[....] 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.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 56.495644][ T27] kauditd_printk_skb: 7 callbacks suppressed
[ 56.495661][ T27] audit: type=1800 audit(1580695968.668:29): pid=7851 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0
[ 56.522326][ T27] audit: type=1800 audit(1580695968.668:30): pid=7851 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts.
2020/02/03 02:12:58 fuzzer started
2020/02/03 02:13:00 dialing manager at 10.128.0.105:41149
2020/02/03 02:13:01 syscalls: 2904
2020/02/03 02:13:01 code coverage: enabled
2020/02/03 02:13:01 comparison tracing: enabled
2020/02/03 02:13:01 extra coverage: enabled
2020/02/03 02:13:01 setuid sandbox: enabled
2020/02/03 02:13:01 namespace sandbox: enabled
2020/02/03 02:13:01 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/03 02:13:01 fault injection: enabled
2020/02/03 02:13:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/03 02:13:01 net packet injection: enabled
2020/02/03 02:13:01 net device setup: enabled
2020/02/03 02:13:01 concurrency sanitizer: enabled
2020/02/03 02:13:01 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 69.252734][ T0] ==================================================================
[ 69.260903][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 69.269828][ T0]
[ 69.272263][ T0] write to 0xffffffff8624c7c8 of 8 bytes by interrupt on cpu 0:
[ 69.279946][ T0] tick_do_update_jiffies64+0x100/0x250
[ 69.285501][ T0] tick_sched_do_timer+0xd4/0xe0
[ 69.290450][ T0] tick_sched_timer+0x43/0xe0
[ 69.295144][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 69.300538][ T0] hrtimer_interrupt+0x22a/0x480
[ 69.305475][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 69.310943][ T0] apic_timer_interrupt+0xf/0x20
[ 69.315900][ T0] kallsyms_expand_symbol.constprop.0+0xd8/0x160
[ 69.322246][ T0] kallsyms_lookup_name+0x7f/0x120
[ 69.327361][ T0] debugfs_write+0x14b/0x2d0
[ 69.331962][ T0] full_proxy_write+0xbd/0x100
[ 69.336740][ T0] __vfs_write+0x67/0xc0
[ 69.340992][ T0] vfs_write+0x18a/0x390
[ 69.345251][ T0] ksys_write+0xd5/0x1b0
[ 69.349512][ T0] __x64_sys_write+0x4c/0x60
[ 69.354115][ T0] do_syscall_64+0xcc/0x3a0
[ 69.358639][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 69.364516][ T0]
[ 69.366857][ T0] read to 0xffffffff8624c7c8 of 8 bytes by task 0 on cpu 1:
[ 69.374151][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 69.379624][ T0] tick_irq_enter+0x139/0x1c0
[ 69.384310][ T0] irq_enter+0x4f/0x60
[ 69.388389][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 69.393855][ T0] apic_timer_interrupt+0xf/0x20
[ 69.398807][ T0] native_safe_halt+0xe/0x10
[ 69.403412][ T0] arch_cpu_idle+0xa/0x10
[ 69.407784][ T0] default_idle_call+0x1e/0x40
[ 69.412553][ T0] do_idle+0x1c2/0x290
[ 69.416626][ T0] cpu_startup_entry+0x1b/0x20
[ 69.421502][ T0] start_secondary+0x168/0x1b0
[ 69.426278][ T0] secondary_startup_64+0xa4/0xb0
[ 69.431293][ T0]
[ 69.433619][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 69.439779][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 69.447664][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 69.457719][ T0] ==================================================================
[ 69.465785][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 69.472480][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 69.480369][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 69.490428][ T0] Call Trace:
[ 69.493711][ T0]
[ 69.496573][ T0] dump_stack+0x11d/0x181
[ 69.500925][ T0] panic+0x210/0x640
[ 69.504843][ T0] ? vprintk_func+0x8d/0x140
[ 69.509444][ T0] kcsan_report.cold+0xc/0xd
[ 69.514050][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 69.519436][ T0] __tsan_read8+0xc6/0x100
[ 69.523859][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 69.529331][ T0] tick_irq_enter+0x139/0x1c0
[ 69.534031][ T0] irq_enter+0x4f/0x60
[ 69.538108][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 69.543585][ T0] apic_timer_interrupt+0xf/0x20
[ 69.548519][ T0]
[ 69.551469][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 69.556856][ T0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 4c e6 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 3c e6 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 d2 57 91 fc e8 fd da ab fd 0f
[ 69.576476][ T0] RSP: 0018:ffffc90000cd3e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 69.585089][ T0] RAX: 0000000000000001 RBX: ffff88812b785040 RCX: ffffffff82546c55
[ 69.593064][ T0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 69.601046][ T0] RBP: ffffc90000cd3e90 R08: ffff88812b785040 R09: 0000ffff85a2d168
[ 69.609211][ T0] R10: 0000c90000cd3e80 R11: 0000ffff85a2d16f R12: 0000000000000001
[ 69.617189][ T0] R13: ffff88812b785040 R14: 0000000000000000 R15: 0000000000000000
[ 69.625188][ T0] ? debug_smp_processor_id+0x35/0x137
[ 69.630661][ T0] ? debug_smp_processor_id+0x3e/0x137
[ 69.636143][ T0] ? default_idle+0x26/0x180
[ 69.640752][ T0] arch_cpu_idle+0xa/0x10
[ 69.645090][ T0] default_idle_call+0x1e/0x40
[ 69.649866][ T0] do_idle+0x1c2/0x290
[ 69.653938][ T0] ? complete+0x44/0x50
[ 69.658095][ T0] cpu_startup_entry+0x1b/0x20
[ 69.662882][ T0] start_secondary+0x168/0x1b0
[ 69.667657][ T0] secondary_startup_64+0xa4/0xb0
[ 69.674684][ T0] Kernel Offset: disabled
[ 69.679017][ T0] Rebooting in 86400 seconds..