[ 42.558389][ T25] audit: type=1800 audit(1570687774.866:22): pid=7180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [ 42.579090][ T25] audit: type=1800 audit(1570687774.866:23): pid=7180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 res=0 [ 42.603011][ T25] audit: type=1800 audit(1570687774.876:24): pid=7180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2487 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 '10.128.1.59' (ECDSA) to the list of known hosts. 2019/10/10 06:09:42 fuzzer started 2019/10/10 06:09:44 dialing manager at 10.128.0.105:43471 2019/10/10 06:09:44 syscalls: 2523 2019/10/10 06:09:44 code coverage: enabled 2019/10/10 06:09:44 comparison tracing: enabled 2019/10/10 06:09:44 extra coverage: extra coverage is not supported by the kernel 2019/10/10 06:09:44 setuid sandbox: enabled 2019/10/10 06:09:44 namespace sandbox: enabled 2019/10/10 06:09:44 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/10 06:09:44 fault injection: enabled 2019/10/10 06:09:44 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/10 06:09:44 net packet injection: enabled 2019/10/10 06:09:44 net device setup: enabled 2019/10/10 06:09:44 concurrency sanitizer: enabled syzkaller login: [ 52.202703][ T0] ================================================================== [ 52.210852][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event [ 52.219418][ T0] [ 52.221729][ T0] write to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 0: [ 52.229101][ T0] tick_nohz_idle_stop_tick+0x525/0x670 [ 52.234633][ T0] do_idle+0x1e0/0x2c0 [ 52.238676][ T0] cpu_startup_entry+0x1b/0x20 [ 52.243422][ T0] rest_init+0xec/0xf6 [ 52.247468][ T0] arch_call_rest_init+0x17/0x37 [ 52.252378][ T0] start_kernel+0x83e/0x864 [ 52.256857][ T0] x86_64_start_reservations+0x29/0x2b [ 52.262294][ T0] x86_64_start_kernel+0x72/0x76 [ 52.267208][ T0] secondary_startup_64+0xa4/0xb0 [ 52.272200][ T0] [ 52.274526][ T0] read to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 1: [ 52.282050][ T0] tick_nohz_next_event+0x1a4/0x380 [ 52.287225][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 52.293440][ T0] do_idle+0x1e0/0x2c0 [ 52.297480][ T0] cpu_startup_entry+0x1b/0x20 [ 52.302218][ T0] start_secondary+0x207/0x260 [ 52.306958][ T0] secondary_startup_64+0xa4/0xb0 [ 52.311951][ T0] [ 52.314252][ T0] Reported by Kernel Concurrency Sanitizer on: [ 52.320389][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 52.327122][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.337164][ T0] ================================================================== [ 52.345196][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 52.351843][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0 [ 52.358573][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.368612][ T0] Call Trace: [ 52.371890][ T0] dump_stack+0xf5/0x159 [ 52.376123][ T0] panic+0x209/0x639 [ 52.380000][ T0] ? vprintk_func+0x8d/0x140 [ 52.384573][ T0] kcsan_report.cold+0xc/0x1b [ 52.389228][ T0] __kcsan_setup_watchpoint+0x3ee/0x510 [ 52.394752][ T0] __tsan_read4+0x2c/0x30 [ 52.399059][ T0] tick_nohz_next_event+0x1a4/0x380 [ 52.404292][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 52.409851][ T0] ? __tsan_read4+0x2c/0x30 [ 52.414333][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.421158][ T0] do_idle+0x1e0/0x2c0 [ 52.425239][ T0] ? complete+0x44/0x50 [ 52.429373][ T0] cpu_startup_entry+0x1b/0x20 [ 52.434113][ T0] start_secondary+0x207/0x260 [ 52.438873][ T0] secondary_startup_64+0xa4/0xb0 [ 52.445183][ T0] Kernel Offset: disabled [ 52.449504][ T0] Rebooting in 86400 seconds..