[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 44.931585][ T26] audit: type=1800 audit(1573981767.693:21): pid=7530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 44.967115][ T26] audit: type=1800 audit(1573981767.693:22): pid=7530 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 '10.128.0.236' (ECDSA) to the list of known hosts.
2019/11/17 09:09:37 fuzzer started
2019/11/17 09:09:39 dialing manager at 10.128.0.105:33487
2019/11/17 09:09:39 syscalls: 2566
2019/11/17 09:09:39 code coverage: enabled
2019/11/17 09:09:39 comparison tracing: enabled
2019/11/17 09:09:39 extra coverage: extra coverage is not supported by the kernel
2019/11/17 09:09:39 setuid sandbox: enabled
2019/11/17 09:09:39 namespace sandbox: enabled
2019/11/17 09:09:39 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/17 09:09:39 fault injection: enabled
2019/11/17 09:09:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/17 09:09:39 net packet injection: enabled
2019/11/17 09:09:39 net device setup: enabled
2019/11/17 09:09:39 concurrency sanitizer: enabled
2019/11/17 09:09:39 devlink PCI setup: PCI device 0000:00:10.0 is not available
2019/11/17 09:09:42 adding functions to KCSAN blacklist: 'blk_mq_dispatch_rq_list' 'tcp_add_backlog' 'ext4_has_free_clusters' 'find_get_pages_range_tag' 'find_next_bit' 'do_nanosleep' 'pipe_poll' 'wbt_done' '__hrtimer_run_queues' 'ep_poll' 'ext4_free_inode' 'run_timer_softirq' 'filemap_map_pages' 'xas_clear_mark' '__ext4_new_inode' 'mod_timer' 'blk_mq_get_request' 'tomoyo_supervisor' 'rcu_gp_fqs_check_wake' 'tick_nohz_idle_stop_tick' 'blk_mq_sched_dispatch_requests' 'tick_do_update_jiffies64'
syzkaller login: [ 70.294111][ C0] ==================================================================
[ 70.302540][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 70.310578][ C0]
[ 70.312983][ C0] read to 0xffffffff85cb3ad0 of 4 bytes by interrupt on cpu 1:
[ 70.320521][ C0] tick_sched_do_timer+0x33/0xe0
[ 70.325451][ C0] tick_sched_timer+0x43/0xe0
[ 70.330109][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 70.335299][ C0] hrtimer_interrupt+0x22a/0x480
[ 70.340230][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.345664][ C0] apic_timer_interrupt+0xf/0x20
[ 70.351526][ C0]
[ 70.353851][ C0] write to 0xffffffff85cb3ad0 of 4 bytes by interrupt on cpu 0:
[ 70.361461][ C0] tick_sched_do_timer+0xc0/0xe0
[ 70.366414][ C0] tick_sched_timer+0x43/0xe0
[ 70.371129][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 70.376368][ C0] hrtimer_interrupt+0x22a/0x480
[ 70.381409][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.386978][ C0] apic_timer_interrupt+0xf/0x20
[ 70.391956][ C0] native_safe_halt+0xe/0x10
[ 70.396536][ C0] arch_cpu_idle+0xa/0x10
[ 70.400850][ C0] default_idle_call+0x1e/0x40
[ 70.405608][ C0] do_idle+0x1af/0x280
[ 70.409660][ C0] cpu_startup_entry+0x1b/0x20
[ 70.414438][ C0] rest_init+0xec/0xf6
[ 70.418497][ C0] arch_call_rest_init+0x17/0x37
[ 70.423415][ C0] start_kernel+0x838/0x85e
[ 70.427897][ C0] x86_64_start_reservations+0x29/0x2b
[ 70.433342][ C0] x86_64_start_kernel+0x72/0x76
[ 70.438271][ C0] secondary_startup_64+0xa4/0xb0
[ 70.443286][ C0]
[ 70.445591][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 70.451746][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 70.458831][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.468873][ C0] ==================================================================
[ 70.477011][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 70.483580][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 70.490664][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.500705][ C0] Call Trace:
[ 70.503977][ C0]
[ 70.506826][ C0] dump_stack+0x11d/0x181
[ 70.511149][ C0] panic+0x210/0x640
[ 70.515024][ C0] ? vprintk_func+0x8d/0x140
[ 70.519611][ C0] kcsan_report.cold+0xc/0xd
[ 70.524185][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 70.529539][ C0] __tsan_unaligned_write4+0xc4/0x100
[ 70.534903][ C0] tick_sched_do_timer+0xc0/0xe0
[ 70.539843][ C0] tick_sched_timer+0x43/0xe0
[ 70.544503][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 70.549679][ C0] ? tick_sched_handle+0x100/0x100
[ 70.554772][ C0] hrtimer_interrupt+0x22a/0x480
[ 70.559703][ C0] ? sched_clock+0x13/0x20
[ 70.564121][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.569560][ C0] apic_timer_interrupt+0xf/0x20
[ 70.574472][ C0]
[ 70.577394][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 70.582750][ C0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d fc c9 48 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d ec c9 48 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 82 89 9f fc e8 8d 30 b5 fd 0f
[ 70.602348][ C0] RSP: 0018:ffffffff85a03df8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 70.610758][ C0] RAX: 0000000000000000 RBX: ffffffff85a2b780 RCX: ffffffff824edc99
[ 70.618723][ C0] RDX: 0000000000000000 RSI: ffffffff824edca7 RDI: 0000000000000005
[ 70.626782][ C0] RBP: ffffffff85a03e18 R08: ffffffff85a2b780 R09: 0000ffff857d1160
[ 70.634772][ C0] R10: 0000000000000000 R11: 0000ffff857d1167 R12: 0000000000000000
[ 70.642741][ C0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 70.650715][ C0] ? debug_smp_processor_id+0x39/0x172
[ 70.656154][ C0] ? debug_smp_processor_id+0x47/0x172
[ 70.661608][ C0] ? default_idle+0x26/0x180
[ 70.666179][ C0] arch_cpu_idle+0xa/0x10
[ 70.670500][ C0] default_idle_call+0x1e/0x40
[ 70.675254][ C0] do_idle+0x1af/0x280
[ 70.679566][ C0] cpu_startup_entry+0x1b/0x20
[ 70.684309][ C0] rest_init+0xec/0xf6
[ 70.688376][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 70.695567][ C0] arch_call_rest_init+0x17/0x37
[ 70.700497][ C0] start_kernel+0x838/0x85e
[ 70.704994][ C0] x86_64_start_reservations+0x29/0x2b
[ 70.710446][ C0] x86_64_start_kernel+0x72/0x76
[ 70.715378][ C0] secondary_startup_64+0xa4/0xb0
[ 70.721845][ C0] Kernel Offset: disabled
[ 70.726205][ C0] Rebooting in 86400 seconds..