[ 42.290289][ T26] audit: type=1800 audit(1573979478.574:21): pid=7506 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 42.343301][ T26] audit: type=1800 audit(1573979478.584:22): pid=7506 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[ 42.767125][ T7530] rsyslogd (7530) used greatest stack depth: 10128 bytes left
[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.15.234' (ECDSA) to the list of known hosts.
2019/11/17 08:31:29 fuzzer started
2019/11/17 08:31:31 dialing manager at 10.128.0.105:34521
2019/11/17 08:31:31 syscalls: 2566
2019/11/17 08:31:31 code coverage: enabled
2019/11/17 08:31:31 comparison tracing: enabled
2019/11/17 08:31:31 extra coverage: extra coverage is not supported by the kernel
2019/11/17 08:31:31 setuid sandbox: enabled
2019/11/17 08:31:31 namespace sandbox: enabled
2019/11/17 08:31:31 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/17 08:31:31 fault injection: enabled
2019/11/17 08:31:31 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/17 08:31:31 net packet injection: enabled
2019/11/17 08:31:31 net device setup: enabled
2019/11/17 08:31:31 concurrency sanitizer: enabled
2019/11/17 08:31:31 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 60.493424][ T0] ==================================================================
[ 60.502180][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 60.511092][ T0]
[ 60.513443][ T0] write to 0xffffffff8603d008 of 8 bytes by interrupt on cpu 0:
[ 60.521067][ T0] tick_do_update_jiffies64+0x100/0x250
[ 60.526608][ T0] tick_sched_do_timer+0xd4/0xe0
[ 60.531544][ T0] tick_sched_timer+0x43/0xe0
[ 60.536238][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 60.541448][ T0] hrtimer_interrupt+0x22a/0x480
[ 60.546392][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 60.551843][ T0] apic_timer_interrupt+0xf/0x20
[ 60.556779][ T0] __tsan_unaligned_write1+0x81/0x100
[ 60.562145][ T0] kallsyms_expand_symbol.constprop.0+0xe8/0x160
[ 60.568569][ T0] kallsyms_lookup_name+0x7f/0x120
[ 60.573690][ T0] debugfs_write+0x14b/0x2d0
[ 60.578278][ T0] full_proxy_write+0xbd/0x100
[ 60.583031][ T0] __vfs_write+0x67/0xc0
[ 60.587269][ T0] vfs_write+0x18a/0x390
[ 60.591517][ T0] ksys_write+0xd5/0x1b0
[ 60.595752][ T0] __x64_sys_write+0x4c/0x60
[ 60.600340][ T0] do_syscall_64+0xcc/0x370
[ 60.604870][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 60.610748][ T0]
[ 60.613071][ T0] read to 0xffffffff8603d008 of 8 bytes by task 0 on cpu 1:
[ 60.620349][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 60.626933][ T0] tick_irq_enter+0x139/0x1c0
[ 60.631640][ T0] irq_enter+0x4f/0x60
[ 60.635974][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 60.641425][ T0] apic_timer_interrupt+0xf/0x20
[ 60.646357][ T0] native_safe_halt+0xe/0x10
[ 60.650951][ T0] arch_cpu_idle+0xa/0x10
[ 60.655273][ T0] default_idle_call+0x1e/0x40
[ 60.660030][ T0] do_idle+0x1af/0x280
[ 60.664090][ T0] cpu_startup_entry+0x1b/0x20
[ 60.668856][ T0] start_secondary+0x168/0x1b0
[ 60.673618][ T0] secondary_startup_64+0xa4/0xb0
[ 60.678627][ T0]
[ 60.680946][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 60.687096][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[ 60.694189][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 60.704233][ T0] ==================================================================
[ 60.712292][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 60.718873][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[ 60.725966][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 60.736011][ T0] Call Trace:
[ 60.739305][ T0]
[ 60.742171][ T0] dump_stack+0x11d/0x181
[ 60.746509][ T0] panic+0x210/0x640
[ 60.750407][ T0] ? vprintk_func+0x8d/0x140
[ 60.755002][ T0] kcsan_report.cold+0xc/0xd
[ 60.759590][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 60.764966][ T0] __tsan_read8+0xc6/0x100
[ 60.769379][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 60.774834][ T0] tick_irq_enter+0x139/0x1c0
[ 60.779504][ T0] irq_enter+0x4f/0x60
[ 60.783584][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 60.789737][ T0] apic_timer_interrupt+0xf/0x20
[ 60.794670][ T0]
[ 60.797640][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 60.803016][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d fc c9 48 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d ec c9 48 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 82 89 9f fc e8 8d 30 b5 fd 0f
[ 60.822640][ T0] RSP: 0018:ffffc90000cd3e70 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 60.831067][ T0] RAX: 0000000000000001 RBX: ffff88812b38b0c0 RCX: ffffffff824edc99
[ 60.839162][ T0] RDX: 0000000000000000 RSI: ffffffff824edca7 RDI: 0000000000000005
[ 60.847140][ T0] RBP: ffffc90000cd3e90 R08: ffff88812b38b0c0 R09: 0000ffff857d1168
[ 60.855106][ T0] R10: 0000ffff855dbad5 R11: 0000ffff857d116f R12: 0000000000000001
[ 60.863087][ T0] R13: ffff88812b38b0c0 R14: 0000000000000000 R15: 0000000000000000
[ 60.871080][ T0] ? debug_smp_processor_id+0x39/0x172
[ 60.876534][ T0] ? debug_smp_processor_id+0x47/0x172
[ 60.881993][ T0] ? default_idle+0x26/0x180
[ 60.886580][ T0] arch_cpu_idle+0xa/0x10
[ 60.890902][ T0] default_idle_call+0x1e/0x40
[ 60.895662][ T0] do_idle+0x1af/0x280
[ 60.899727][ T0] ? complete+0x44/0x50
[ 60.903970][ T0] cpu_startup_entry+0x1b/0x20
[ 60.908729][ T0] start_secondary+0x168/0x1b0
[ 60.913497][ T0] secondary_startup_64+0xa4/0xb0
[ 60.919984][ T0] Kernel Offset: disabled
[ 60.924330][ T0] Rebooting in 86400 seconds..