[  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 '10.128.0.96' (ECDSA) to the list of known hosts.
2020/05/07 11:05:54 fuzzer started
2020/05/07 11:05:54 dialing manager at 10.128.0.105:43951
2020/05/07 11:06:01 syscalls: 2965
2020/05/07 11:06:01 code coverage: enabled
2020/05/07 11:06:01 comparison tracing: enabled
2020/05/07 11:06:01 extra coverage: enabled
2020/05/07 11:06:01 setuid sandbox: enabled
2020/05/07 11:06:01 namespace sandbox: enabled
2020/05/07 11:06:01 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/07 11:06:01 fault injection: enabled
2020/05/07 11:06:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/07 11:06:01 net packet injection: enabled
2020/05/07 11:06:01 net device setup: enabled
2020/05/07 11:06:01 concurrency sanitizer: enabled
2020/05/07 11:06:01 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/07 11:06:01 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   52.546797][ T6694] KCSAN: could not find function: 'poll_schedule_timeout'
[   53.710462][ T6694] KCSAN: could not find function: '_find_next_bit'
2020/05/07 11:06:04 adding functions to KCSAN blacklist: 'copy_process' 'find_get_pages_range_tag' 'add_timer' 'do_nanosleep' 'echo_char' 'dd_has_work' 'poll_schedule_timeout' '__ext4_new_inode' 'run_timer_softirq' 'tick_nohz_idle_stop_tick' 'xas_clear_mark' 'blk_mq_sched_dispatch_requests' 'generic_write_end' 'ep_poll' 'mod_timer' '_find_next_bit' 'atime_needs_update' 'blk_mq_dispatch_rq_list' 
[  118.530272][    T0] ==================================================================
[  118.538768][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[  118.547438][    T0] 
[  118.549800][    T0] write to 0xffffffff85f0ef50 of 4 bytes by interrupt on cpu 1:
[  118.557867][    T0]  tick_sched_do_timer+0xb4/0xd0
[  118.563430][    T0]  tick_sched_timer+0x3f/0xd0
[  118.568316][    T0]  __hrtimer_run_queues+0x271/0x600
[  118.573546][    T0]  hrtimer_interrupt+0x226/0x490
[  118.578577][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[  118.584231][    T0]  apic_timer_interrupt+0xf/0x20
[  118.589165][    T0]  tcp_recvmsg+0x0/0x1ba0
[  118.593895][    T0]  inet_recvmsg+0xc1/0x250
[  118.598609][    T0]  sock_recvmsg+0x8e/0xb0
[  118.603095][    T0]  sock_read_iter+0x185/0x230
[  118.608041][    T0]  new_sync_read+0x416/0x450
[  118.612979][    T0]  __vfs_read+0x9e/0xb0
[  118.619059][    T0]  vfs_read+0x13e/0x2b0
[  118.623886][    T0]  ksys_read+0x16a/0x1a0
[  118.628581][    T0]  __x64_sys_read+0x49/0x60
[  118.633348][    T0]  do_syscall_64+0xc7/0x3b0
[  118.637852][    T0]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  118.644075][    T0] 
[  118.646407][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  118.654488][    T0]  tick_nohz_next_event+0x181/0x340
[  118.661491][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  118.667261][    T0]  do_idle+0x1ad/0x290
[  118.671895][    T0]  cpu_startup_entry+0x14/0x20
[  118.676755][    T0]  rest_init+0xe4/0xeb
[  118.681111][    T0]  arch_call_rest_init+0x13/0x2b
[  118.687716][    T0]  start_kernel+0x82d/0x852
[  118.692331][    T0]  secondary_startup_64+0xa4/0xb0
[  118.698407][    T0] 
[  118.700858][    T0] Reported by Kernel Concurrency Sanitizer on:
[  118.708109][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  118.716165][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  118.726215][    T0] ==================================================================
[  118.734452][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  118.741040][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  118.749353][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  118.759750][    T0] Call Trace:
[  118.763043][    T0]  dump_stack+0x11d/0x187
[  118.767377][    T0]  panic+0x210/0x640
[  118.771269][    T0]  ? vprintk_func+0x89/0x13a
[  118.775859][    T0]  kcsan_report.cold+0xc/0x1a
[  118.780536][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  118.785884][    T0]  tick_nohz_next_event+0x181/0x340
[  118.791061][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  118.797885][    T0]  ? ktime_get+0x1c9/0x210
[  118.802309][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  118.808024][    T0]  do_idle+0x1ad/0x290
[  118.812175][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  118.817660][    T0]  cpu_startup_entry+0x14/0x20
[  118.822423][    T0]  rest_init+0xe4/0xeb
[  118.826474][    T0]  arch_call_rest_init+0x13/0x2b
[  118.832007][    T0]  start_kernel+0x82d/0x852
[  118.836773][    T0]  secondary_startup_64+0xa4/0xb0
[  118.844501][    T0] Kernel Offset: disabled
[  118.848856][    T0] Rebooting in 86400 seconds..