[ 41.319593][ T25] audit: type=1800 audit(1573848153.276:21): pid=7540 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 41.378283][ T25] audit: type=1800 audit(1573848153.276:22): pid=7540 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[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 42.340882][ T7606] sshd (7606) used greatest stack depth: 10128 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts.
2019/11/15 20:02:44 fuzzer started
2019/11/15 20:02:45 dialing manager at 10.128.0.105:44219
2019/11/15 20:02:45 syscalls: 2566
2019/11/15 20:02:45 code coverage: enabled
2019/11/15 20:02:45 comparison tracing: enabled
2019/11/15 20:02:45 extra coverage: extra coverage is not supported by the kernel
2019/11/15 20:02:45 setuid sandbox: enabled
2019/11/15 20:02:45 namespace sandbox: enabled
2019/11/15 20:02:45 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/15 20:02:45 fault injection: enabled
2019/11/15 20:02:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/15 20:02:45 net packet injection: enabled
2019/11/15 20:02:45 net device setup: enabled
2019/11/15 20:02:45 concurrency sanitizer: enabled
2019/11/15 20:02:45 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 54.448509][ T0] ==================================================================
[ 54.456648][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 54.465567][ T0]
[ 54.467896][ T0] write to 0xffffffff8603d008 of 8 bytes by interrupt on cpu 1:
[ 54.475524][ T0] tick_do_update_jiffies64+0x100/0x250
[ 54.481073][ T0] tick_sched_do_timer+0xd4/0xe0
[ 54.486046][ T0] tick_sched_timer+0x43/0xe0
[ 54.490726][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 54.495921][ T0] hrtimer_interrupt+0x22a/0x480
[ 54.501372][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 54.506944][ T0] apic_timer_interrupt+0xf/0x20
[ 54.511889][ T0] kcsan_setup_watchpoint+0x1d4/0x460
[ 54.517263][ T0] __tsan_read1+0xc2/0x100
[ 54.521678][ T0] kallsyms_expand_symbol.constprop.0+0x70/0x160
[ 54.528876][ T0] kallsyms_lookup_name+0x7f/0x120
[ 54.533991][ T0] debugfs_write+0x14b/0x2d0
[ 54.538575][ T0] full_proxy_write+0xbd/0x100
[ 54.543336][ T0] __vfs_write+0x67/0xc0
[ 54.547568][ T0] vfs_write+0x18a/0x390
[ 54.551798][ T0] ksys_write+0xd5/0x1b0
[ 54.556030][ T0] __x64_sys_write+0x4c/0x60
[ 54.560620][ T0] do_syscall_64+0xcc/0x370
[ 54.565116][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 54.570997][ T0]
[ 54.573318][ T0] read to 0xffffffff8603d008 of 8 bytes by task 0 on cpu 0:
[ 54.585542][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 54.590995][ T0] tick_irq_enter+0x139/0x1c0
[ 54.595697][ T0] irq_enter+0x4f/0x60
[ 54.599763][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 54.605211][ T0] apic_timer_interrupt+0xf/0x20
[ 54.610253][ T0] native_safe_halt+0xe/0x10
[ 54.614837][ T0] arch_cpu_idle+0xa/0x10
[ 54.619162][ T0] default_idle_call+0x1e/0x40
[ 54.623912][ T0] do_idle+0x1af/0x280
[ 54.627978][ T0] cpu_startup_entry+0x1b/0x20
[ 54.634342][ T0] rest_init+0xec/0xf6
[ 54.638446][ T0] arch_call_rest_init+0x17/0x37
[ 54.643727][ T0] start_kernel+0x838/0x85e
[ 54.648226][ T0] x86_64_start_reservations+0x29/0x2b
[ 54.653847][ T0] x86_64_start_kernel+0x72/0x76
[ 54.658779][ T0] secondary_startup_64+0xa4/0xb0
[ 54.663833][ T0]
[ 54.666248][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 54.673289][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 54.680381][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 54.691727][ T0] ==================================================================
[ 54.699958][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 54.706570][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 54.713770][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 54.723903][ T0] Call Trace:
[ 54.727186][ T0]
[ 54.730603][ T0] dump_stack+0x11d/0x181
[ 54.734939][ T0] panic+0x210/0x640
[ 54.738854][ T0] ? vprintk_func+0x8d/0x140
[ 54.743751][ T0] kcsan_report.cold+0xc/0xd
[ 54.748351][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 54.753811][ T0] __tsan_read8+0xc6/0x100
[ 54.758230][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 54.765863][ T0] tick_irq_enter+0x139/0x1c0
[ 54.770551][ T0] irq_enter+0x4f/0x60
[ 54.774783][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 54.781054][ T0] apic_timer_interrupt+0xf/0x20
[ 54.786775][ T0]
[ 54.789732][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 54.795112][ 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
[ 54.814887][ T0] RSP: 0018:ffffffff85a03df8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 54.824190][ T0] RAX: 0000000000000000 RBX: ffffffff85a2b780 RCX: ffffffff824edc99
[ 54.832360][ T0] RDX: 0000000000000000 RSI: ffffffff824edca7 RDI: 0000000000000005
[ 54.840338][ T0] RBP: ffffffff85a03e18 R08: ffffffff85a2b780 R09: 0000ffff857d1160
[ 54.848316][ T0] R10: 0000000000041800 R11: 0000ffff857d1167 R12: 0000000000000000
[ 54.857006][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 54.865013][ T0] ? debug_smp_processor_id+0x39/0x172
[ 54.870486][ T0] ? debug_smp_processor_id+0x47/0x172
[ 54.879862][ T0] ? default_idle+0x26/0x180
[ 54.884466][ T0] arch_cpu_idle+0xa/0x10
[ 54.889425][ T0] default_idle_call+0x1e/0x40
[ 54.894225][ T0] do_idle+0x1af/0x280
[ 54.898391][ T0] cpu_startup_entry+0x1b/0x20
[ 54.903245][ T0] rest_init+0xec/0xf6
[ 54.907318][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 54.914512][ T0] arch_call_rest_init+0x17/0x37
[ 54.919446][ T0] start_kernel+0x838/0x85e
[ 54.924562][ T0] x86_64_start_reservations+0x29/0x2b
[ 54.930016][ T0] x86_64_start_kernel+0x72/0x76
[ 54.934954][ T0] secondary_startup_64+0xa4/0xb0
[ 55.025299][ T0] Kernel Offset: disabled
[ 55.029773][ T0] Rebooting in 86400 seconds..