[info] Using makefile-style concurrent boot in runlevel 2. [ 45.549293][ T23] audit: type=1800 audit(1570941176.818:21): pid=7201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.115' (ECDSA) to the list of known hosts. 2019/10/13 04:33:08 fuzzer started 2019/10/13 04:33:08 dialing manager at 10.128.0.105:43913 2019/10/13 04:33:09 syscalls: 2523 2019/10/13 04:33:09 code coverage: enabled 2019/10/13 04:33:09 comparison tracing: enabled 2019/10/13 04:33:09 extra coverage: extra coverage is not supported by the kernel 2019/10/13 04:33:09 setuid sandbox: enabled 2019/10/13 04:33:09 namespace sandbox: enabled 2019/10/13 04:33:09 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/13 04:33:09 fault injection: enabled 2019/10/13 04:33:09 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/13 04:33:09 net packet injection: enabled 2019/10/13 04:33:09 net device setup: enabled 2019/10/13 04:33:09 concurrency sanitizer: enabled syzkaller login: [ 58.029952][ T0] ================================================================== [ 58.038097][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event [ 58.046656][ T0] [ 58.048970][ T0] write to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 0: [ 58.056329][ T0] tick_nohz_idle_stop_tick+0x525/0x670 [ 58.061944][ T0] do_idle+0x1e0/0x2c0 [ 58.066004][ T0] cpu_startup_entry+0x1b/0x20 [ 58.070747][ T0] rest_init+0xec/0xf6 [ 58.074794][ T0] arch_call_rest_init+0x17/0x37 [ 58.079708][ T0] start_kernel+0x83e/0x864 [ 58.084190][ T0] x86_64_start_reservations+0x29/0x2b [ 58.089630][ T0] x86_64_start_kernel+0x72/0x76 [ 58.094546][ T0] secondary_startup_64+0xa4/0xb0 [ 58.099537][ T0] [ 58.101885][ T0] read to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 1: [ 58.109180][ T0] tick_nohz_next_event+0x1a4/0x380 [ 58.114349][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 58.119868][ T0] do_idle+0x1e0/0x2c0 [ 58.123910][ T0] cpu_startup_entry+0x1b/0x20 [ 58.128794][ T0] start_secondary+0x207/0x260 [ 58.133545][ T0] secondary_startup_64+0xa4/0xb0 [ 58.138535][ T0] [ 58.140834][ T0] Reported by Kernel Concurrency Sanitizer on: [ 58.147007][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 58.153740][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.163780][ T0] ================================================================== [ 58.171828][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 58.178389][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 58.185119][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.195145][ T0] Call Trace: [ 58.198412][ T0] dump_stack+0xf5/0x159 [ 58.202634][ T0] panic+0x209/0x639 [ 58.206511][ T0] ? vprintk_func+0x8d/0x140 [ 58.211105][ T0] kcsan_report.cold+0xc/0x1b [ 58.215763][ T0] __kcsan_setup_watchpoint+0x3ee/0x510 [ 58.221283][ T0] __tsan_read4+0x2c/0x30 [ 58.225602][ T0] tick_nohz_next_event+0x1a4/0x380 [ 58.230791][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 58.236310][ T0] ? __tsan_read4+0x2c/0x30 [ 58.240792][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.247010][ T0] do_idle+0x1e0/0x2c0 [ 58.251068][ T0] ? complete+0x44/0x50 [ 58.255201][ T0] cpu_startup_entry+0x1b/0x20 [ 58.259944][ T0] start_secondary+0x207/0x260 [ 58.264796][ T0] secondary_startup_64+0xa4/0xb0 [ 58.271193][ T0] Kernel Offset: disabled [ 58.275510][ T0] Rebooting in 86400 seconds..