[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

syzkaller login: [   43.588360][ T8856] sshd (8856) used greatest stack depth: 10456 bytes left
Warning: Permanently added '10.128.0.190' (ECDSA) to the list of known hosts.
2020/06/18 12:46:01 fuzzer started
2020/06/18 12:46:01 dialing manager at 10.128.0.105:34299
2020/06/18 12:46:03 syscalls: 3089
2020/06/18 12:46:03 code coverage: enabled
2020/06/18 12:46:03 comparison tracing: enabled
2020/06/18 12:46:03 extra coverage: enabled
2020/06/18 12:46:03 setuid sandbox: enabled
2020/06/18 12:46:03 namespace sandbox: enabled
2020/06/18 12:46:03 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/18 12:46:03 fault injection: enabled
2020/06/18 12:46:03 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/18 12:46:03 net packet injection: enabled
2020/06/18 12:46:03 net device setup: enabled
2020/06/18 12:46:03 concurrency sanitizer: enabled
2020/06/18 12:46:03 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/18 12:46:03 USB emulation: enabled
[   54.331929][ T8898] KCSAN: could not find function: '_find_next_bit'
2020/06/18 12:46:04 suppressing KCSAN reports in functions: '__ext4_new_inode' 'run_timer_softirq' 'ext4_mark_iloc_dirty' '_find_next_bit' 'ep_poll' 'blk_mq_get_request' 
[   66.707769][    T0] ==================================================================
[   66.715895][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   66.724058][    T0] 
[   66.726381][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   66.734181][    T0]  tick_sched_do_timer+0xb4/0xd0
[   66.739124][    T0]  tick_sched_timer+0x3f/0xd0
[   66.743824][    T0]  __hrtimer_run_queues+0x271/0x600
[   66.749010][    T0]  hrtimer_interrupt+0x226/0x490
[   66.754046][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   66.759486][    T0]  apic_timer_interrupt+0xf/0x20
[   66.764406][    T0] 
[   66.766715][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   66.774936][    T0]  tick_nohz_next_event+0x181/0x340
[   66.780118][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   66.785640][    T0]  do_idle+0x1ad/0x290
[   66.789881][    T0]  cpu_startup_entry+0x14/0x20
[   66.794638][    T0]  start_secondary+0x169/0x1b0
[   66.800424][    T0]  secondary_startup_64+0xa4/0xb0
[   66.805417][    T0] 
[   66.807724][    T0] Reported by Kernel Concurrency Sanitizer on:
[   66.813855][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   66.821735][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.831791][    T0] ==================================================================
[   66.839839][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   66.846422][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   66.854319][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.865322][    T0] Call Trace:
[   66.868610][    T0]  dump_stack+0x11d/0x187
[   66.877302][    T0]  panic+0x210/0x640
[   66.882241][    T0]  ? vprintk_func+0x89/0x13a
[   66.886928][    T0]  kcsan_report.cold+0xc/0x1a
[   66.891605][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   66.896983][    T0]  tick_nohz_next_event+0x181/0x340
[   66.902169][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   66.907706][    T0]  ? ktime_get+0x1c9/0x210
[   66.912127][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   66.917629][    T0]  do_idle+0x1ad/0x290
[   66.921694][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   66.927142][    T0]  cpu_startup_entry+0x14/0x20
[   66.931906][    T0]  start_secondary+0x169/0x1b0
[   66.936668][    T0]  secondary_startup_64+0xa4/0xb0
[   66.942984][    T0] Kernel Offset: disabled
[   66.947417][    T0] Rebooting in 86400 seconds..