[info] Using makefile-style concurrent boot in runlevel 2. [ 45.268373][ T23] audit: type=1800 audit(1571096212.813:21): pid=7146 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 45.313281][ T23] audit: type=1800 audit(1571096212.813:22): pid=7146 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 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 '10.128.10.34' (ECDSA) to the list of known hosts. 2019/10/14 23:37:01 fuzzer started 2019/10/14 23:37:03 dialing manager at 10.128.0.105:33683 2019/10/14 23:37:03 syscalls: 2523 2019/10/14 23:37:03 code coverage: enabled 2019/10/14 23:37:03 comparison tracing: enabled 2019/10/14 23:37:03 extra coverage: extra coverage is not supported by the kernel 2019/10/14 23:37:03 setuid sandbox: enabled 2019/10/14 23:37:03 namespace sandbox: enabled 2019/10/14 23:37:03 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/14 23:37:03 fault injection: enabled 2019/10/14 23:37:03 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/14 23:37:03 net packet injection: enabled 2019/10/14 23:37:03 net device setup: enabled 2019/10/14 23:37:03 concurrency sanitizer: enabled syzkaller login: [ 56.275920][ T0] ================================================================== [ 56.284201][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event [ 56.292768][ T0] [ 56.295090][ T0] write to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 0: [ 56.302448][ T0] tick_nohz_idle_stop_tick+0x525/0x670 [ 56.308062][ T0] do_idle+0x1e0/0x2c0 [ 56.312125][ T0] cpu_startup_entry+0x1b/0x20 [ 56.316875][ T0] rest_init+0xec/0xf6 [ 56.321186][ T0] arch_call_rest_init+0x17/0x37 [ 56.326114][ T0] start_kernel+0x83e/0x864 [ 56.330614][ T0] x86_64_start_reservations+0x29/0x2b [ 56.336057][ T0] x86_64_start_kernel+0x72/0x76 [ 56.341110][ T0] secondary_startup_64+0xa4/0xb0 [ 56.346108][ T0] [ 56.348415][ T0] read to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 1: [ 56.355765][ T0] tick_nohz_next_event+0x1a4/0x380 [ 56.360940][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 56.366475][ T0] do_idle+0x1e0/0x2c0 [ 56.370538][ T0] cpu_startup_entry+0x1b/0x20 [ 56.375286][ T0] start_secondary+0x207/0x260 [ 56.380038][ T0] secondary_startup_64+0xa4/0xb0 [ 56.385047][ T0] [ 56.387352][ T0] Reported by Kernel Concurrency Sanitizer on: [ 56.393502][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 56.400238][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.410283][ T0] ================================================================== [ 56.418333][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 56.424998][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 56.432149][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.442199][ T0] Call Trace: [ 56.445580][ T0] dump_stack+0xf5/0x159 [ 56.449908][ T0] panic+0x209/0x639 [ 56.453810][ T0] ? vprintk_func+0x8d/0x140 [ 56.458392][ T0] kcsan_report.cold+0xc/0x1b [ 56.463045][ T0] __kcsan_setup_watchpoint+0x3ee/0x510 [ 56.468760][ T0] __tsan_read4+0x2c/0x30 [ 56.473206][ T0] tick_nohz_next_event+0x1a4/0x380 [ 56.478512][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 56.484062][ T0] ? __tsan_read4+0x2c/0x30 [ 56.489541][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.496201][ T0] do_idle+0x1e0/0x2c0 [ 56.500259][ T0] ? complete+0x44/0x50 [ 56.504419][ T0] cpu_startup_entry+0x1b/0x20 [ 56.509190][ T0] start_secondary+0x207/0x260 [ 56.513944][ T0] secondary_startup_64+0xa4/0xb0 [ 56.520657][ T0] Kernel Offset: disabled [ 56.525086][ T0] Rebooting in 86400 seconds..