[info] Using makefile-style concurrent boot in runlevel 2.
[   45.997126][   T26] audit: type=1800 audit(1582683348.684:21): pid=7798 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   46.046927][   T26] audit: type=1800 audit(1582683348.684:22): pid=7798 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 '10.128.1.23' (ECDSA) to the list of known hosts.
2020/02/26 02:15:57 fuzzer started
2020/02/26 02:15:58 dialing manager at 10.128.0.105:41211
2020/02/26 02:15:58 syscalls: 2955
2020/02/26 02:15:58 code coverage: enabled
2020/02/26 02:15:58 comparison tracing: enabled
2020/02/26 02:15:58 extra coverage: enabled
2020/02/26 02:15:58 setuid sandbox: enabled
2020/02/26 02:15:58 namespace sandbox: enabled
2020/02/26 02:15:58 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/26 02:15:58 fault injection: enabled
2020/02/26 02:15:58 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/26 02:15:58 net packet injection: enabled
2020/02/26 02:15:58 net device setup: enabled
2020/02/26 02:15:58 concurrency sanitizer: enabled
2020/02/26 02:15:58 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   56.804136][ T7962] KCSAN: could not find function: '_find_next_bit'
2020/02/26 02:16:00 adding functions to KCSAN blacklist: 'padata_find_next' '_find_next_bit' 'ext4_nonda_switch' '__ext4_new_inode' 'blk_mq_dispatch_rq_list' 'generic_write_end' 'copy_process' 'generic_file_read_iter' 'find_get_pages_range_tag' 'ep_poll' 'pcpu_alloc' 'ext4_has_free_clusters' 
[   71.485714][    T0] ==================================================================
[   71.493900][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   71.502485][    T0] 
[   71.504808][    T0] write to 0xffffffff85f05590 of 4 bytes by interrupt on cpu 1:
[   71.512556][    T0]  tick_sched_do_timer+0xc0/0xe0
[   71.517495][    T0]  tick_sched_timer+0x43/0xe0
[   71.522163][    T0]  __hrtimer_run_queues+0x274/0x5f0
[   71.527378][    T0]  hrtimer_interrupt+0x22a/0x480
[   71.532324][    T0]  smp_apic_timer_interrupt+0xdc/0x280
[   71.537792][    T0]  apic_timer_interrupt+0xf/0x20
[   71.542724][    T0] 
[   71.545052][    T0] read to 0xffffffff85f05590 of 4 bytes by task 0 on cpu 0:
[   71.552341][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   71.557895][    T0]  do_idle+0x1b8/0x290
[   71.561967][    T0]  cpu_startup_entry+0x1b/0x20
[   71.566744][    T0]  rest_init+0xec/0xf6
[   71.570821][    T0]  arch_call_rest_init+0x17/0x37
[   71.575761][    T0]  start_kernel+0xcd4/0xcfc
[   71.580274][    T0]  x86_64_start_reservations+0x29/0x2b
[   71.585730][    T0]  x86_64_start_kernel+0x72/0x76
[   71.590676][    T0]  secondary_startup_64+0xa4/0xb0
[   71.595749][    T0] 
[   71.598065][    T0] Reported by Kernel Concurrency Sanitizer on:
[   71.604236][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   71.612184][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   71.622368][    T0] ==================================================================
[   71.630422][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   71.637248][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   71.645131][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   71.655468][    T0] Call Trace:
[   71.658773][    T0]  dump_stack+0x11d/0x181
[   71.663116][    T0]  panic+0x210/0x640
[   71.667029][    T0]  ? vprintk_func+0x8d/0x140
[   71.671627][    T0]  kcsan_report.cold+0xc/0x1a
[   71.676322][    T0]  kcsan_setup_watchpoint+0x307/0x400
[   71.681703][    T0]  __tsan_read4+0xc6/0x100
[   71.686127][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   71.691693][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   71.697940][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   71.704176][    T0]  do_idle+0x1b8/0x290
[   71.708259][    T0]  cpu_startup_entry+0x1b/0x20
[   71.713041][    T0]  rest_init+0xec/0xf6
[   71.717145][    T0]  arch_call_rest_init+0x17/0x37
[   71.722087][    T0]  start_kernel+0xcd4/0xcfc
[   71.726725][    T0]  x86_64_start_reservations+0x29/0x2b
[   71.732191][    T0]  x86_64_start_kernel+0x72/0x76
[   71.737140][    T0]  secondary_startup_64+0xa4/0xb0
[   71.743330][    T0] Kernel Offset: disabled
[   71.747665][    T0] Rebooting in 86400 seconds..