[[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 '10.128.0.212' (ECDSA) to the list of known hosts.
2020/06/05 13:46:05 fuzzer started
2020/06/05 13:46:06 dialing manager at 10.128.0.105:41441
2020/06/05 13:46:11 syscalls: 3055
2020/06/05 13:46:11 code coverage: enabled
2020/06/05 13:46:11 comparison tracing: enabled
2020/06/05 13:46:11 extra coverage: enabled
2020/06/05 13:46:11 setuid sandbox: enabled
2020/06/05 13:46:11 namespace sandbox: enabled
2020/06/05 13:46:11 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/05 13:46:11 fault injection: enabled
2020/06/05 13:46:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/05 13:46:11 net packet injection: enabled
2020/06/05 13:46:11 net device setup: enabled
2020/06/05 13:46:11 concurrency sanitizer: enabled
2020/06/05 13:46:11 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/05 13:46:11 USB emulation: enabled
syzkaller login: [ 55.494980][ T8921] KCSAN: could not find function: '_find_next_bit'
2020/06/05 13:46:13 adding functions to KCSAN blacklist: 'file_update_time' 'blk_mq_get_request' 'page_counter_charge' '_find_next_bit' 'ep_poll' 'run_timer_softirq' 'generic_write_end' 'do_nanosleep' '__ext4_new_inode' 'find_get_pages_range_tag' 'blk_mq_sched_dispatch_requests' 'futex_wait_queue_me'
[ 95.831661][ C0] ==================================================================
[ 95.839898][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 95.847974][ C0]
[ 95.850308][ C0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 95.857956][ C0] tick_sched_do_timer+0xb4/0xd0
[ 95.862988][ C0] tick_sched_timer+0x3f/0xd0
[ 95.867773][ C0] __hrtimer_run_queues+0x271/0x600
[ 95.873168][ C0] hrtimer_interrupt+0x226/0x490
[ 95.878083][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 95.883530][ C0] apic_timer_interrupt+0xf/0x20
[ 95.888446][ C0]
[ 95.890764][ C0] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[ 95.898401][ C0] tick_sched_do_timer+0x2e/0xd0
[ 95.903321][ C0] tick_sched_timer+0x3f/0xd0
[ 95.907974][ C0] __hrtimer_run_queues+0x271/0x600
[ 95.913145][ C0] hrtimer_interrupt+0x226/0x490
[ 95.918071][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 95.923604][ C0] apic_timer_interrupt+0xf/0x20
[ 95.928520][ C0] native_safe_halt+0xe/0x10
[ 95.933100][ C0] default_idle+0x21/0x170
[ 95.937496][ C0] do_idle+0x1b7/0x290
[ 95.941547][ C0] cpu_startup_entry+0x14/0x20
[ 95.946295][ C0] rest_init+0xe4/0xeb
[ 95.950339][ C0] arch_call_rest_init+0x13/0x2b
[ 95.955285][ C0] start_kernel+0x7fe/0x823
[ 95.959769][ C0] secondary_startup_64+0xa4/0xb0
[ 95.964851][ C0]
[ 95.967154][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 95.973296][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 95.981160][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 95.991380][ C0] ==================================================================
[ 95.999436][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 96.006014][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 96.013875][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 96.026779][ C0] Call Trace:
[ 96.030052][ C0]
[ 96.032891][ C0] dump_stack+0x11d/0x187
[ 96.037735][ C0] panic+0x210/0x640
[ 96.041611][ C0] ? vprintk_func+0x89/0x13a
[ 96.046187][ C0] kcsan_report.cold+0xc/0x1a
[ 96.050843][ C0] kcsan_setup_watchpoint+0x3fb/0x440
[ 96.056193][ C0] tick_sched_do_timer+0x2e/0xd0
[ 96.061174][ C0] tick_sched_timer+0x3f/0xd0
[ 96.065890][ C0] __hrtimer_run_queues+0x271/0x600
[ 96.071070][ C0] ? tick_sched_do_timer+0xd0/0xd0
[ 96.076178][ C0] hrtimer_interrupt+0x226/0x490
[ 96.081112][ C0] ? kvm_clock_read+0x14/0x30
[ 96.085792][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 96.091261][ C0] apic_timer_interrupt+0xf/0x20
[ 96.096179][ C0]
[ 96.099125][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 96.104485][ 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
[ 96.124071][ C0] RSP: 0018:ffffffff87203e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 96.132459][ C0] RAX: 0000000000000000 RBX: ffffffff8722b840 RCX: ffffffff8285fdf1
[ 96.141453][ C0] RDX: 0000000000000000 RSI: ffffffff8285fdfa RDI: 0000000000000005
[ 96.149400][ C0] RBP: 0000000000000000 R08: ffffffff8722b840 R09: 0000ffff87047920
[ 96.157367][ C0] R10: 0000ffff87203e58 R11: 0000ffff87047927 R12: ffffffff8722b840
[ 96.165327][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8722b840
[ 96.173310][ C0] ? debug_smp_processor_id+0x31/0x129
[ 96.178742][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 96.184178][ C0] default_idle+0x21/0x170
[ 96.188586][ C0] do_idle+0x1b7/0x290
[ 96.192630][ C0] ? debug_smp_processor_id+0x3f/0x129
[ 96.198074][ C0] cpu_startup_entry+0x14/0x20
[ 96.202822][ C0] rest_init+0xe4/0xeb
[ 96.206869][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[ 96.213084][ C0] arch_call_rest_init+0x13/0x2b
[ 96.217997][ C0] start_kernel+0x7fe/0x823
[ 96.222498][ C0] secondary_startup_64+0xa4/0xb0
[ 96.229131][ C0] Kernel Offset: disabled
[ 96.233477][ C0] Rebooting in 86400 seconds..