[ 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. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. 2020/06/14 12:57:32 fuzzer started 2020/06/14 12:57:32 dialing manager at 10.128.0.105:36539 2020/06/14 12:57:42 syscalls: 3085 2020/06/14 12:57:42 code coverage: enabled 2020/06/14 12:57:42 comparison tracing: enabled 2020/06/14 12:57:42 extra coverage: enabled 2020/06/14 12:57:42 setuid sandbox: enabled 2020/06/14 12:57:42 namespace sandbox: enabled 2020/06/14 12:57:42 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/14 12:57:42 fault injection: enabled 2020/06/14 12:57:42 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/14 12:57:42 net packet injection: enabled 2020/06/14 12:57:42 net device setup: enabled 2020/06/14 12:57:42 concurrency sanitizer: enabled 2020/06/14 12:57:42 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/14 12:57:42 USB emulation: enabled syzkaller login: [ 64.355505][ T8917] KCSAN: could not find function: '_find_next_bit' 2020/06/14 12:57:45 adding functions to KCSAN blacklist: 'ptrace_check_attach' 'do_signal_stop' 'run_timer_softirq' 'xas_clear_mark' 'generic_file_read_iter' 'file_update_time' 'pcpu_alloc' '__filemap_fdatawrite_range' '__send_signal' 'ep_poll' 'page_counter_charge' '__ext4_new_inode' 'tick_sched_do_timer' 'vm_area_dup' 'blk_mq_dispatch_rq_list' 'generic_write_end' 'do_nanosleep' 'blk_mq_request_bypass_insert' 'decrypt_packet' 'find_get_pages_range_tag' 'ext4_mb_good_group' 'ext4_mark_iloc_dirty' 'copy_process' '_find_next_bit' 'futex_wait_queue_me' 'kauditd_thread' [ 116.971020][ T0] ================================================================== [ 116.979625][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick [ 116.988569][ T0] [ 116.990888][ T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0: [ 116.998247][ T0] tick_nohz_idle_stop_tick+0x52c/0x680 [ 117.004135][ T0] do_idle+0x1ad/0x290 [ 117.008184][ T0] cpu_startup_entry+0x14/0x20 [ 117.012938][ T0] rest_init+0xe4/0xeb [ 117.016995][ T0] arch_call_rest_init+0x13/0x2b [ 117.021919][ T0] start_kernel+0x7fe/0x823 [ 117.026401][ T0] secondary_startup_64+0xa4/0xb0 [ 117.031429][ T0] [ 117.033858][ T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1: [ 117.041118][ T0] tick_nohz_idle_stop_tick+0x191/0x680 [ 117.046639][ T0] do_idle+0x1ad/0x290 [ 117.050685][ T0] cpu_startup_entry+0x14/0x20 [ 117.055451][ T0] start_secondary+0x169/0x1b0 [ 117.060204][ T0] secondary_startup_64+0xa4/0xb0 [ 117.065284][ T0] [ 117.067602][ T0] Reported by Kernel Concurrency Sanitizer on: [ 117.073820][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 [ 117.081696][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 117.091839][ T0] ================================================================== [ 117.100193][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 117.106764][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 [ 117.114690][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 117.124748][ T0] Call Trace: [ 117.128039][ T0] dump_stack+0x11d/0x187 [ 117.132370][ T0] panic+0x210/0x640 [ 117.136336][ T0] ? vprintk_func+0x89/0x13a [ 117.140995][ T0] kcsan_report.cold+0xc/0x1a [ 117.145672][ T0] kcsan_setup_watchpoint+0x3fb/0x440 [ 117.151027][ T0] tick_nohz_idle_stop_tick+0x191/0x680 [ 117.156553][ T0] do_idle+0x1ad/0x290 [ 117.160602][ T0] cpu_startup_entry+0x14/0x20 [ 117.165532][ T0] start_secondary+0x169/0x1b0 [ 117.170275][ T0] secondary_startup_64+0xa4/0xb0 [ 117.176861][ T0] Kernel Offset: disabled [ 117.181182][ T0] Rebooting in 86400 seconds..