[ 34.282855][ T25] audit: type=1800 audit(1571366536.042:23): pid=7066 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 res=0 [ 34.303612][ T25] audit: type=1800 audit(1571366536.042:24): pid=7066 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. [ 34.954341][ T25] audit: type=1800 audit(1571366536.782:25): pid=7066 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 34.974864][ T25] audit: type=1800 audit(1571366536.782:26): pid=7066 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 34.997875][ T25] audit: type=1800 audit(1571366536.782:27): pid=7066 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [....] 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 '10.128.0.160' (ECDSA) to the list of known hosts. 2019/10/18 02:42:23 fuzzer started 2019/10/18 02:42:25 dialing manager at 10.128.0.105:43535 2019/10/18 02:42:25 syscalls: 2524 2019/10/18 02:42:25 code coverage: enabled 2019/10/18 02:42:25 comparison tracing: enabled 2019/10/18 02:42:25 extra coverage: extra coverage is not supported by the kernel 2019/10/18 02:42:25 setuid sandbox: enabled 2019/10/18 02:42:25 namespace sandbox: enabled 2019/10/18 02:42:25 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/18 02:42:25 fault injection: enabled 2019/10/18 02:42:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/18 02:42:25 net packet injection: enabled 2019/10/18 02:42:25 net device setup: enabled 2019/10/18 02:42:25 concurrency sanitizer: enabled syzkaller login: [ 44.152728][ T0] ================================================================== [ 44.160878][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 44.169815][ T0] [ 44.172148][ T0] write to 0xffffffff86042008 of 8 bytes by interrupt on cpu 1: [ 44.179781][ T0] tick_do_update_jiffies64+0x105/0x260 [ 44.185323][ T0] tick_sched_do_timer+0xd4/0xe0 [ 44.190259][ T0] tick_sched_timer+0x43/0xe0 [ 44.194929][ T0] __hrtimer_run_queues+0x288/0x600 [ 44.200114][ T0] hrtimer_interrupt+0x22a/0x480 [ 44.205052][ T0] smp_apic_timer_interrupt+0xdc/0x280 [ 44.210506][ T0] apic_timer_interrupt+0xf/0x20 [ 44.215430][ T0] [ 44.217756][ T0] read to 0xffffffff86042008 of 8 bytes by task 0 on cpu 0: [ 44.225037][ T0] tick_do_update_jiffies64+0x2b/0x260 [ 44.230492][ T0] __tick_nohz_idle_restart_tick+0x31/0x1b0 [ 44.236380][ T0] tick_nohz_idle_exit+0x1af/0x1e0 [ 44.241490][ T0] do_idle+0xb1/0x280 [ 44.245467][ T0] cpu_startup_entry+0x1b/0x20 [ 44.250223][ T0] rest_init+0xec/0xf6 [ 44.254288][ T0] arch_call_rest_init+0x17/0x37 [ 44.259219][ T0] start_kernel+0x838/0x85e [ 44.263717][ T0] x86_64_start_reservations+0x29/0x2b [ 44.269171][ T0] x86_64_start_kernel+0x72/0x76 [ 44.274108][ T0] secondary_startup_64+0xa4/0xb0 [ 44.279113][ T0] [ 44.281429][ T0] Reported by Kernel Concurrency Sanitizer on: [ 44.287580][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0 [ 44.294679][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.304766][ T0] ================================================================== [ 44.312817][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 44.319398][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0 [ 44.326484][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.336522][ T0] Call Trace: [ 44.339809][ T0] dump_stack+0xf5/0x159 [ 44.344264][ T0] panic+0x210/0x640 [ 44.348166][ T0] ? x86_64_start_reservations+0x29/0x2b [ 44.353784][ T0] ? vprintk_func+0x8d/0x140 [ 44.358375][ T0] kcsan_report.cold+0xc/0x10 [ 44.363313][ T0] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 44.369808][ T0] __tsan_read8+0x2c/0x30 [ 44.374127][ T0] tick_do_update_jiffies64+0x2b/0x260 [ 44.379600][ T0] __tick_nohz_idle_restart_tick+0x31/0x1b0 [ 44.385488][ T0] tick_nohz_idle_exit+0x1af/0x1e0 [ 44.390606][ T0] do_idle+0xb1/0x280 [ 44.394573][ T0] cpu_startup_entry+0x1b/0x20 [ 44.399320][ T0] rest_init+0xec/0xf6 [ 44.403412][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce [ 44.410603][ T0] arch_call_rest_init+0x17/0x37 [ 44.415618][ T0] start_kernel+0x838/0x85e [ 44.420117][ T0] x86_64_start_reservations+0x29/0x2b [ 44.425576][ T0] x86_64_start_kernel+0x72/0x76 [ 44.430514][ T0] secondary_startup_64+0xa4/0xb0 [ 44.437003][ T0] Kernel Offset: disabled [ 44.441363][ T0] Rebooting in 86400 seconds..