[   40.280573][   T27] audit: type=1800 audit(1583407774.265:21): pid=7535 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   40.326566][   T27] audit: type=1800 audit(1583407774.265:22): pid=7535 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0
[   40.361314][   T27] audit: type=1800 audit(1583407774.275:23): pid=7535 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 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 '10.128.0.52' (ECDSA) to the list of known hosts.
2020/03/05 11:29:45 fuzzer started
2020/03/05 11:29:47 dialing manager at 10.128.0.105:44099
2020/03/05 11:29:52 syscalls: 2955
2020/03/05 11:29:52 code coverage: enabled
2020/03/05 11:29:52 comparison tracing: enabled
2020/03/05 11:29:52 extra coverage: enabled
2020/03/05 11:29:52 setuid sandbox: enabled
2020/03/05 11:29:52 namespace sandbox: enabled
2020/03/05 11:29:52 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/05 11:29:52 fault injection: enabled
2020/03/05 11:29:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/05 11:29:52 net packet injection: enabled
2020/03/05 11:29:52 net device setup: enabled
2020/03/05 11:29:52 concurrency sanitizer: enabled
2020/03/05 11:29:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   59.982519][ T7703] KCSAN: could not find function: '_find_next_bit'
2020/03/05 11:29:55 adding functions to KCSAN blacklist: 'page_counter_try_charge' 'ktime_get_real_seconds' 'copy_process' 'blk_mq_get_request' 'do_syslog' 'ep_poll' 'generic_write_end' 'dd_has_work' 'find_get_pages_range_tag' 'blk_mq_dispatch_rq_list' '_find_next_bit' 'tick_nohz_idle_stop_tick' 'ext4_has_free_clusters' '__ext4_new_inode' 'do_nanosleep' 'xas_clear_mark' 'run_timer_softirq' 'generic_fillattr' 'shmem_file_read_iter' 
[   94.173997][    T0] ==================================================================
[   94.182158][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   94.190300][    T0] 
[   94.192638][    T0] write to 0xffffffff85d05610 of 4 bytes by interrupt on cpu 0:
[   94.200329][    T0]  tick_sched_do_timer+0xb4/0xd0
[   94.205247][    T0]  tick_sched_timer+0x3f/0xd0
[   94.209899][    T0]  __hrtimer_run_queues+0x271/0x600
[   94.215078][    T0]  hrtimer_interrupt+0x226/0x490
[   94.220014][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   94.225453][    T0]  apic_timer_interrupt+0xf/0x20
[   94.230379][    T0] 
[   94.232691][    T0] read to 0xffffffff85d05610 of 4 bytes by task 0 on cpu 1:
[   94.239955][    T0]  tick_nohz_next_event+0x192/0x350
[   94.245147][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   94.250673][    T0]  do_idle+0x1ad/0x290
[   94.254725][    T0]  cpu_startup_entry+0x14/0x20
[   94.259477][    T0]  start_secondary+0x164/0x1b0
[   94.264223][    T0]  secondary_startup_64+0xa4/0xb0
[   94.269307][    T0] 
[   94.271612][    T0] Reported by Kernel Concurrency Sanitizer on:
[   94.277745][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   94.285607][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.295643][    T0] ==================================================================
[   94.303680][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   94.310251][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   94.318115][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.328146][    T0] Call Trace:
[   94.331438][    T0]  dump_stack+0x11d/0x187
[   94.335751][    T0]  panic+0x210/0x640
[   94.339630][    T0]  ? vprintk_func+0x89/0x13a
[   94.344202][    T0]  kcsan_report.cold+0xc/0x14
[   94.348863][    T0]  kcsan_setup_watchpoint+0x304/0x400
[   94.354231][    T0]  tick_nohz_next_event+0x192/0x350
[   94.359427][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   94.364952][    T0]  ? ktime_get+0x1c9/0x210
[   94.369354][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   94.374793][    T0]  do_idle+0x1ad/0x290
[   94.378843][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   94.384284][    T0]  cpu_startup_entry+0x14/0x20
[   94.389029][    T0]  start_secondary+0x164/0x1b0
[   94.393776][    T0]  secondary_startup_64+0xa4/0xb0
[   94.400082][    T0] Kernel Offset: disabled
[   94.404407][    T0] Rebooting in 86400 seconds..