[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 50.596637][ T7928] sshd (7928) used greatest stack depth: 10056 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 50.844014][ T27] kauditd_printk_skb: 7 callbacks suppressed
[ 50.844031][ T27] audit: type=1800 audit(1580695668.569:29): pid=7861 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
[ 50.871465][ T27] audit: type=1800 audit(1580695668.569:30): pid=7861 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 '10.128.0.143' (ECDSA) to the list of known hosts.
2020/02/03 02:07:59 fuzzer started
2020/02/03 02:08:01 dialing manager at 10.128.0.105:41149
2020/02/03 02:08:01 syscalls: 2904
2020/02/03 02:08:01 code coverage: enabled
2020/02/03 02:08:01 comparison tracing: enabled
2020/02/03 02:08:01 extra coverage: enabled
2020/02/03 02:08:01 setuid sandbox: enabled
2020/02/03 02:08:01 namespace sandbox: enabled
2020/02/03 02:08:01 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/03 02:08:01 fault injection: enabled
2020/02/03 02:08:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/03 02:08:01 net packet injection: enabled
2020/02/03 02:08:01 net device setup: enabled
2020/02/03 02:08:01 concurrency sanitizer: enabled
2020/02/03 02:08:01 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 66.717594][ C0] ==================================================================
[ 66.725858][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 66.733683][ C0]
[ 66.736091][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1:
[ 66.743743][ C0] hrtimer_active+0x84/0x1a0
[ 66.748489][ C0] task_tick_fair+0x4c/0x910
[ 66.753077][ C0] scheduler_tick+0x5f/0xf0
[ 66.757594][ C0] update_process_times+0x5a/0x80
[ 66.762750][ C0] tick_sched_handle+0x75/0x100
[ 66.767616][ C0] tick_sched_timer+0x58/0xe0
[ 66.772313][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 66.777530][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.782842][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.788308][ C0] apic_timer_interrupt+0xf/0x20
[ 66.793358][ C0] kallsyms_expand_symbol.constprop.0+0x73/0x160
[ 66.799700][ C0] kallsyms_lookup_name+0x7f/0x120
[ 66.804816][ C0] debugfs_write+0x14b/0x2d0
[ 66.809411][ C0] full_proxy_write+0xbd/0x100
[ 66.814188][ C0] __vfs_write+0x67/0xc0
[ 66.818432][ C0] vfs_write+0x18a/0x390
[ 66.822686][ C0] ksys_write+0xd5/0x1b0
[ 66.826930][ C0] __x64_sys_write+0x4c/0x60
[ 66.831524][ C0] do_syscall_64+0xcc/0x3a0
[ 66.836035][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 66.841952][ C0]
[ 66.844293][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
[ 66.851938][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 66.857271][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.862378][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.867849][ C0] apic_timer_interrupt+0xf/0x20
[ 66.872834][ C0] native_safe_halt+0xe/0x10
[ 66.877435][ C0] arch_cpu_idle+0xa/0x10
[ 66.881779][ C0] default_idle_call+0x1e/0x40
[ 66.886547][ C0] do_idle+0x1c2/0x290
[ 66.890616][ C0] cpu_startup_entry+0x1b/0x20
[ 66.895388][ C0] rest_init+0xec/0xf6
[ 66.899461][ C0] arch_call_rest_init+0x17/0x37
[ 66.904528][ C0] start_kernel+0x838/0x85e
[ 66.909043][ C0] x86_64_start_reservations+0x29/0x2b
[ 66.914639][ C0] x86_64_start_kernel+0x72/0x76
[ 66.919708][ C0] secondary_startup_64+0xa4/0xb0
[ 66.924724][ C0]
[ 66.927045][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 66.933367][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.941284][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.951341][ C0] ==================================================================
[ 66.959399][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 66.966000][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.973881][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.984061][ C0] Call Trace:
[ 66.987349][ C0]
[ 66.990204][ C0] dump_stack+0x11d/0x181
[ 66.994556][ C0] panic+0x210/0x640
[ 66.998472][ C0] ? vprintk_func+0x8d/0x140
[ 67.003099][ C0] kcsan_report.cold+0xc/0xd
[ 67.007695][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 67.013075][ C0] __tsan_unaligned_write8+0xc7/0x110
[ 67.018451][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 67.023702][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 67.029781][ C0] hrtimer_interrupt+0x22a/0x480
[ 67.034723][ C0] ? sched_clock+0x13/0x20
[ 67.039147][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 67.044625][ C0] apic_timer_interrupt+0xf/0x20
[ 67.049570][ C0]
[ 67.053582][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 67.059436][ 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
[ 67.079223][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 67.087645][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 67.095704][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 67.103994][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 67.111970][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 67.120059][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 67.128069][ C0] ? debug_smp_processor_id+0x35/0x137
[ 67.133544][ C0] ? debug_smp_processor_id+0x3e/0x137
[ 67.139011][ C0] ? default_idle+0x26/0x180
[ 67.143641][ C0] arch_cpu_idle+0xa/0x10
[ 67.148163][ C0] default_idle_call+0x1e/0x40
[ 67.152928][ C0] do_idle+0x1c2/0x290
[ 67.156996][ C0] ? debug_smp_processor_id+0x43/0x137
[ 67.162471][ C0] cpu_startup_entry+0x1b/0x20
[ 67.167242][ C0] rest_init+0xec/0xf6
[ 67.171332][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 67.178547][ C0] arch_call_rest_init+0x17/0x37
[ 67.183497][ C0] start_kernel+0x838/0x85e
[ 67.188008][ C0] x86_64_start_reservations+0x29/0x2b
[ 67.193481][ C0] x86_64_start_kernel+0x72/0x76
[ 67.198440][ C0] secondary_startup_64+0xa4/0xb0
[ 67.384082][ C0] Kernel Offset: disabled
[ 67.388436][ C0] Rebooting in 86400 seconds..