[....] 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.
[ 55.402978][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 55.403003][ T26] audit: type=1800 audit(1580806811.422:29): pid=7856 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0
[ 55.429367][ T26] audit: type=1800 audit(1580806811.422:30): pid=7856 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.220' (ECDSA) to the list of known hosts.
2020/02/04 09:00:22 fuzzer started
2020/02/04 09:00:25 dialing manager at 10.128.0.105:41149
2020/02/04 09:00:25 syscalls: 2904
2020/02/04 09:00:25 code coverage: enabled
2020/02/04 09:00:25 comparison tracing: enabled
2020/02/04 09:00:25 extra coverage: enabled
2020/02/04 09:00:25 setuid sandbox: enabled
2020/02/04 09:00:25 namespace sandbox: enabled
2020/02/04 09:00:25 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/04 09:00:25 fault injection: enabled
2020/02/04 09:00:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/04 09:00:25 net packet injection: enabled
2020/02/04 09:00:25 net device setup: enabled
2020/02/04 09:00:25 concurrency sanitizer: enabled
2020/02/04 09:00:25 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 70.689233][ C0] ==================================================================
[ 70.697512][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 70.705913][ C0]
[ 70.708251][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1:
[ 70.715803][ C0] hrtimer_active+0x84/0x1a0
[ 70.720394][ C0] task_tick_fair+0x4c/0x910
[ 70.724976][ C0] scheduler_tick+0x5f/0xf0
[ 70.729746][ C0] update_process_times+0x5a/0x80
[ 70.734779][ C0] tick_sched_handle+0x75/0x100
[ 70.739638][ C0] tick_sched_timer+0x58/0xe0
[ 70.744329][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 70.749526][ C0] hrtimer_interrupt+0x22a/0x480
[ 70.754466][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.759930][ C0] apic_timer_interrupt+0xf/0x20
[ 70.764863][ C0] kcsan_setup_watchpoint+0x1d4/0x460
[ 70.770240][ C0] __tsan_read1+0xc2/0x100
[ 70.774671][ C0] kallsyms_expand_symbol.constprop.0+0x70/0x160
[ 70.781028][ C0] kallsyms_lookup_name+0x7f/0x120
[ 70.786145][ C0] debugfs_write+0x14b/0x2d0
[ 70.790784][ C0] full_proxy_write+0xbd/0x100
[ 70.795641][ C0] __vfs_write+0x67/0xc0
[ 70.800090][ C0] vfs_write+0x18a/0x390
[ 70.804345][ C0] ksys_write+0xd5/0x1b0
[ 70.808592][ C0] __x64_sys_write+0x4c/0x60
[ 70.813197][ C0] do_syscall_64+0xcc/0x3a0
[ 70.817733][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 70.823614][ C0]
[ 70.825940][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
[ 70.833585][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 70.838824][ C0] hrtimer_interrupt+0x22a/0x480
[ 70.843780][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.849681][ C0] apic_timer_interrupt+0xf/0x20
[ 70.854664][ C0] native_safe_halt+0xe/0x10
[ 70.859263][ C0] arch_cpu_idle+0xa/0x10
[ 70.863587][ C0] default_idle_call+0x1e/0x40
[ 70.868352][ C0] do_idle+0x1c2/0x290
[ 70.872429][ C0] cpu_startup_entry+0x1b/0x20
[ 70.877206][ C0] rest_init+0xec/0xf6
[ 70.881289][ C0] arch_call_rest_init+0x17/0x37
[ 70.886231][ C0] start_kernel+0x838/0x85e
[ 70.890757][ C0] x86_64_start_reservations+0x29/0x2b
[ 70.896222][ C0] x86_64_start_kernel+0x72/0x76
[ 70.901311][ C0] secondary_startup_64+0xa4/0xb0
[ 70.906343][ C0]
[ 70.908667][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 70.914846][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 70.922829][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.933005][ C0] ==================================================================
[ 70.941165][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 70.947758][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 70.955758][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.965822][ C0] Call Trace:
[ 70.969103][ C0]
[ 70.972057][ C0] dump_stack+0x11d/0x181
[ 70.976401][ C0] panic+0x210/0x640
[ 70.980396][ C0] ? vprintk_func+0x8d/0x140
[ 70.985113][ C0] kcsan_report.cold+0xc/0xd
[ 70.989720][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 70.995108][ C0] __tsan_unaligned_write8+0xc7/0x110
[ 71.000505][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 71.005865][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 71.012377][ C0] hrtimer_interrupt+0x22a/0x480
[ 71.017330][ C0] ? sched_clock+0x13/0x20
[ 71.021775][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 71.027256][ C0] apic_timer_interrupt+0xf/0x20
[ 71.032188][ C0]
[ 71.035130][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 71.040511][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 4c e6 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 3c e6 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 d2 57 91 fc e8 fd da ab fd 0f
[ 71.060306][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 71.069162][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 71.077136][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 71.085126][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 71.093120][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 71.101094][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 71.109219][ C0] ? debug_smp_processor_id+0x35/0x137
[ 71.114780][ C0] ? debug_smp_processor_id+0x3e/0x137
[ 71.120428][ C0] ? default_idle+0x26/0x180
[ 71.125020][ C0] arch_cpu_idle+0xa/0x10
[ 71.129365][ C0] default_idle_call+0x1e/0x40
[ 71.134131][ C0] do_idle+0x1c2/0x290
[ 71.138223][ C0] ? debug_smp_processor_id+0x43/0x137
[ 71.143704][ C0] cpu_startup_entry+0x1b/0x20
[ 71.148584][ C0] rest_init+0xec/0xf6
[ 71.152661][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 71.159873][ C0] arch_call_rest_init+0x17/0x37
[ 71.164819][ C0] start_kernel+0x838/0x85e
[ 71.169352][ C0] x86_64_start_reservations+0x29/0x2b
[ 71.174831][ C0] x86_64_start_kernel+0x72/0x76
[ 71.179785][ C0] secondary_startup_64+0xa4/0xb0
[ 71.259685][ C0] Kernel Offset: disabled
[ 71.264130][ C0] Rebooting in 86400 seconds..