[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 42.307522][ T26] audit: type=1800 audit(1573548834.607:21): pid=7448 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 42.348806][ T26] audit: type=1800 audit(1573548834.607:22): pid=7448 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 '10.128.1.18' (ECDSA) to the list of known hosts.
2019/11/12 08:54:06 fuzzer started
2019/11/12 08:54:07 dialing manager at 10.128.0.105:45453
2019/11/12 08:54:08 syscalls: 2566
2019/11/12 08:54:08 code coverage: enabled
2019/11/12 08:54:08 comparison tracing: enabled
2019/11/12 08:54:08 extra coverage: extra coverage is not supported by the kernel
2019/11/12 08:54:08 setuid sandbox: enabled
2019/11/12 08:54:08 namespace sandbox: enabled
2019/11/12 08:54:08 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/12 08:54:08 fault injection: enabled
2019/11/12 08:54:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/12 08:54:08 net packet injection: enabled
2019/11/12 08:54:08 net device setup: enabled
2019/11/12 08:54:08 concurrency sanitizer: enabled
2019/11/12 08:54:08 devlink PCI setup: PCI device 0000:00:10.0 is not available
2019/11/12 08:54:12 adding functions to KCSAN blacklist: '__ext4_new_inode' 'run_timer_softirq' 'do_nanosleep' '__hrtimer_run_queues' 'blk_mq_dispatch_rq_list' 'tomoyo_supervisor' 'pipe_poll' 'generic_write_end' 'tick_sched_do_timer' 'vfs_fsync_range' 'find_get_pages_range_tag' 'kauditd_thread' 'mod_timer' 'pid_update_inode' 'generic_file_read_iter' 'ep_poll' 'vm_area_dup' 'blk_mq_free_request' 'blk_mq_sched_dispatch_requests' 'find_next_bit' 'tcp_add_backlog' 'taskstats_exit' 'xas_clear_mark'
syzkaller login: [ 75.332438][ T0] ==================================================================
[ 75.340593][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 75.349512][ T0]
[ 75.351847][ T0] write to 0xffffffff86046008 of 8 bytes by task 0 on cpu 1:
[ 75.359224][ T0] tick_do_update_jiffies64+0x100/0x250
[ 75.364774][ T0] tick_irq_enter+0x139/0x1c0
[ 75.369453][ T0] irq_enter+0x4f/0x60
[ 75.373519][ T0] do_IRQ+0x51/0x180
[ 75.377452][ T0] ret_from_intr+0x0/0x19
[ 75.381791][ T0] native_safe_halt+0xe/0x10
[ 75.386385][ T0] arch_cpu_idle+0x1f/0x30
[ 75.390801][ T0] default_idle_call+0x1e/0x40
[ 75.395569][ T0] do_idle+0x1af/0x280
[ 75.399640][ T0] cpu_startup_entry+0x1b/0x20
[ 75.404404][ T0] start_secondary+0x208/0x260
[ 75.409166][ T0] secondary_startup_64+0xa4/0xb0
[ 75.414175][ T0]
[ 75.416510][ T0] read to 0xffffffff86046008 of 8 bytes by task 0 on cpu 0:
[ 75.423799][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 75.429254][ T0] tick_irq_enter+0x139/0x1c0
[ 75.433915][ T0] irq_enter+0x4f/0x60
[ 75.437973][ T0] do_IRQ+0x51/0x180
[ 75.441868][ T0] ret_from_intr+0x0/0x19
[ 75.446194][ T0] native_safe_halt+0xe/0x10
[ 75.450779][ T0] arch_cpu_idle+0x1f/0x30
[ 75.455205][ T0] default_idle_call+0x1e/0x40
[ 75.459972][ T0] do_idle+0x1af/0x280
[ 75.464038][ T0] cpu_startup_entry+0x1b/0x20
[ 75.468788][ T0] rest_init+0xec/0xf6
[ 75.472850][ T0] arch_call_rest_init+0x17/0x37
[ 75.477799][ T0] start_kernel+0x838/0x85e
[ 75.482300][ T0] x86_64_start_reservations+0x29/0x2b
[ 75.487760][ T0] x86_64_start_kernel+0x72/0x76
[ 75.492710][ T0] secondary_startup_64+0xa4/0xb0
[ 75.497718][ T0]
[ 75.500027][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 75.506189][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 75.513269][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 75.523324][ T0] ==================================================================
[ 75.531370][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 75.537958][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0
[ 75.545066][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 75.555118][ T0] Call Trace:
[ 75.558398][ T0]
[ 75.561243][ T0] dump_stack+0x11d/0x181
[ 75.565568][ T0] panic+0x210/0x640
[ 75.569478][ T0] ? vprintk_func+0x8d/0x140
[ 75.574068][ T0] kcsan_report.cold+0xc/0x1a
[ 75.578739][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 75.584110][ T0] __tsan_read8+0xc6/0x100
[ 75.588537][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 75.593995][ T0] tick_irq_enter+0x139/0x1c0
[ 75.598670][ T0] irq_enter+0x4f/0x60
[ 75.602742][ T0] do_IRQ+0x51/0x180
[ 75.606642][ T0] common_interrupt+0xf/0xf
[ 75.611132][ T0]
[ 75.614055][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 75.619409][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 6c 52 47 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 5c 52 47 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 d2 9a 9f fc e8 bd 3f b5 fd 0f
[ 75.639004][ T0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd6
[ 75.647431][ T0] RAX: 0000000000000017 RBX: ffffffff85a2b780 RCX: ffffffff86049ce8
[ 75.655390][ T0] RDX: 0000000000000000 RSI: ffffffff82506027 RDI: ffffffff85a56378
[ 75.663445][ T0] RBP: ffffffff85a03e18 R08: 0000000000000000 R09: 0000ffff85a56378
[ 75.671411][ T0] R10: 000088812bf2d99d R11: 0000ffff85a5637f R12: 0000000000000000
[ 75.679385][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 75.687373][ T0] ? debug_smp_processor_id+0x47/0x172
[ 75.692837][ T0] ? default_idle+0x50/0x230
[ 75.697454][ T0] arch_cpu_idle+0x1f/0x30
[ 75.701870][ T0] default_idle_call+0x1e/0x40
[ 75.706629][ T0] do_idle+0x1af/0x280
[ 75.710706][ T0] cpu_startup_entry+0x1b/0x20
[ 75.715478][ T0] rest_init+0xec/0xf6
[ 75.719555][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 75.726741][ T0] arch_call_rest_init+0x17/0x37
[ 75.731669][ T0] start_kernel+0x838/0x85e
[ 75.736154][ T0] x86_64_start_reservations+0x29/0x2b
[ 75.741710][ T0] x86_64_start_kernel+0x72/0x76
[ 75.746655][ T0] secondary_startup_64+0xa4/0xb0
[ 75.753009][ T0] Kernel Offset: disabled
[ 75.757332][ T0] Rebooting in 86400 seconds..