[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 34.855732][ T25] audit: type=1800 audit(1571294610.908:25): pid=7039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 34.897377][ T25] audit: type=1800 audit(1571294610.908:26): pid=7039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 34.926628][ T25] audit: type=1800 audit(1571294610.908:27): pid=7039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] 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 '10.128.15.215' (ECDSA) to the list of known hosts.
2019/10/17 06:43:38 fuzzer started
2019/10/17 06:43:40 dialing manager at 10.128.0.105:33899
2019/10/17 06:43:40 syscalls: 2524
2019/10/17 06:43:40 code coverage: enabled
2019/10/17 06:43:40 comparison tracing: enabled
2019/10/17 06:43:40 extra coverage: extra coverage is not supported by the kernel
2019/10/17 06:43:40 setuid sandbox: enabled
2019/10/17 06:43:40 namespace sandbox: enabled
2019/10/17 06:43:40 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/17 06:43:40 fault injection: enabled
2019/10/17 06:43:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/17 06:43:40 net packet injection: enabled
2019/10/17 06:43:40 net device setup: enabled
2019/10/17 06:43:40 concurrency sanitizer: enabled
syzkaller login: [ 44.800356][ T0] ==================================================================
[ 44.808505][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 44.817424][ T0]
[ 44.819769][ T0] write to 0xffffffff86042008 of 8 bytes by interrupt on cpu 1:
[ 44.827582][ T0] tick_do_update_jiffies64+0x105/0x260
[ 44.833108][ T0] tick_sched_do_timer+0xd4/0xe0
[ 44.838036][ T0] tick_sched_timer+0x43/0xe0
[ 44.842693][ T0] __hrtimer_run_queues+0x288/0x600
[ 44.847876][ T0] hrtimer_interrupt+0x22a/0x480
[ 44.852806][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 44.858251][ T0] apic_timer_interrupt+0xf/0x20
[ 44.863171][ T0]
[ 44.865494][ T0] read to 0xffffffff86042008 of 8 bytes by task 0 on cpu 0:
[ 44.872763][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 44.878213][ T0] tick_irq_enter+0x139/0x1c0
[ 44.882877][ T0] irq_enter+0x4f/0x60
[ 44.886950][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 44.892446][ T0] apic_timer_interrupt+0xf/0x20
[ 44.897372][ T0] native_safe_halt+0xe/0x10
[ 44.901947][ T0] arch_cpu_idle+0x1f/0x30
[ 44.906356][ T0] default_idle_call+0x1e/0x40
[ 44.911104][ T0] do_idle+0x1af/0x280
[ 44.915165][ T0] cpu_startup_entry+0x1b/0x20
[ 44.919914][ T0] rest_init+0xec/0xf6
[ 44.923957][ T0] arch_call_rest_init+0x17/0x37
[ 44.928876][ T0] start_kernel+0x838/0x85e
[ 44.933359][ T0]
[ 44.935660][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 44.941817][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
[ 44.948908][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 44.959078][ T0] ==================================================================
[ 44.967129][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 44.973708][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
[ 44.980796][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 44.990841][ T0] Call Trace:
[ 44.994112][ T0]
[ 44.996962][ T0] dump_stack+0xf5/0x159
[ 45.001220][ T0] panic+0x210/0x640
[ 45.005123][ T0] ? do_idle+0x1af/0x280
[ 45.009361][ T0] ? vprintk_func+0x8d/0x140
[ 45.013934][ T0] kcsan_report.cold+0xc/0x1b
[ 45.018599][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 45.024138][ T0] __tsan_read8+0x2c/0x30
[ 45.028457][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 45.033908][ T0] tick_irq_enter+0x139/0x1c0
[ 45.038580][ T0] irq_enter+0x4f/0x60
[ 45.042639][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 45.048080][ T0] ? do_IRQ+0xcb/0x180
[ 45.052139][ T0] apic_timer_interrupt+0xf/0x20
[ 45.057056][ T0]
[ 45.060009][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 45.065384][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d fc b2 4b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d ec b2 4b 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 52 0a a4 fc e8 2d 86 b8 fd 0f
[ 45.084989][ T0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 45.093393][ T0] RAX: fbe76c8b4395bb62 RBX: ffffffff85a2b780 RCX: 00000000000007b9
[ 45.101360][ T0] RDX: 000000000032a0f0 RSI: 020c49ba5e353f7d RDI: ffffffff85a563b8
[ 45.109325][ T0] RBP: ffffffff85a03e18 R08: 0000000000000000 R09: 0000ffff85a563bf
[ 45.117291][ T0] R10: 00000000aaaaaaab R11: ffffffff86045cc8 R12: 0000000000000000
[ 45.125261][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 45.133264][ T0] ? default_idle+0x50/0x230
[ 45.137850][ T0] arch_cpu_idle+0x1f/0x30
[ 45.142257][ T0] default_idle_call+0x1e/0x40
[ 45.147010][ T0] do_idle+0x1af/0x280
[ 45.151074][ T0] cpu_startup_entry+0x1b/0x20
[ 45.155894][ T0] rest_init+0xec/0xf6
[ 45.159961][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 45.167152][ T0] arch_call_rest_init+0x17/0x37
[ 45.172075][ T0] start_kernel+0x838/0x85e
[ 45.176566][ T0] x86_64_start_reservations+0x29/0x2b
[ 45.182060][ T0] x86_64_start_kernel+0x72/0x76
[ 45.187019][ T0] secondary_startup_64+0xa4/0xb0
[ 45.193248][ T0] Kernel Offset: disabled
[ 45.197579][ T0] Rebooting in 86400 seconds..