[  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 '10.128.0.158' (ECDSA) to the list of known hosts.
2020/04/30 11:18:24 fuzzer started
2020/04/30 11:18:24 dialing manager at 10.128.0.105:33453
2020/04/30 11:18:29 syscalls: 2964
2020/04/30 11:18:29 code coverage: enabled
2020/04/30 11:18:29 comparison tracing: enabled
2020/04/30 11:18:29 extra coverage: enabled
2020/04/30 11:18:29 setuid sandbox: enabled
2020/04/30 11:18:29 namespace sandbox: enabled
2020/04/30 11:18:29 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/30 11:18:29 fault injection: enabled
2020/04/30 11:18:29 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/30 11:18:29 net packet injection: enabled
2020/04/30 11:18:29 net device setup: enabled
2020/04/30 11:18:29 concurrency sanitizer: enabled
2020/04/30 11:18:29 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/30 11:18:29 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   51.178142][ T6726] KCSAN: could not find function: '_find_next_bit'
2020/04/30 11:18:32 adding functions to KCSAN blacklist: 'ext4_mark_iloc_dirty' 'blk_mq_get_request' 'add_timer' '__filemap_fdatawrite_range' 'mod_timer' '__writeback_single_inode' 'tick_sched_do_timer' '__delete_from_page_cache' '__ext4_new_inode' 'ep_poll' 'find_get_pages_range_tag' 'xas_clear_mark' 'pcpu_alloc' '_find_next_bit' 'run_timer_softirq' 'blk_mq_request_bypass_insert' 'echo_char' 'blk_mq_sched_dispatch_requests' 'page_counter_charge' 'generic_write_end' 'copy_process' 'do_nanosleep' 
[  104.077414][    T0] ==================================================================
[  104.085640][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  104.094232][    T0] 
[  104.096551][    T0] write to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  104.104210][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  104.110448][    T0]  do_idle+0x1ad/0x290
[  104.114529][    T0]  cpu_startup_entry+0x14/0x20
[  104.119291][    T0]  rest_init+0xe4/0xeb
[  104.123550][    T0]  arch_call_rest_init+0x13/0x2b
[  104.129002][    T0]  start_kernel+0x82d/0x852
[  104.133529][    T0]  secondary_startup_64+0xa4/0xb0
[  104.138528][    T0] 
[  104.140933][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[  104.148216][    T0]  tick_nohz_next_event+0x181/0x340
[  104.153409][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  104.159417][    T0]  do_idle+0x1ad/0x290
[  104.163477][    T0]  cpu_startup_entry+0x14/0x20
[  104.168321][    T0]  start_secondary+0x169/0x1b0
[  104.173069][    T0]  secondary_startup_64+0xa4/0xb0
[  104.178199][    T0] 
[  104.180507][    T0] Reported by Kernel Concurrency Sanitizer on:
[  104.186656][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  104.194533][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  104.204567][    T0] ==================================================================
[  104.212828][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  104.219766][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  104.227672][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  104.237858][    T0] Call Trace:
[  104.241137][    T0]  dump_stack+0x11d/0x187
[  104.245457][    T0]  panic+0x210/0x640
[  104.249351][    T0]  ? vprintk_func+0x89/0x13a
[  104.254065][    T0]  kcsan_report.cold+0xc/0x1a
[  104.258734][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  104.264090][    T0]  tick_nohz_next_event+0x181/0x340
[  104.270319][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  104.275869][    T0]  ? ktime_get+0x1c9/0x210
[  104.280422][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  104.285873][    T0]  do_idle+0x1ad/0x290
[  104.289934][    T0]  cpu_startup_entry+0x14/0x20
[  104.295829][    T0]  start_secondary+0x169/0x1b0
[  104.300601][    T0]  secondary_startup_64+0xa4/0xb0
[  104.307033][    T0] Kernel Offset: disabled
[  104.311522][    T0] Rebooting in 86400 seconds..