[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 50.918282][ T26] audit: type=1800 audit(1581376129.407:21): pid=7726 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 50.963392][ T26] audit: type=1800 audit(1581376129.417:22): pid=7726 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.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts.
2020/02/10 23:09:02 fuzzer started
2020/02/10 23:09:04 dialing manager at 10.128.0.105:43641
2020/02/10 23:09:05 syscalls: 2904
2020/02/10 23:09:05 code coverage: enabled
2020/02/10 23:09:05 comparison tracing: enabled
2020/02/10 23:09:05 extra coverage: enabled
2020/02/10 23:09:05 setuid sandbox: enabled
2020/02/10 23:09:05 namespace sandbox: enabled
2020/02/10 23:09:05 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/10 23:09:05 fault injection: enabled
2020/02/10 23:09:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/10 23:09:05 net packet injection: enabled
2020/02/10 23:09:05 net device setup: enabled
2020/02/10 23:09:05 concurrency sanitizer: enabled
2020/02/10 23:09:05 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 67.029579][ T0] ==================================================================
[ 67.037739][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 67.046664][ T0]
[ 67.048995][ T0] write to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 1:
[ 67.056654][ T0] tick_do_update_jiffies64+0x100/0x250
[ 67.062214][ T0] tick_sched_do_timer+0xd4/0xe0
[ 67.067160][ T0] tick_sched_timer+0x43/0xe0
[ 67.071845][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 67.077045][ T0] hrtimer_interrupt+0x22a/0x480
[ 67.081994][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 67.087454][ T0] apic_timer_interrupt+0xf/0x20
[ 67.092394][ T0] kcsan_setup_watchpoint+0x211/0x380
[ 67.097770][ T0] __tsan_read1+0xc2/0x100
[ 67.102196][ T0] kallsyms_expand_symbol.constprop.0+0x103/0x160
[ 67.108610][ T0] kallsyms_lookup_name+0x7f/0x120
[ 67.113722][ T0] debugfs_write+0x16c/0x320
[ 67.119799][ T0] full_proxy_write+0xbd/0x100
[ 67.124575][ T0] __vfs_write+0x67/0xc0
[ 67.128817][ T0] vfs_write+0x18a/0x390
[ 67.133075][ T0] ksys_write+0xd5/0x1b0
[ 67.137323][ T0] __x64_sys_write+0x4c/0x60
[ 67.141921][ T0] do_syscall_64+0xcc/0x3a0
[ 67.146444][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 67.152328][ T0]
[ 67.154671][ T0] read to 0xffffffff8624d7c8 of 8 bytes by task 0 on cpu 0:
[ 67.161968][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 67.167450][ T0] tick_irq_enter+0x139/0x1c0
[ 67.172130][ T0] irq_enter+0x4f/0x60
[ 67.176222][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 67.181695][ T0] apic_timer_interrupt+0xf/0x20
[ 67.186666][ T0] native_safe_halt+0xe/0x10
[ 67.191267][ T0] arch_cpu_idle+0xa/0x10
[ 67.195600][ T0] default_idle_call+0x1e/0x40
[ 67.200409][ T0] do_idle+0x1c2/0x290
[ 67.204494][ T0] cpu_startup_entry+0x1b/0x20
[ 67.209260][ T0] rest_init+0xec/0xf6
[ 67.213339][ T0] arch_call_rest_init+0x17/0x37
[ 67.218283][ T0] start_kernel+0x838/0x85e
[ 67.222799][ T0] x86_64_start_reservations+0x29/0x2b
[ 67.228267][ T0] x86_64_start_kernel+0x72/0x76
[ 67.233225][ T0] secondary_startup_64+0xa4/0xb0
[ 67.238236][ T0]
[ 67.240563][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 67.246728][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 67.254743][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 67.264804][ T0] ==================================================================
[ 67.272870][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 67.279470][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 67.287363][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 67.297419][ T0] Call Trace:
[ 67.300705][ T0]
[ 67.303566][ T0] dump_stack+0x11d/0x181
[ 67.307984][ T0] panic+0x210/0x640
[ 67.311892][ T0] ? vprintk_func+0x8d/0x140
[ 67.316492][ T0] kcsan_report.cold+0xc/0x15
[ 67.321191][ T0] kcsan_setup_watchpoint+0x2e2/0x380
[ 67.326579][ T0] __tsan_read8+0xc6/0x100
[ 67.331010][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 67.336486][ T0] tick_irq_enter+0x139/0x1c0
[ 67.341182][ T0] irq_enter+0x4f/0x60
[ 67.345261][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 67.350727][ T0] apic_timer_interrupt+0xf/0x20
[ 67.355668][ T0]
[ 67.358620][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 67.364006][ T0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 1c 71 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 0c 71 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 a2 e9 90 fc e8 ed 84 ab fd 0f
[ 67.383621][ T0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 67.392043][ T0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82548b75
[ 67.400019][ T0] RDX: 0000000000000000 RSI: ffffffff82548b7e RDI: 0000000000000005
[ 67.407997][ T0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 67.415971][ T0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 67.423940][ T0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 67.431941][ T0] ? debug_smp_processor_id+0x35/0x137
[ 67.437417][ T0] ? debug_smp_processor_id+0x3e/0x137
[ 67.442883][ T0] ? default_idle+0x26/0x180
[ 67.447476][ T0] arch_cpu_idle+0xa/0x10
[ 67.451817][ T0] default_idle_call+0x1e/0x40
[ 67.456590][ T0] do_idle+0x1c2/0x290
[ 67.460658][ T0] ? debug_smp_processor_id+0x43/0x137
[ 67.466121][ T0] cpu_startup_entry+0x1b/0x20
[ 67.470875][ T0] rest_init+0xec/0xf6
[ 67.474950][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 67.482143][ T0] arch_call_rest_init+0x17/0x37
[ 67.487088][ T0] start_kernel+0x838/0x85e
[ 67.491606][ T0] x86_64_start_reservations+0x29/0x2b
[ 67.497061][ T0] x86_64_start_kernel+0x72/0x76
[ 67.502000][ T0] secondary_startup_64+0xa4/0xb0
[ 67.686962][ T0] Kernel Offset: disabled
[ 67.691351][ T0] Rebooting in 86400 seconds..