[ 47.738512][ T27] audit: type=1800 audit(1580782050.319:21): pid=7827 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 47.767072][ T27] audit: type=1800 audit(1580782050.319:22): pid=7827 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.
[ 48.992871][ T7897] sshd (7897) used greatest stack depth: 10136 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.202' (ECDSA) to the list of known hosts.
2020/02/04 02:07:39 fuzzer started
2020/02/04 02:07:41 dialing manager at 10.128.0.105:41149
2020/02/04 02:07:42 syscalls: 2904
2020/02/04 02:07:42 code coverage: enabled
2020/02/04 02:07:42 comparison tracing: enabled
2020/02/04 02:07:42 extra coverage: enabled
2020/02/04 02:07:42 setuid sandbox: enabled
2020/02/04 02:07:42 namespace sandbox: enabled
2020/02/04 02:07:42 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/04 02:07:42 fault injection: enabled
2020/02/04 02:07:42 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/04 02:07:42 net packet injection: enabled
2020/02/04 02:07:42 net device setup: enabled
2020/02/04 02:07:42 concurrency sanitizer: enabled
2020/02/04 02:07:42 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 60.653847][ T7992] KCSAN: could not find function: 'poll_schedule_timeout'
[ 66.057151][ C0] ==================================================================
[ 66.065315][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 66.073038][ C0]
[ 66.075364][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1:
[ 66.082917][ C0] hrtimer_active+0x84/0x1a0
[ 66.087522][ C0] task_tick_fair+0x4c/0x910
[ 66.092119][ C0] scheduler_tick+0x5f/0xf0
[ 66.096638][ C0] update_process_times+0x5a/0x80
[ 66.101676][ C0] tick_sched_handle+0x75/0x100
[ 66.106537][ C0] tick_sched_timer+0x58/0xe0
[ 66.111221][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 66.116421][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.121365][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.126832][ C0] apic_timer_interrupt+0xf/0x20
[ 66.131777][ C0] __sanitizer_cov_trace_pc+0x14/0x50
[ 66.137156][ C0] kallsyms_expand_symbol.constprop.0+0xd8/0x160
[ 66.143492][ C0] kallsyms_lookup_name+0x7f/0x120
[ 66.148606][ C0] debugfs_write+0x14b/0x2d0
[ 66.153229][ C0] full_proxy_write+0xbd/0x100
[ 66.158001][ C0] __vfs_write+0x67/0xc0
[ 66.162252][ C0] vfs_write+0x18a/0x390
[ 66.166504][ C0] ksys_write+0xd5/0x1b0
[ 66.170857][ C0] __x64_sys_write+0x4c/0x60
[ 66.175454][ C0] do_syscall_64+0xcc/0x3a0
[ 66.179978][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 66.185860][ C0]
[ 66.188195][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
[ 66.195867][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 66.201074][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.206022][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.211472][ C0] apic_timer_interrupt+0xf/0x20
[ 66.216418][ C0] native_safe_halt+0xe/0x10
[ 66.221031][ C0] arch_cpu_idle+0xa/0x10
[ 66.225370][ C0] default_idle_call+0x1e/0x40
[ 66.230138][ C0] do_idle+0x1c2/0x290
[ 66.234211][ C0] cpu_startup_entry+0x1b/0x20
[ 66.239001][ C0] rest_init+0xec/0xf6
[ 66.243162][ C0] arch_call_rest_init+0x17/0x37
[ 66.248118][ C0] start_kernel+0x838/0x85e
[ 66.252831][ C0] x86_64_start_reservations+0x29/0x2b
[ 66.258317][ C0] x86_64_start_kernel+0x72/0x76
[ 66.263262][ C0] secondary_startup_64+0xa4/0xb0
[ 66.268275][ C0]
[ 66.270592][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 66.276852][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.284741][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.294987][ C0] ==================================================================
[ 66.303052][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 66.309706][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.317593][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.328019][ C0] Call Trace:
[ 66.331390][ C0]
[ 66.334246][ C0] dump_stack+0x11d/0x181
[ 66.338592][ C0] panic+0x210/0x640
[ 66.342494][ C0] ? vprintk_func+0x8d/0x140
[ 66.347104][ C0] kcsan_report.cold+0xc/0xd
[ 66.351698][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 66.357079][ C0] __tsan_unaligned_write8+0xc7/0x110
[ 66.362456][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 66.367661][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 66.373728][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.378688][ C0] ? sched_clock+0x13/0x20
[ 66.383122][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.388585][ C0] apic_timer_interrupt+0xf/0x20
[ 66.393522][ C0]
[ 66.396477][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 66.401865][ 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
[ 66.421467][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 66.429893][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 66.438653][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 66.446738][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 66.454716][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 66.462693][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 66.470687][ C0] ? debug_smp_processor_id+0x35/0x137
[ 66.476157][ C0] ? debug_smp_processor_id+0x3e/0x137
[ 66.481658][ C0] ? default_idle+0x26/0x180
[ 66.486274][ C0] arch_cpu_idle+0xa/0x10
[ 66.490606][ C0] default_idle_call+0x1e/0x40
[ 66.495379][ C0] do_idle+0x1c2/0x290
[ 66.499448][ C0] ? debug_smp_processor_id+0x43/0x137
[ 66.504921][ C0] cpu_startup_entry+0x1b/0x20
[ 66.509695][ C0] rest_init+0xec/0xf6
[ 66.513787][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 66.520992][ C0] arch_call_rest_init+0x17/0x37
[ 66.525943][ C0] start_kernel+0x838/0x85e
[ 66.530456][ C0] x86_64_start_reservations+0x29/0x2b
[ 66.535924][ C0] x86_64_start_kernel+0x72/0x76
[ 66.540866][ C0] secondary_startup_64+0xa4/0xb0
[ 66.597875][ C0] Kernel Offset: disabled
[ 66.602228][ C0] Rebooting in 86400 seconds..