[....] 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.
[ 51.031918][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 51.031935][ T26] audit: type=1800 audit(1580371155.572:29): pid=7945 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
[ 51.058371][ T26] audit: type=1800 audit(1580371155.572:30): pid=7945 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 '10.128.0.193' (ECDSA) to the list of known hosts.
2020/01/30 07:59:25 fuzzer started
2020/01/30 07:59:27 dialing manager at 10.128.0.105:37077
2020/01/30 07:59:27 syscalls: 2900
2020/01/30 07:59:27 code coverage: enabled
2020/01/30 07:59:27 comparison tracing: enabled
2020/01/30 07:59:27 extra coverage: enabled
2020/01/30 07:59:27 setuid sandbox: enabled
2020/01/30 07:59:27 namespace sandbox: enabled
2020/01/30 07:59:27 Android sandbox: /sys/fs/selinux/policy does not exist
2020/01/30 07:59:27 fault injection: enabled
2020/01/30 07:59:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/01/30 07:59:27 net packet injection: enabled
2020/01/30 07:59:27 net device setup: enabled
2020/01/30 07:59:27 concurrency sanitizer: enabled
2020/01/30 07:59:27 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 66.651868][ C0] ==================================================================
[ 66.660012][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 66.667718][ C0]
[ 66.670044][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1:
[ 66.677597][ C0] hrtimer_active+0x84/0x1a0
[ 66.682194][ C0] task_tick_fair+0x4c/0x910
[ 66.686786][ C0] scheduler_tick+0x5f/0xf0
[ 66.691302][ C0] update_process_times+0x5a/0x80
[ 66.696325][ C0] tick_sched_handle+0x75/0x100
[ 66.701183][ C0] tick_sched_timer+0x58/0xe0
[ 66.705870][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 66.711068][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.716002][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.721460][ C0] apic_timer_interrupt+0xf/0x20
[ 66.726415][ C0] __sanitizer_cov_trace_pc+0x26/0x50
[ 66.731785][ C0] kallsyms_expand_symbol.constprop.0+0xac/0x160
[ 66.738118][ C0] kallsyms_lookup_name+0x7f/0x120
[ 66.743238][ C0] debugfs_write+0x14b/0x2d0
[ 66.747832][ C0] full_proxy_write+0xbd/0x100
[ 66.752701][ C0] __vfs_write+0x67/0xc0
[ 66.756951][ C0] vfs_write+0x18a/0x390
[ 66.761199][ C0] ksys_write+0xd5/0x1b0
[ 66.765454][ C0] __x64_sys_write+0x4c/0x60
[ 66.770048][ C0] do_syscall_64+0xcc/0x3a0
[ 66.774552][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 66.780433][ C0]
[ 66.782776][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
[ 66.790432][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 66.795642][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.800581][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.806042][ C0] apic_timer_interrupt+0xf/0x20
[ 66.811082][ C0] native_safe_halt+0xe/0x10
[ 66.815676][ C0] arch_cpu_idle+0xa/0x10
[ 66.820009][ C0] default_idle_call+0x1e/0x40
[ 66.824775][ C0] do_idle+0x1c2/0x290
[ 66.828855][ C0] cpu_startup_entry+0x1b/0x20
[ 66.833620][ C0] rest_init+0xec/0xf6
[ 66.837721][ C0] arch_call_rest_init+0x17/0x37
[ 66.842676][ C0] start_kernel+0x838/0x85e
[ 66.847183][ C0] x86_64_start_reservations+0x29/0x2b
[ 66.852646][ C0] x86_64_start_kernel+0x72/0x76
[ 66.857584][ C0] secondary_startup_64+0xa4/0xb0
[ 66.862599][ C0]
[ 66.864924][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 66.871085][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.878969][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.889020][ C0] ==================================================================
[ 66.897075][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 66.903667][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 66.911551][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 66.921605][ C0] Call Trace:
[ 66.924889][ C0]
[ 66.927751][ C0] dump_stack+0x11d/0x181
[ 66.932090][ C0] panic+0x210/0x640
[ 66.935996][ C0] ? vprintk_func+0x8d/0x140
[ 66.940591][ C0] kcsan_report.cold+0xc/0xd
[ 66.945452][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 66.950825][ C0] __tsan_unaligned_write8+0xc7/0x110
[ 66.956200][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 66.961410][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 66.967488][ C0] hrtimer_interrupt+0x22a/0x480
[ 66.972427][ C0] ? sched_clock+0x13/0x20
[ 66.976854][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 66.982321][ C0] apic_timer_interrupt+0xf/0x20
[ 66.987246][ C0]
[ 66.990195][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 66.995571][ 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
[ 67.015275][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 67.023690][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 67.031663][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 67.039635][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 67.047708][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 67.055679][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 67.063723][ C0] ? debug_smp_processor_id+0x35/0x137
[ 67.069192][ C0] ? debug_smp_processor_id+0x3e/0x137
[ 67.074705][ C0] ? default_idle+0x26/0x180
[ 67.079302][ C0] arch_cpu_idle+0xa/0x10
[ 67.083633][ C0] default_idle_call+0x1e/0x40
[ 67.088482][ C0] do_idle+0x1c2/0x290
[ 67.092558][ C0] cpu_startup_entry+0x1b/0x20
[ 67.097327][ C0] rest_init+0xec/0xf6
[ 67.101410][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 67.108606][ C0] arch_call_rest_init+0x17/0x37
[ 67.113547][ C0] start_kernel+0x838/0x85e
[ 67.118056][ C0] x86_64_start_reservations+0x29/0x2b
[ 67.123521][ C0] x86_64_start_kernel+0x72/0x76
[ 67.128460][ C0] secondary_startup_64+0xa4/0xb0
[ 67.134651][ C0] Kernel Offset: disabled
[ 67.138976][ C0] Rebooting in 86400 seconds..