[  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 '10.128.0.63' (ECDSA) to the list of known hosts.
2020/04/29 23:02:41 fuzzer started
2020/04/29 23:02:42 dialing manager at 10.128.0.105:39627
2020/04/29 23:02:53 syscalls: 2964
2020/04/29 23:02:53 code coverage: enabled
2020/04/29 23:02:53 comparison tracing: enabled
2020/04/29 23:02:53 extra coverage: enabled
2020/04/29 23:02:53 setuid sandbox: enabled
2020/04/29 23:02:53 namespace sandbox: enabled
2020/04/29 23:02:53 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/29 23:02:53 fault injection: enabled
2020/04/29 23:02:53 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/29 23:02:53 net packet injection: enabled
2020/04/29 23:02:53 net device setup: enabled
2020/04/29 23:02:53 concurrency sanitizer: enabled
2020/04/29 23:02:53 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/29 23:02:53 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   56.755582][ T6729] KCSAN: could not find function: '_find_next_bit'
2020/04/29 23:02:55 adding functions to KCSAN blacklist: 'find_get_pages_range_tag' '__ext4_new_inode' 'page_counter_charge' 'blk_mq_dispatch_rq_list' 'ext4_mark_iloc_dirty' 'xas_clear_mark' 'mod_timer' 'do_exit' '_find_next_bit' 'ext4_da_write_end' '__do_page_cache_readahead' 'do_nanosleep' 'add_timer' 'ep_poll' 'generic_write_end' 'run_timer_softirq' 'blk_mq_get_request' 'tick_nohz_idle_stop_tick' 'kauditd_thread' 'copy_process' 
[   60.016874][    T0] ==================================================================
[   60.025091][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   60.033229][    T0] 
[   60.035568][    T0] write to 0xffffffff85f0ef50 of 4 bytes by interrupt on cpu 1:
[   60.045558][    T0]  tick_sched_do_timer+0xb4/0xd0
[   60.050501][    T0]  tick_sched_timer+0x3f/0xd0
[   60.055191][    T0]  __hrtimer_run_queues+0x271/0x600
[   60.060490][    T0]  hrtimer_interrupt+0x226/0x490
[   60.065427][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   60.070878][    T0]  apic_timer_interrupt+0xf/0x20
[   60.076070][    T0]  ip_vs_out+0x5e2/0xce0
[   60.080308][    T0]  ip_vs_reply4+0x52/0x70
[   60.084634][    T0]  ip_vs_local_reply4+0x2b/0x3c
[   60.089474][    T0]  nf_hook_slow+0x7c/0x160
[   60.094079][    T0]  __ip_local_out+0x1f3/0x2b0
[   60.098739][    T0]  ip_local_out+0x2d/0x90
[   60.103050][    T0]  __ip_queue_xmit+0x3a6/0xa40
[   60.108750][    T0]  ip_queue_xmit+0x3e/0x50
[   60.113158][    T0]  __tcp_transmit_skb+0xe0f/0x1c80
[   60.118352][    T0]  __tcp_send_ack+0x22c/0x2f0
[   60.123010][    T0]  tcp_send_ack+0x2d/0x40
[   60.127329][    T0]  tcp_cleanup_rbuf+0x124/0x340
[   60.132264][    T0]  tcp_recvmsg+0x686/0x1ba0
[   60.136770][    T0]  inet_recvmsg+0xc1/0x250
[   60.141177][    T0]  sock_recvmsg+0x8e/0xb0
[   60.145505][    T0]  sock_read_iter+0x185/0x230
[   60.150223][    T0]  new_sync_read+0x416/0x450
[   60.154793][    T0]  __vfs_read+0x9e/0xb0
[   60.158941][    T0]  vfs_read+0x13e/0x2b0
[   60.163230][    T0]  ksys_read+0x16a/0x1a0
[   60.167451][    T0]  __x64_sys_read+0x49/0x60
[   60.172037][    T0]  do_syscall_64+0xc7/0x3b0
[   60.176517][    T0]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   60.182549][    T0] 
[   60.184868][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[   60.192379][    T0]  tick_nohz_next_event+0x181/0x340
[   60.197571][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   60.203180][    T0]  do_idle+0x1ad/0x290
[   60.207902][    T0]  cpu_startup_entry+0x14/0x20
[   60.212853][    T0]  rest_init+0xe4/0xeb
[   60.216899][    T0]  arch_call_rest_init+0x13/0x2b
[   60.222009][    T0]  start_kernel+0x82d/0x852
[   60.226502][    T0]  secondary_startup_64+0xa4/0xb0
[   60.231768][    T0] 
[   60.234256][    T0] Reported by Kernel Concurrency Sanitizer on:
[   60.240856][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   60.248716][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.258771][    T0] ==================================================================
[   60.267867][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   60.274548][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   60.283129][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.293351][    T0] Call Trace:
[   60.296631][    T0]  dump_stack+0x11d/0x187
[   60.300957][    T0]  panic+0x210/0x640
[   60.304847][    T0]  ? vprintk_func+0x89/0x13a
[   60.309418][    T0]  kcsan_report.cold+0xc/0x1a
[   60.314090][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   60.320694][    T0]  tick_nohz_next_event+0x181/0x340
[   60.326613][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   60.332170][    T0]  ? ktime_get+0x1c9/0x210
[   60.336928][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   60.343135][    T0]  do_idle+0x1ad/0x290
[   60.348451][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   60.354275][    T0]  cpu_startup_entry+0x14/0x20
[   60.359375][    T0]  rest_init+0xe4/0xeb
[   60.363671][    T0]  arch_call_rest_init+0x13/0x2b
[   60.369485][    T0]  start_kernel+0x82d/0x852
[   60.373991][    T0]  secondary_startup_64+0xa4/0xb0
[   60.380520][    T0] Kernel Offset: disabled
[   60.384960][    T0] Rebooting in 86400 seconds..