[info] Using makefile-style concurrent boot in runlevel 2.
[   46.801252][   T27] audit: type=1800 audit(1580622878.952:21): pid=7796 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   46.849816][   T27] audit: type=1800 audit(1580622878.952:22): pid=7796 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 '10.128.0.185' (ECDSA) to the list of known hosts.
2020/02/02 05:54:50 fuzzer started
2020/02/02 05:54:51 dialing manager at 10.128.0.105:42903
2020/02/02 05:54:52 syscalls: 2904
2020/02/02 05:54:52 code coverage: enabled
2020/02/02 05:54:52 comparison tracing: enabled
2020/02/02 05:54:52 extra coverage: enabled
2020/02/02 05:54:52 setuid sandbox: enabled
2020/02/02 05:54:52 namespace sandbox: enabled
2020/02/02 05:54:52 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/02 05:54:52 fault injection: enabled
2020/02/02 05:54:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/02 05:54:52 net packet injection: enabled
2020/02/02 05:54:52 net device setup: enabled
2020/02/02 05:54:52 concurrency sanitizer: enabled
2020/02/02 05:54:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   63.368113][ T7960] KCSAN: could not find function: 'poll_schedule_timeout'
2020/02/02 05:55:03 adding functions to KCSAN blacklist: '__snd_rawmidi_transmit_ack' 'audit_log_start' 'find_get_pages_range_tag' 'enqueue_timer' 'tomoyo_domain_quota_is_ok' 'tick_do_update_jiffies64' 'kauditd_thread' '__get_user_pages' '__remove_assoc_queue' 'tick_sched_do_timer' 'ktime_get_seconds' '__delete_from_page_cache' 'install_new_memslots' 'ext4_sync_file' 'xas_find_marked' 'do_dentry_open' 'vm_area_dup' 'generic_fillattr' 'commit_echoes' 'generic_file_read_iter' 'del_timer' 'handle_userfault' 'taskstats_exit' 'common_perm_cond' 'ext4_nonda_switch' 'poll_schedule_timeout' 'tomoyo_supervisor' 'ktime_get_real_seconds' 'wbt_issue' 'get_cpu_idle_time_us' '__ext4_new_inode' 'blk_mq_get_request' '__hrtimer_run_queues' 'mod_timer' 'do_exit' 'mm_update_next_owner' 'pid_update_inode' 'timer_clear_idle' 'copy_process' 'page_counter_try_charge' 'filemap_fault' 'wbt_done' 'dput' 'fib6_ifup' 'kcm_rcv_strparser' 'ext4_free_inodes_count' 'process_srcu' 'tick_nohz_idle_stop_tick' 'ext4_mark_iloc_dirty' 'blk_mq_sched_dispatch_requests' 'do_syslog' 'ext4_handle_inode_extension' 'do_signal_stop' 'ext4_da_write_end' 'n_tty_receive_buf_common' 'atime_needs_update' 'yama_ptracer_del' 'fsnotify' 'find_next_bit' 'blk_mq_run_hw_queue' 'run_timer_softirq' 'echo_char' 'generic_write_end' 'futex_wait_queue_me' 'pcpu_alloc' '__process_echoes' 'add_timer' 'dd_has_work' 'ep_poll' 'rcu_gp_fqs_check_wake' 'ext4_free_inode' 'blk_mq_dispatch_rq_list' 'other_inode_match' 'shmem_add_to_page_cache' '__rb_insert_augmented' 'do_nanosleep' 'xas_clear_mark' 'ext4_has_free_clusters' 
[  146.646011][ T7944] ==================================================================
[  146.654145][ T7944] BUG: KCSAN: data-race in handle_mm_fault / watchdog
[  146.660884][ T7944] 
[  146.663205][ T7944] read to 0xffff88812a8ba090 of 8 bytes by task 1061 on cpu 0:
[  146.670741][ T7944]  watchdog+0x2b1/0x960
[  146.674898][ T7944]  kthread+0x1d4/0x200
[  146.678961][ T7944]  ret_from_fork+0x1f/0x30
[  146.683356][ T7944] 
[  146.685679][ T7944] write to 0xffff88812a8ba090 of 8 bytes by task 7944 on cpu 1:
[  146.693298][ T7944]  handle_mm_fault+0x4a/0x530
[  146.697970][ T7944]  __do_page_fault+0x456/0x8d0
[  146.702720][ T7944]  do_page_fault+0x38/0x194
[  146.707218][ T7944]  page_fault+0x34/0x40
[  146.711354][ T7944] 
[  146.713668][ T7944] Reported by Kernel Concurrency Sanitizer on:
[  146.719814][ T7944] CPU: 1 PID: 7944 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[  146.728034][ T7944] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  146.738074][ T7944] ==================================================================
[  146.746384][ T7944] Kernel panic - not syncing: panic_on_warn set ...
[  146.752962][ T7944] CPU: 1 PID: 7944 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[  146.761181][ T7944] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  146.771223][ T7944] Call Trace:
[  146.774593][ T7944]  dump_stack+0x11d/0x181
[  146.778916][ T7944]  panic+0x210/0x640
[  146.782810][ T7944]  ? vprintk_func+0x8d/0x140
[  146.787412][ T7944]  kcsan_report.cold+0xc/0xd
[  146.792002][ T7944]  kcsan_setup_watchpoint+0x3fe/0x460
[  146.797377][ T7944]  __tsan_unaligned_write8+0xc7/0x110
[  146.802740][ T7944]  handle_mm_fault+0x4a/0x530
[  146.807414][ T7944]  __do_page_fault+0x456/0x8d0
[  146.812175][ T7944]  do_page_fault+0x38/0x194
[  146.816673][ T7944]  page_fault+0x34/0x40
[  146.820819][ T7944] RIP: 0033:0x41d490
[  146.824710][ T7944] Code: 01 44 0f b6 0b 49 89 ca 44 89 c1 41 d3 e9 48 83 ff 08 74 0b 41 0f ba e1 04 0f 83 db 00 00 00 41 0f ba e1 00 73 b1 4c 8d 0c 37 <4d> 8b 09 4d 85 c9 74 a5 4c 39 c8 77 a0 49 39 d1 73 9b 4d 89 cb 49
[  146.844308][ T7944] RSP: 002b:00007ffe3709f420 EFLAGS: 00010293
[  146.850366][ T7944] RAX: 000000c420000000 RBX: 000000c41f8e17f3 RCX: 0000000000000000
[  146.858467][ T7944] RDX: 000000c430ee0000 RSI: 000000c42e3d0180 RDI: 0000000000000000
[  146.866439][ T7944] RBP: 00007ffe3709f4b8 R08: 0000000000000000 R09: 000000c42e3d0180
[  146.874404][ T7944] R10: 0000000000000040 R11: 000000c42e3d0180 R12: 0000000000000001
[  146.882634][ T7944] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000001
[  146.892518][ T7944] Kernel Offset: disabled
[  146.896846][ T7944] Rebooting in 86400 seconds..