[ 42.136521][ T26] audit: type=1800 audit(1573711690.371:21): pid=7391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 42.188623][ T26] audit: type=1800 audit(1573711690.371:22): pid=7391 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.
[ 43.283372][ T7459] sshd (7459) 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 '10.128.0.110' (ECDSA) to the list of known hosts.
2019/11/14 06:08:21 fuzzer started
2019/11/14 06:08:23 dialing manager at 10.128.0.105:45453
2019/11/14 06:08:23 syscalls: 2566
2019/11/14 06:08:23 code coverage: enabled
2019/11/14 06:08:23 comparison tracing: enabled
2019/11/14 06:08:23 extra coverage: extra coverage is not supported by the kernel
2019/11/14 06:08:23 setuid sandbox: enabled
2019/11/14 06:08:23 namespace sandbox: enabled
2019/11/14 06:08:23 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/14 06:08:23 fault injection: enabled
2019/11/14 06:08:23 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/14 06:08:23 net packet injection: enabled
2019/11/14 06:08:23 net device setup: enabled
2019/11/14 06:08:23 concurrency sanitizer: enabled
2019/11/14 06:08:23 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 62.990383][ T0] ==================================================================
[ 62.998543][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 63.007896][ T0]
[ 63.010218][ T0] write to 0xffffffff86046008 of 8 bytes by interrupt on cpu 1:
[ 63.017853][ T0] tick_do_update_jiffies64+0x100/0x250
[ 63.023392][ T0] tick_sched_do_timer+0xd4/0xe0
[ 63.028336][ T0] tick_sched_timer+0x43/0xe0
[ 63.033024][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 63.038231][ T0] hrtimer_interrupt+0x22a/0x480
[ 63.043173][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 63.048637][ T0] apic_timer_interrupt+0xf/0x20
[ 63.053582][ T0] kcsan_setup_watchpoint+0x1d4/0x460
[ 63.058948][ T0] __tsan_read1+0xc2/0x100
[ 63.063380][ T0] kallsyms_expand_symbol.constprop.0+0x103/0x160
[ 63.069782][ T0] kallsyms_lookup_name+0x7f/0x120
[ 63.074895][ T0] debugfs_write+0x14b/0x2d0
[ 63.079480][ T0] full_proxy_write+0xbd/0x100
[ 63.084246][ T0] __vfs_write+0x67/0xc0
[ 63.088479][ T0] vfs_write+0x18a/0x390
[ 63.092717][ T0] ksys_write+0xd5/0x1b0
[ 63.096957][ T0] __x64_sys_write+0x4c/0x60
[ 63.101545][ T0] do_syscall_64+0xcc/0x370
[ 63.106039][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 63.111914][ T0]
[ 63.114235][ T0] read to 0xffffffff86046008 of 8 bytes by task 0 on cpu 0:
[ 63.121515][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 63.126964][ T0] tick_irq_enter+0x139/0x1c0
[ 63.131635][ T0] irq_enter+0x4f/0x60
[ 63.135699][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 63.141164][ T0] apic_timer_interrupt+0xf/0x20
[ 63.146094][ T0] native_safe_halt+0xe/0x10
[ 63.150807][ T0] arch_cpu_idle+0x1f/0x30
[ 63.155241][ T0] default_idle_call+0x1e/0x40
[ 63.160017][ T0] do_idle+0x1af/0x280
[ 63.164201][ T0] cpu_startup_entry+0x1b/0x20
[ 63.168978][ T0] rest_init+0xec/0xf6
[ 63.173045][ T0] arch_call_rest_init+0x17/0x37
[ 63.177982][ T0] start_kernel+0x838/0x85e
[ 63.182527][ T0] x86_64_start_reservations+0x29/0x2b
[ 63.187980][ T0] x86_64_start_kernel+0x72/0x76
[ 63.192911][ T0] secondary_startup_64+0xa4/0xb0
[ 63.197938][ T0]
[ 63.200249][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 63.206402][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 63.213497][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 63.223536][ T0] ==================================================================
[ 63.231586][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 63.238257][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 63.245347][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 63.255388][ T0] Call Trace:
[ 63.258663][ T0]
[ 63.261512][ T0] dump_stack+0x11d/0x181
[ 63.265834][ T0] panic+0x210/0x640
[ 63.269731][ T0] ? vprintk_func+0x8d/0x140
[ 63.274322][ T0] kcsan_report.cold+0xc/0x1a
[ 63.279001][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 63.284627][ T0] __tsan_read8+0xc6/0x100
[ 63.289040][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 63.294494][ T0] tick_irq_enter+0x139/0x1c0
[ 63.299515][ T0] irq_enter+0x4f/0x60
[ 63.303580][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 63.309036][ T0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 63.314660][ T0] apic_timer_interrupt+0xf/0x20
[ 63.319580][ T0]
[ 63.322512][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 63.327883][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 6c 52 47 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 5c 52 47 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 d2 9a 9f fc e8 bd 3f b5 fd 0f
[ 63.347476][ T0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 63.355880][ T0] RAX: 0000000000000016 RBX: ffffffff85a2b780 RCX: ffffffff86049ce8
[ 63.363842][ T0] RDX: 0000000000000000 RSI: ffffffff82506027 RDI: ffffffff85a56378
[ 63.371829][ T0] RBP: ffffffff85a03e18 R08: 0000000000000000 R09: 0000ffff85a56378
[ 63.379795][ T0] R10: 0000ffff855db74a R11: 0000ffff85a5637f R12: 0000000000000000
[ 63.387779][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 63.395944][ T0] ? debug_smp_processor_id+0x47/0x172
[ 63.401603][ T0] ? default_idle+0x50/0x230
[ 63.406365][ T0] arch_cpu_idle+0x1f/0x30
[ 63.411470][ T0] default_idle_call+0x1e/0x40
[ 63.416234][ T0] do_idle+0x1af/0x280
[ 63.420311][ T0] cpu_startup_entry+0x1b/0x20
[ 63.425066][ T0] rest_init+0xec/0xf6
[ 63.429135][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 63.436504][ T0] arch_call_rest_init+0x17/0x37
[ 63.441435][ T0] start_kernel+0x838/0x85e
[ 63.445938][ T0] x86_64_start_reservations+0x29/0x2b
[ 63.451400][ T0] x86_64_start_kernel+0x72/0x76
[ 63.456508][ T0] secondary_startup_64+0xa4/0xb0
[ 63.504985][ T0] Kernel Offset: disabled
[ 63.509318][ T0] Rebooting in 86400 seconds..