[....] 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.
[ 61.616431][ T27] kauditd_printk_skb: 8 callbacks suppressed
[ 61.616448][ T27] audit: type=1800 audit(1581273792.467:29): pid=7766 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
[ 61.642550][ T27] audit: type=1800 audit(1581273792.467:30): pid=7766 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 '10.128.1.40' (ECDSA) to the list of known hosts.
2020/02/09 18:43:19 fuzzer started
2020/02/09 18:43:21 dialing manager at 10.128.0.105:44667
2020/02/09 18:43:21 syscalls: 2904
2020/02/09 18:43:21 code coverage: enabled
2020/02/09 18:43:21 comparison tracing: enabled
2020/02/09 18:43:21 extra coverage: enabled
2020/02/09 18:43:21 setuid sandbox: enabled
2020/02/09 18:43:21 namespace sandbox: enabled
2020/02/09 18:43:21 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/09 18:43:21 fault injection: enabled
2020/02/09 18:43:21 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/09 18:43:21 net packet injection: enabled
2020/02/09 18:43:21 net device setup: enabled
2020/02/09 18:43:21 concurrency sanitizer: enabled
2020/02/09 18:43:21 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 72.614898][ T0] ==================================================================
[ 72.623205][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 72.632128][ T0]
[ 72.634455][ T0] write to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 0:
[ 72.642092][ T0] tick_do_update_jiffies64+0x100/0x250
[ 72.647643][ T0] tick_sched_do_timer+0xd4/0xe0
[ 72.652587][ T0] tick_sched_timer+0x43/0xe0
[ 72.657279][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 72.662502][ T0] hrtimer_interrupt+0x22a/0x480
[ 72.667458][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 72.672908][ T0] apic_timer_interrupt+0xf/0x20
[ 72.677849][ T0] kcsan_setup_watchpoint+0x211/0x380
[ 72.683220][ T0] __tsan_read1+0xc2/0x100
[ 72.687699][ T0] kallsyms_expand_symbol.constprop.0+0x70/0x160
[ 72.694036][ T0] kallsyms_lookup_name+0x7f/0x120
[ 72.699141][ T0] debugfs_write+0x16c/0x320
[ 72.703739][ T0] full_proxy_write+0xbd/0x100
[ 72.708503][ T0] __vfs_write+0x67/0xc0
[ 72.712751][ T0] vfs_write+0x18a/0x390
[ 72.717001][ T0] ksys_write+0xd5/0x1b0
[ 72.721299][ T0] __x64_sys_write+0x4c/0x60
[ 72.725913][ T0] do_syscall_64+0xcc/0x3a0
[ 72.730419][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 72.736301][ T0]
[ 72.738628][ T0] read to 0xffffffff8624d7c8 of 8 bytes by task 0 on cpu 1:
[ 72.745926][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 72.751387][ T0] tick_irq_enter+0x139/0x1c0
[ 72.756068][ T0] irq_enter+0x4f/0x60
[ 72.760135][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 72.765596][ T0] apic_timer_interrupt+0xf/0x20
[ 72.770541][ T0] native_safe_halt+0xe/0x10
[ 72.775164][ T0] arch_cpu_idle+0xa/0x10
[ 72.779513][ T0] default_idle_call+0x1e/0x40
[ 72.784275][ T0] do_idle+0x1c2/0x290
[ 72.788699][ T0] cpu_startup_entry+0x1b/0x20
[ 72.793460][ T0] start_secondary+0x168/0x1b0
[ 72.798224][ T0] secondary_startup_64+0xa4/0xb0
[ 72.803233][ T0]
[ 72.805553][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 72.811713][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 72.819606][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 72.829762][ T0] ==================================================================
[ 72.837822][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 72.844415][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 72.852302][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 72.862352][ T0] Call Trace:
[ 72.865626][ T0]
[ 72.868500][ T0] dump_stack+0x11d/0x181
[ 72.872833][ T0] panic+0x210/0x640
[ 72.876723][ T0] ? vprintk_func+0x8d/0x140
[ 72.881375][ T0] kcsan_report.cold+0xc/0x15
[ 72.886066][ T0] kcsan_setup_watchpoint+0x2e2/0x380
[ 72.891441][ T0] __tsan_read8+0xc6/0x100
[ 72.895868][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 72.901331][ T0] tick_irq_enter+0x139/0x1c0
[ 72.906022][ T0] irq_enter+0x4f/0x60
[ 72.910090][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 72.915555][ T0] apic_timer_interrupt+0xf/0x20
[ 72.920480][ T0]
[ 72.923433][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 72.928814][ T0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 1c 71 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 0c 71 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 a2 e9 90 fc e8 ed 84 ab fd 0f
[ 72.948424][ T0] RSP: 0018:ffffc90000cd3e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 72.956843][ T0] RAX: 0000000000000001 RBX: ffff88812b785040 RCX: ffffffff82548b75
[ 72.964816][ T0] RDX: 0000000000000000 RSI: ffffffff82548b7e RDI: 0000000000000005
[ 72.973144][ T0] RBP: ffffc90000cd3e90 R08: ffff88812b785040 R09: 0000ffff85a2d168
[ 72.981118][ T0] R10: 0000c90000cd3e80 R11: 0000ffff85a2d16f R12: 0000000000000001
[ 72.989085][ T0] R13: ffff88812b785040 R14: 0000000000000000 R15: 0000000000000000
[ 72.997076][ T0] ? debug_smp_processor_id+0x35/0x137
[ 73.002543][ T0] ? debug_smp_processor_id+0x3e/0x137
[ 73.008018][ T0] ? default_idle+0x26/0x180
[ 73.012971][ T0] arch_cpu_idle+0xa/0x10
[ 73.017297][ T0] default_idle_call+0x1e/0x40
[ 73.022063][ T0] do_idle+0x1c2/0x290
[ 73.026128][ T0] ? complete+0x44/0x50
[ 73.030296][ T0] cpu_startup_entry+0x1b/0x20
[ 73.035070][ T0] start_secondary+0x168/0x1b0
[ 73.039842][ T0] secondary_startup_64+0xa4/0xb0
[ 73.046262][ T0] Kernel Offset: disabled
[ 73.050633][ T0] Rebooting in 86400 seconds..