[info] Using makefile-style concurrent boot in runlevel 2.
[   48.061324][   T26] audit: type=1800 audit(1579043770.355:21): pid=7838 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   48.111172][   T26] audit: type=1800 audit(1579043770.365:22): pid=7838 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 '10.128.1.28' (ECDSA) to the list of known hosts.
2020/01/14 23:16:22 fuzzer started
2020/01/14 23:16:24 dialing manager at 10.128.0.105:33449
2020/01/14 23:16:25 syscalls: 2836
2020/01/14 23:16:25 code coverage: enabled
2020/01/14 23:16:25 comparison tracing: enabled
2020/01/14 23:16:25 extra coverage: enabled
2020/01/14 23:16:25 setuid sandbox: enabled
2020/01/14 23:16:25 namespace sandbox: enabled
2020/01/14 23:16:25 Android sandbox: /sys/fs/selinux/policy does not exist
2020/01/14 23:16:25 fault injection: enabled
2020/01/14 23:16:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/01/14 23:16:25 net packet injection: enabled
2020/01/14 23:16:25 net device setup: enabled
2020/01/14 23:16:25 concurrency sanitizer: enabled
2020/01/14 23:16:25 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   66.282432][ T8003] KCSAN: could not find function: 'poll_schedule_timeout'
2020/01/14 23:16:33 adding functions to KCSAN blacklist: 'pid_update_inode' 'rcu_gp_fqs_check_wake' 'ext4_free_inodes_count' 'shmem_add_to_page_cache' 'run_timer_softirq' 'copy_process' '__mark_inode_dirty' 'wbt_issue' 'do_syslog' '__hrtimer_run_queues' 'ext4_free_inode' 'ktime_get_real_seconds' 'mm_update_next_owner' 'echo_char' 'wbt_done' 'audit_log_start' 'do_signal_stop' 'vm_area_dup' 'generic_fillattr' 'blk_mq_get_request' '__add_to_page_cache_locked' 'ext4_has_free_clusters' 'do_nanosleep' 'virtqueue_get_buf_ctx' 'ext4_mark_iloc_dirty' 'poll_schedule_timeout' 'add_timer' 'write_cache_pages' 'blk_mq_dispatch_rq_list' 'blk_mq_run_hw_queue' 'pipe_double_lock' 'blk_mq_sched_dispatch_requests' 'generic_permission' 'mod_timer' 'tick_sched_do_timer' 'kcm_rfree' 'common_perm_cond' 'generic_write_end' 'taskstats_exit' 'page_counter_try_charge' 'tick_nohz_idle_stop_tick' 'ext4_mb_good_group' 'sit_tunnel_xmit' 'ep_poll' '__ext4_new_inode' 'ext4_nonda_switch' 'tick_do_update_jiffies64' '__synchronize_hardirq' 'xas_find_marked' 'xas_clear_mark' 'rcu_gp_fqs_loop' 'kauditd_thread' 'find_next_bit' '__writeback_single_inode' 'timer_clear_idle' 'tomoyo_supervisor' 'find_get_pages_range_tag' 'dd_has_work' 
[  167.832224][ T8001] ==================================================================
[  167.840353][ T8001] BUG: KCSAN: data-race in handle_mm_fault / watchdog
[  167.847087][ T8001] 
[  167.849400][ T8001] read to 0xffff888122b6d090 of 8 bytes by task 1064 on cpu 0:
[  167.856926][ T8001]  watchdog+0x2b1/0x960
[  167.861070][ T8001]  kthread+0x1d4/0x200
[  167.865124][ T8001]  ret_from_fork+0x1f/0x30
[  167.869510][ T8001] 
[  167.871953][ T8001] write to 0xffff888122b6d090 of 8 bytes by task 8001 on cpu 1:
[  167.879587][ T8001]  handle_mm_fault+0x4a/0x530
[  167.884286][ T8001]  __do_page_fault+0x456/0x8d0
[  167.889053][ T8001]  do_page_fault+0x38/0x194
[  167.893542][ T8001]  page_fault+0x34/0x40
[  167.897685][ T8001] 
[  167.899991][ T8001] Reported by Kernel Concurrency Sanitizer on:
[  167.906136][ T8001] CPU: 1 PID: 8001 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[  167.915484][ T8001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  167.925641][ T8001] ==================================================================
[  167.933794][ T8001] Kernel panic - not syncing: panic_on_warn set ...
[  167.940370][ T8001] CPU: 1 PID: 8001 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[  167.948592][ T8001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  167.958641][ T8001] Call Trace:
[  167.961923][ T8001]  dump_stack+0x11d/0x181
[  167.966258][ T8001]  panic+0x210/0x640
[  167.970139][ T8001]  ? vprintk_func+0x8d/0x140
[  167.974749][ T8001]  kcsan_report.cold+0xc/0xd
[  167.979324][ T8001]  kcsan_setup_watchpoint+0x3fe/0x460
[  167.984680][ T8001]  __tsan_unaligned_write8+0xc7/0x110
[  167.990037][ T8001]  handle_mm_fault+0x4a/0x530
[  167.994703][ T8001]  __do_page_fault+0x456/0x8d0
[  167.999460][ T8001]  do_page_fault+0x38/0x194
[  168.003962][ T8001]  page_fault+0x34/0x40
[  168.008096][ T8001] RIP: 0033:0x40ad42
[  168.011987][ T8001] Code: 00 83 e1 0f bf 01 00 00 00 d3 e7 66 39 fa 73 8b 4d 85 d2 74 32 48 c1 e8 38 3c 04 73 03 83 c0 04 41 84 02 4d 89 c1 49 83 e0 07 <43> 88 04 02 4c 89 d0 4b 8d 4c 8a 08 8b 54 24 58 89 11 48 ff 03 49
[  168.031575][ T8001] RSP: 002b:000000c421c478d8 EFLAGS: 00010246
[  168.037620][ T8001] RAX: 00000000000000d1 RBX: 000000c435b40450 RCX: 000000000000000a
[  168.045572][ T8001] RDX: 0000000000000000 RSI: 0000000000866680 RDI: 0000000000000400
[  168.053537][ T8001] RBP: 000000c421c47910 R08: 0000000000000000 R09: 0000000000000000
[  168.061489][ T8001] R10: 000000c435b50d78 R11: 0000000000001a00 R12: 0000000000000600
[  168.069443][ T8001] R13: 0000000000000018 R14: 0000000000000057 R15: 0000000000000100
[  168.078848][ T8001] Kernel Offset: disabled
[  168.083193][ T8001] Rebooting in 86400 seconds..