 104.416183][ C0] virtnet_poll+0x436/0x7d0 [ 104.420759][ C0] net_rx_action+0x3ae/0xa90 [ 104.425334][ C0] __do_softirq+0x115/0x33f [ 104.429818][ C0] run_ksoftirqd+0x46/0x60 [ 104.434219][ C0] smpboot_thread_fn+0x37d/0x4a0 [ 104.439131][ C0] kthread+0x1d4/0x200 [ 104.443188][ C0] ret_from_fork+0x1f/0x30 [ 104.447585][ C0] [ 104.449890][ C0] Reported by Kernel Concurrency Sanitizer on: [ 104.456122][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.0-syzkaller #0 [ 104.463814][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.474379][ C0] ================================================================== [ 104.482512][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 104.489116][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.0-syzkaller #0 [ 104.496904][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.506998][ C0] Call Trace: [ 104.510280][ C0] dump_stack+0x11d/0x181 [ 104.514704][ C0] panic+0x210/0x640 [ 104.518609][ C0] ? vprintk_func+0x8d/0x140 [ 104.523456][ C0] kcsan_report.cold+0xc/0xd [ 104.528045][ C0] kcsan_setup_watchpoint+0x3fe/0x460 [ 104.533406][ C0] __tsan_read8+0xc6/0x100 [ 104.537812][ C0] ktime_get_with_offset+0x136/0x230 [ 104.543090][ C0] netif_receive_skb_internal+0x13e/0x190 [ 104.548926][ C0] napi_gro_receive+0x28f/0x330 [ 104.553886][ C0] receive_buf+0x284/0x30b0 [ 104.558384][ C0] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 104.563837][ C0] ? virtqueue_get_buf+0x31/0x40 [ 104.568767][ C0] virtnet_poll+0x436/0x7d0 [ 104.573271][ C0] net_rx_action+0x3ae/0xa90 [ 104.577850][ C0] __do_softirq+0x115/0x33f [ 104.582338][ C0] ? takeover_tasklets+0x250/0x250 [ 104.587437][ C0] run_ksoftirqd+0x46/0x60 [ 104.591831][ C0] smpboot_thread_fn+0x37d/0x4a0 [ 104.596762][ C0] kthread+0x1d4/0x200 [ 104.600810][ C0] ? constant_test_bit.constprop.0+0x30/0x30 [ 104.606776][ C0] ? kthread_stop+0x2d0/0x2d0 [ 104.611434][ C0] ret_from_fork+0x1f/0x30 [ 104.617587][ C0] Kernel Offset: disabled [ 104.621917][ C0] Rebooting in 86400 seconds..