[  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

Warning: Permanently added '10.128.0.74' (ECDSA) to the list of known hosts.
2020/04/16 06:52:35 fuzzer started
syzkaller login: [   44.015670][ T6723] cc1 (6723) used greatest stack depth: 10440 bytes left
2020/04/16 06:52:37 dialing manager at 10.128.0.105:38905
2020/04/16 06:52:46 syscalls: 2960
2020/04/16 06:52:46 code coverage: enabled
2020/04/16 06:52:46 comparison tracing: enabled
2020/04/16 06:52:46 extra coverage: enabled
2020/04/16 06:52:46 setuid sandbox: enabled
2020/04/16 06:52:46 namespace sandbox: enabled
2020/04/16 06:52:46 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/16 06:52:46 fault injection: enabled
2020/04/16 06:52:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/16 06:52:46 net packet injection: enabled
2020/04/16 06:52:46 net device setup: enabled
2020/04/16 06:52:46 concurrency sanitizer: enabled
2020/04/16 06:52:46 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/16 06:52:46 USB emulation: /dev/raw-gadget does not exist
[   55.178923][ T6733] KCSAN: could not find function: '_find_next_bit'
2020/04/16 06:52:49 adding functions to KCSAN blacklist: 'page_counter_charge' 'run_timer_softirq' '_find_next_bit' 'blk_mq_sched_dispatch_requests' '__snd_rawmidi_transmit_ack' 'ext4_free_inodes_count' 'kauditd_thread' 'ep_poll' 'find_get_pages_range_tag' 'add_timer' 'do_nanosleep' '__process_echoes' 'ext4_ext_try_to_merge_right' '__ext4_new_inode' 'xas_clear_mark' 'pcpu_alloc' 'generic_write_end' 'echo_char' 'copy_process' 'generic_fillattr' 'mod_timer' 
[  168.736638][    T0] ==================================================================
[  168.745614][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[  168.754142][    T0] 
[  168.756831][    T0] write to 0xffffffff85f0ef50 of 4 bytes by interrupt on cpu 1:
[  168.764944][    T0]  tick_sched_do_timer+0xb4/0xd0
[  168.770401][    T0]  tick_sched_timer+0x3f/0xd0
[  168.775844][    T0]  __hrtimer_run_queues+0x271/0x600
[  168.781215][    T0]  hrtimer_interrupt+0x226/0x490
[  168.786386][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[  168.792501][    T0]  apic_timer_interrupt+0xf/0x20
[  168.797429][    T0] 
[  168.799754][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  168.807032][    T0]  tick_nohz_next_event+0x181/0x340
[  168.812237][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  168.818027][    T0]  do_idle+0x1ad/0x290
[  168.822494][    T0]  cpu_startup_entry+0x14/0x20
[  168.827310][    T0]  rest_init+0xe4/0xeb
[  168.831599][    T0]  arch_call_rest_init+0x13/0x2b
[  168.837075][    T0]  start_kernel+0x82d/0x852
[  168.841694][    T0]  secondary_startup_64+0xa4/0xb0
[  168.846746][    T0] 
[  168.849063][    T0] Reported by Kernel Concurrency Sanitizer on:
[  168.855386][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  168.863516][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  168.873561][    T0] ==================================================================
[  168.881611][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  168.888545][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  168.897075][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  168.907254][    T0] Call Trace:
[  168.910553][    T0]  dump_stack+0x11d/0x187
[  168.914880][    T0]  panic+0x210/0x640
[  168.918914][    T0]  ? vprintk_func+0x89/0x13a
[  168.923511][    T0]  kcsan_report.cold+0xc/0x1a
[  168.928283][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  168.933949][    T0]  tick_nohz_next_event+0x181/0x340
[  168.939347][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  168.944894][    T0]  ? ktime_get+0x1c9/0x210
[  168.949594][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  168.955056][    T0]  do_idle+0x1ad/0x290
[  168.959279][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  168.964893][    T0]  cpu_startup_entry+0x14/0x20
[  168.970266][    T0]  rest_init+0xe4/0xeb
[  168.975197][    T0]  arch_call_rest_init+0x13/0x2b
[  168.980716][    T0]  start_kernel+0x82d/0x852
[  168.985459][    T0]  secondary_startup_64+0xa4/0xb0
[  168.992476][    T0] Kernel Offset: disabled
[  168.996974][    T0] Rebooting in 86400 seconds..