[....] 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.
[ 56.084985][ T27] kauditd_printk_skb: 7 callbacks suppressed
[ 56.085002][ T27] audit: type=1800 audit(1581002635.838:29): pid=7880 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
[ 56.111444][ T27] audit: type=1800 audit(1581002635.838:30): pid=7880 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 '10.128.10.24' (ECDSA) to the list of known hosts.
2020/02/06 15:24:06 fuzzer started
2020/02/06 15:24:08 dialing manager at 10.128.0.105:36111
2020/02/06 15:24:08 syscalls: 2904
2020/02/06 15:24:08 code coverage: enabled
2020/02/06 15:24:08 comparison tracing: enabled
2020/02/06 15:24:08 extra coverage: enabled
2020/02/06 15:24:08 setuid sandbox: enabled
2020/02/06 15:24:08 namespace sandbox: enabled
2020/02/06 15:24:08 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/06 15:24:08 fault injection: enabled
2020/02/06 15:24:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/06 15:24:08 net packet injection: enabled
2020/02/06 15:24:08 net device setup: enabled
2020/02/06 15:24:08 concurrency sanitizer: enabled
2020/02/06 15:24:08 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 70.752414][ T0] ==================================================================
[ 70.760615][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 70.769564][ T0]
[ 70.771898][ T0] write to 0xffffffff8624c7c8 of 8 bytes by interrupt on cpu 1:
[ 70.779551][ T0] tick_do_update_jiffies64+0x100/0x250
[ 70.785134][ T0] tick_sched_do_timer+0xd4/0xe0
[ 70.790098][ T0] tick_sched_timer+0x43/0xe0
[ 70.794807][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 70.800046][ T0] hrtimer_interrupt+0x22a/0x480
[ 70.804986][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.810505][ T0] apic_timer_interrupt+0xf/0x20
[ 70.815460][ T0] kcsan_setup_watchpoint+0x1d4/0x460
[ 70.820855][ T0] __tsan_unaligned_write1+0xc3/0x100
[ 70.826242][ T0] kallsyms_expand_symbol.constprop.0+0xe8/0x160
[ 70.832594][ T0] kallsyms_lookup_name+0x7f/0x120
[ 70.837743][ T0] debugfs_write+0x14b/0x2d0
[ 70.842389][ T0] full_proxy_write+0xbd/0x100
[ 70.847192][ T0] __vfs_write+0x67/0xc0
[ 70.851451][ T0] vfs_write+0x18a/0x390
[ 70.855728][ T0] ksys_write+0xd5/0x1b0
[ 70.860007][ T0] __x64_sys_write+0x4c/0x60
[ 70.864621][ T0] do_syscall_64+0xcc/0x3a0
[ 70.869149][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 70.875058][ T0]
[ 70.877411][ T0] read to 0xffffffff8624c7c8 of 8 bytes by task 0 on cpu 0:
[ 70.884718][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 70.890192][ T0] tick_irq_enter+0x139/0x1c0
[ 70.894907][ T0] irq_enter+0x4f/0x60
[ 70.899054][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 70.904534][ T0] apic_timer_interrupt+0xf/0x20
[ 70.909480][ T0] native_safe_halt+0xe/0x10
[ 70.914098][ T0] arch_cpu_idle+0xa/0x10
[ 70.918459][ T0] default_idle_call+0x1e/0x40
[ 70.923245][ T0] do_idle+0x1c2/0x290
[ 70.927341][ T0] cpu_startup_entry+0x1b/0x20
[ 70.932125][ T0] rest_init+0xec/0xf6
[ 70.936314][ T0] arch_call_rest_init+0x17/0x37
[ 70.941258][ T0] start_kernel+0x838/0x85e
[ 70.946147][ T0] x86_64_start_reservations+0x29/0x2b
[ 70.951643][ T0] x86_64_start_kernel+0x72/0x76
[ 70.956602][ T0] secondary_startup_64+0xa4/0xb0
[ 70.961616][ T0]
[ 70.963947][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 70.970122][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 70.978038][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.988109][ T0] ==================================================================
[ 70.996174][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 71.002806][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 71.010707][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 71.020861][ T0] Call Trace:
[ 71.024212][ T0]
[ 71.027085][ T0] dump_stack+0x11d/0x181
[ 71.031448][ T0] panic+0x210/0x640
[ 71.035372][ T0] ? vprintk_func+0x8d/0x140
[ 71.039995][ T0] kcsan_report.cold+0xc/0xd
[ 71.044603][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 71.050024][ T0] __tsan_read8+0xc6/0x100
[ 71.054489][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 71.059990][ T0] tick_irq_enter+0x139/0x1c0
[ 71.064689][ T0] irq_enter+0x4f/0x60
[ 71.068788][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 71.074308][ T0] apic_timer_interrupt+0xf/0x20
[ 71.079293][ T0]
[ 71.082260][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 71.087657][ T0] 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
[ 71.107357][ T0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 71.115789][ T0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 71.123768][ T0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 71.131759][ T0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 71.139736][ T0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 71.147723][ T0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 71.155894][ T0] ? debug_smp_processor_id+0x35/0x137
[ 71.161461][ T0] ? debug_smp_processor_id+0x3e/0x137
[ 71.166952][ T0] ? default_idle+0x26/0x180
[ 71.171553][ T0] arch_cpu_idle+0xa/0x10
[ 71.175913][ T0] default_idle_call+0x1e/0x40
[ 71.180690][ T0] do_idle+0x1c2/0x290
[ 71.184773][ T0] ? debug_smp_processor_id+0x43/0x137
[ 71.190466][ T0] cpu_startup_entry+0x1b/0x20
[ 71.195244][ T0] rest_init+0xec/0xf6
[ 71.199346][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 71.206571][ T0] arch_call_rest_init+0x17/0x37
[ 71.211520][ T0] start_kernel+0x838/0x85e
[ 71.216055][ T0] x86_64_start_reservations+0x29/0x2b
[ 71.221588][ T0] x86_64_start_kernel+0x72/0x76
[ 71.226580][ T0] secondary_startup_64+0xa4/0xb0
[ 71.349000][ T0] Kernel Offset: disabled
[ 71.353362][ T0] Rebooting in 86400 seconds..