[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts.
2020/05/29 14:56:42 fuzzer started
2020/05/29 14:56:42 dialing manager at 10.128.0.105:37521
2020/05/29 14:56:52 syscalls: 3055
2020/05/29 14:56:52 code coverage: enabled
2020/05/29 14:56:52 comparison tracing: enabled
2020/05/29 14:56:52 extra coverage: enabled
2020/05/29 14:56:52 setuid sandbox: enabled
2020/05/29 14:56:52 namespace sandbox: enabled
2020/05/29 14:56:52 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/29 14:56:52 fault injection: enabled
2020/05/29 14:56:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/29 14:56:52 net packet injection: enabled
2020/05/29 14:56:52 net device setup: enabled
2020/05/29 14:56:52 concurrency sanitizer: enabled
2020/05/29 14:56:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/29 14:56:52 USB emulation: enabled
syzkaller login: [ 59.796321][ T8918] KCSAN: could not find function: '_find_next_bit'
2020/05/29 14:56:55 adding functions to KCSAN blacklist: 'do_nanosleep' 'pcpu_alloc' 'generic_fillattr' 'ext4_free_inodes_count' 'mod_timer' 'ext4_mb_good_group' 'file_update_time' 'tick_nohz_next_event' 'add_timer' '_find_next_bit' 'ep_poll' 'generic_write_end' 'kauditd_thread' 'copy_process' 'n_tty_receive_buf_common' 'tick_nohz_idle_stop_tick' 'futex_wait_queue_me' 'page_counter_charge' 'find_get_pages_range_tag' 'xas_clear_mark' '__ext4_new_inode' 'blk_mq_dispatch_rq_list'
[ 141.254030][ C0] ==================================================================
[ 141.262286][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 141.270535][ C0]
[ 141.272868][ C0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 141.280660][ C0] tick_sched_do_timer+0xb4/0xd0
[ 141.285591][ C0] tick_sched_timer+0x3f/0xd0
[ 141.290259][ C0] __hrtimer_run_queues+0x271/0x600
[ 141.295558][ C0] hrtimer_interrupt+0x226/0x490
[ 141.300494][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 141.306393][ C0] apic_timer_interrupt+0xf/0x20
[ 141.311877][ C0]
[ 141.314214][ C0] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[ 141.321992][ C0] tick_sched_do_timer+0x2e/0xd0
[ 141.327310][ C0] tick_sched_timer+0x3f/0xd0
[ 141.332081][ C0] __hrtimer_run_queues+0x271/0x600
[ 141.337256][ C0] hrtimer_interrupt+0x226/0x490
[ 141.342173][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 141.347695][ C0] apic_timer_interrupt+0xf/0x20
[ 141.352618][ C0] native_safe_halt+0xe/0x10
[ 141.357297][ C0] default_idle+0x21/0x170
[ 141.361698][ C0] do_idle+0x1b7/0x290
[ 141.365763][ C0] cpu_startup_entry+0x14/0x20
[ 141.370516][ C0] rest_init+0xe4/0xeb
[ 141.374697][ C0] arch_call_rest_init+0x13/0x2b
[ 141.379629][ C0] start_kernel+0x7fe/0x823
[ 141.384214][ C0] secondary_startup_64+0xa4/0xb0
[ 141.389247][ C0]
[ 141.391679][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 141.397819][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 141.405697][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 141.415727][ C0] ==================================================================
[ 141.424213][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 141.430779][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 141.438642][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 141.448765][ C0] Call Trace:
[ 141.452036][ C0]
[ 141.454878][ C0] dump_stack+0x11d/0x187
[ 141.459199][ C0] panic+0x210/0x640
[ 141.463074][ C0] ? vprintk_func+0x89/0x13a
[ 141.467660][ C0] kcsan_report.cold+0xc/0x1a
[ 141.472318][ C0] kcsan_setup_watchpoint+0x3fb/0x440
[ 141.477708][ C0] tick_sched_do_timer+0x2e/0xd0
[ 141.482623][ C0] tick_sched_timer+0x3f/0xd0
[ 141.487298][ C0] __hrtimer_run_queues+0x271/0x600
[ 141.492563][ C0] ? tick_sched_do_timer+0xd0/0xd0
[ 141.497669][ C0] hrtimer_interrupt+0x226/0x490
[ 141.502599][ C0] ? kvm_clock_read+0x14/0x30
[ 141.507269][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 141.512933][ C0] apic_timer_interrupt+0xf/0x20
[ 141.518112][ C0]
[ 141.521081][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 141.526450][ C0] Code: ff cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 0c d6 58 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d fc d5 58 00 fb f4 cc 41 54 55 53 e8 97 b2 71 fb e8 a2 21 bc fc 0f 1f 44 00 00 48
[ 141.546246][ C0] RSP: 0018:ffffffff87203e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 141.554863][ C0] RAX: 0000000000000000 RBX: ffffffff8722b840 RCX: ffffffff8285fdf1
[ 141.562840][ C0] RDX: 0000000000000000 RSI: ffffffff8285fdfa RDI: 0000000000000005
[ 141.570978][ C0] RBP: 0000000000000000 R08: ffffffff8722b840 R09: 0000ffff87047920
[ 141.580191][ C0] R10: 0000ffff87203e58 R11: 0000ffff87047927 R12: ffffffff8722b840
[ 141.588254][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8722b840
[ 141.596403][ C0] ? debug_smp_processor_id+0x31/0x129
[ 141.601930][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 141.607372][ C0] default_idle+0x21/0x170
[ 141.611801][ C0] do_idle+0x1b7/0x290
[ 141.615848][ C0] ? debug_smp_processor_id+0x3f/0x129
[ 141.621331][ C0] cpu_startup_entry+0x14/0x20
[ 141.626089][ C0] rest_init+0xe4/0xeb
[ 141.630260][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[ 141.636502][ C0] arch_call_rest_init+0x13/0x2b
[ 141.641524][ C0] start_kernel+0x7fe/0x823
[ 141.646042][ C0] secondary_startup_64+0xa4/0xb0
[ 141.652417][ C0] Kernel Offset: disabled
[ 141.656753][ C0] Rebooting in 86400 seconds..