[[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 '10.128.0.215' (ECDSA) to the list of known hosts.
2020/06/11 01:34:25 fuzzer started
2020/06/11 01:34:25 dialing manager at 10.128.0.105:37751
2020/06/11 01:34:35 syscalls: 3078
2020/06/11 01:34:35 code coverage: enabled
2020/06/11 01:34:35 comparison tracing: enabled
2020/06/11 01:34:35 extra coverage: enabled
2020/06/11 01:34:35 setuid sandbox: enabled
2020/06/11 01:34:35 namespace sandbox: enabled
2020/06/11 01:34:35 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/11 01:34:35 fault injection: enabled
2020/06/11 01:34:35 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/11 01:34:35 net packet injection: enabled
2020/06/11 01:34:35 net device setup: enabled
2020/06/11 01:34:35 concurrency sanitizer: enabled
2020/06/11 01:34:35 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/11 01:34:35 USB emulation: enabled
syzkaller login: [ 61.748193][ T8911] KCSAN: could not find function: '_find_next_bit'
2020/06/11 01:34:37 adding functions to KCSAN blacklist: 'pcpu_alloc' 'file_update_time' 'find_get_pages_range_tag' 'generic_write_end' 'do_signal_stop' 'copy_process' 'ext4_mb_good_group' 'blk_mq_sched_dispatch_requests' 'xas_clear_mark' 'alloc_pid' '__ext4_new_inode' 'dd_has_work' 'page_counter_charge' 'futex_wait_queue_me' 'run_timer_softirq' 'tick_nohz_next_event' 'complete_signal' '_find_next_bit' 'ep_poll' 'mod_timer' 'generic_file_read_iter'
[ 79.511485][ C1] ==================================================================
[ 79.521093][ C1] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[ 79.529868][ C1]
[ 79.532208][ C1] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[ 79.539896][ C1] tick_nohz_idle_stop_tick+0x52c/0x680
[ 79.545538][ C1] do_idle+0x1ad/0x290
[ 79.551582][ C1] cpu_startup_entry+0x14/0x20
[ 79.557011][ C1] rest_init+0xe4/0xeb
[ 79.561429][ C1] arch_call_rest_init+0x13/0x2b
[ 79.567322][ C1] start_kernel+0x7fe/0x823
[ 79.572281][ C1] secondary_startup_64+0xa4/0xb0
[ 79.577577][ C1]
[ 79.580249][ C1] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 79.588998][ C1] tick_sched_do_timer+0x2e/0xd0
[ 79.594848][ C1] tick_sched_timer+0x3f/0xd0
[ 79.599784][ C1] __hrtimer_run_queues+0x271/0x600
[ 79.606053][ C1] hrtimer_interrupt+0x226/0x490
[ 79.611574][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 79.617336][ C1] apic_timer_interrupt+0xf/0x20
[ 79.622407][ C1] native_safe_halt+0xe/0x10
[ 79.627424][ C1] default_idle+0x21/0x170
[ 79.631921][ C1] do_idle+0x1b7/0x290
[ 79.636071][ C1] cpu_startup_entry+0x14/0x20
[ 79.640980][ C1] start_secondary+0x169/0x1b0
[ 79.645826][ C1] secondary_startup_64+0xa4/0xb0
[ 79.651063][ C1]
[ 79.654135][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 79.660725][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[ 79.669241][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 79.680457][ C1] ==================================================================
[ 79.689004][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 79.696331][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[ 79.705060][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 79.715718][ C1] Call Trace:
[ 79.719191][ C1]
[ 79.722470][ C1] dump_stack+0x11d/0x187
[ 79.726905][ C1] panic+0x210/0x640
[ 79.730803][ C1] ? vprintk_func+0x89/0x13a
[ 79.736536][ C1] kcsan_report.cold+0xc/0x1a
[ 79.741334][ C1] kcsan_setup_watchpoint+0x3fb/0x440
[ 79.746818][ C1] tick_sched_do_timer+0x2e/0xd0
[ 79.751954][ C1] tick_sched_timer+0x3f/0xd0
[ 79.757523][ C1] __hrtimer_run_queues+0x271/0x600
[ 79.762893][ C1] ? tick_sched_do_timer+0xd0/0xd0
[ 79.768028][ C1] hrtimer_interrupt+0x226/0x490
[ 79.773393][ C1] ? kvm_clock_read+0x14/0x30
[ 79.778371][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 79.783854][ C1] apic_timer_interrupt+0xf/0x20
[ 79.788798][ C1]
[ 79.791872][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 79.797619][ C1] 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
[ 79.818766][ C1] RSP: 0018:ffffc90000cd3eb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 79.828322][ C1] RAX: 0000000000000001 RBX: ffff88812b797040 RCX: ffffffff8285fdf1
[ 79.837155][ C1] RDX: 0000000000000000 RSI: ffffffff8285fdfa RDI: 0000000000000005
[ 79.845324][ C1] RBP: 0000000000000001 R08: ffff88812b797040 R09: 0000ffff87047928
[ 79.854249][ C1] R10: 0000c90000cd3e98 R11: 0000ffff8704792f R12: ffff88812b797040
[ 79.862315][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88812b797040
[ 79.870654][ C1] ? debug_smp_processor_id+0x31/0x129
[ 79.876450][ C1] ? debug_smp_processor_id+0x3a/0x129
[ 79.882155][ C1] default_idle+0x21/0x170
[ 79.886590][ C1] do_idle+0x1b7/0x290
[ 79.890767][ C1] cpu_startup_entry+0x14/0x20
[ 79.895636][ C1] start_secondary+0x169/0x1b0
[ 79.900623][ C1] secondary_startup_64+0xa4/0xb0
[ 79.907820][ C1] Kernel Offset: disabled
[ 79.912245][ C1] Rebooting in 86400 seconds..