[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 37.588634][ T23] audit: type=1800 audit(1571182763.531:25): pid=7042 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 37.608563][ T23] audit: type=1800 audit(1571182763.531:26): pid=7042 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 37.638117][ T23] audit: type=1800 audit(1571182763.541:27): pid=7042 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 '10.128.1.14' (ECDSA) to the list of known hosts.
2019/10/15 23:39:33 fuzzer started
2019/10/15 23:39:34 connecting to host at 10.128.0.105:37983
2019/10/15 23:39:34 checking machine...
2019/10/15 23:39:34 checking revisions...
2019/10/15 23:39:34 testing simple program...
syzkaller login: [ 49.055027][ T7207] IPVS: ftp: loaded support on port[0] = 21
2019/10/15 23:39:35 building call list...
[ 49.902490][ C0] ==================================================================
[ 49.910612][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 49.918309][ C0]
[ 49.920643][ C0] read to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 1:
[ 49.928193][ C0] hrtimer_active+0x84/0x1a0
[ 49.932777][ C0] task_tick_fair+0x4c/0x900
[ 49.937358][ C0] scheduler_tick+0x5c/0xe0
[ 49.941858][ C0] update_process_times+0x5a/0x80
[ 49.946874][ C0] tick_sched_handle+0x75/0x100
[ 49.951719][ C0] tick_sched_timer+0x58/0xe0
[ 49.956398][ C0] __hrtimer_run_queues+0x288/0x600
[ 49.961594][ C0] hrtimer_interrupt+0x22a/0x480
[ 49.966522][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 49.971973][ C0] apic_timer_interrupt+0xf/0x20
[ 49.976908][ C0] s_next+0x55/0x80
[ 49.980722][ C0] seq_read+0x6df/0x960
[ 49.984869][ C0] proc_reg_read+0xe9/0x140
[ 49.989376][ C0] __vfs_read+0x67/0xc0
[ 49.993517][ C0]
[ 49.995850][ C0] write to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 0:
[ 50.003470][ C0] __hrtimer_run_queues+0x1f2/0x600
[ 50.008668][ C0] hrtimer_interrupt+0x22a/0x480
[ 50.013603][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 50.019066][ C0] apic_timer_interrupt+0xf/0x20
[ 50.023998][ C0] native_safe_halt+0xe/0x10
[ 50.028598][ C0] arch_cpu_idle+0x1f/0x30
[ 50.033013][ C0] default_idle_call+0x1e/0x40
[ 50.037794][ C0] do_idle+0x1af/0x280
[ 50.041865][ C0] cpu_startup_entry+0x1b/0x20
[ 50.046624][ C0] rest_init+0xec/0xf6
[ 50.050683][ C0] arch_call_rest_init+0x17/0x37
[ 50.055609][ C0] start_kernel+0x838/0x85e
[ 50.060121][ C0] x86_64_start_reservations+0x29/0x2b
[ 50.065560][ C0]
[ 50.067873][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 50.074018][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
[ 50.081103][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 50.091144][ C0] ==================================================================
[ 50.099244][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 50.105825][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
[ 50.113353][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 50.123397][ C0] Call Trace:
[ 50.126684][ C0]
[ 50.129551][ C0] dump_stack+0xf5/0x159
[ 50.133785][ C0] panic+0x210/0x640
[ 50.137681][ C0] ? cpu_startup_entry+0x1b/0x20
[ 50.142614][ C0] ? vprintk_func+0x8d/0x140
[ 50.147249][ C0] kcsan_report.cold+0xc/0x1b
[ 50.151923][ C0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 50.157465][ C0] __tsan_write8+0x32/0x40
[ 50.161877][ C0] __hrtimer_run_queues+0x1f2/0x600
[ 50.167076][ C0] ? __kcsan_setup_watchpoint+0x96/0x510
[ 50.172700][ C0] hrtimer_interrupt+0x22a/0x480
[ 50.177642][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 50.183090][ C0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 50.188730][ C0] apic_timer_interrupt+0xf/0x20
[ 50.193653][ C0]
[ 50.196589][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 50.201957][ C0] 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
[ 50.221560][ C0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 50.229963][ C0] RAX: f7ced916872bb990 RBX: ffffffff85a2b780 RCX: 0000000000000792
[ 50.238053][ C0] RDX: 00000000009f4570 RSI: 020c49ba5e353f7d RDI: ffffffff85a563b8
[ 50.246107][ C0] RBP: ffffffff85a03e18 R08: 0000000000000000 R09: 0000ffff85a563bf
[ 50.254074][ C0] R10: 00000000aaaaaaab R11: ffffffff86045cc8 R12: 0000000000000000
[ 50.262037][ C0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 50.270114][ C0] ? default_idle+0x50/0x230
[ 50.274956][ C0] arch_cpu_idle+0x1f/0x30
[ 50.279385][ C0] default_idle_call+0x1e/0x40
[ 50.284154][ C0] do_idle+0x1af/0x280
[ 50.288317][ C0] cpu_startup_entry+0x1b/0x20
[ 50.293171][ C0] rest_init+0xec/0xf6
[ 50.297256][ C0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 50.304458][ C0] arch_call_rest_init+0x17/0x37
[ 50.309397][ C0] start_kernel+0x838/0x85e
[ 50.313905][ C0] x86_64_start_reservations+0x29/0x2b
[ 50.319376][ C0] x86_64_start_kernel+0x72/0x76
[ 50.324384][ C0] secondary_startup_64+0xa4/0xb0
[ 50.331158][ C0] Kernel Offset: disabled
[ 50.335501][ C0] Rebooting in 86400 seconds..