[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 64.578133][ T26] audit: type=1800 audit(1573446481.156:25): pid=7891 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 64.598352][ T26] audit: type=1800 audit(1573446481.166:26): pid=7891 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 64.633972][ T26] audit: type=1800 audit(1573446481.166:27): pid=7891 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] 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.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts.
2019/11/11 04:28:13 fuzzer started
2019/11/11 04:28:14 dialing manager at 10.128.0.105:33901
2019/11/11 04:28:15 syscalls: 2553
2019/11/11 04:28:15 code coverage: enabled
2019/11/11 04:28:15 comparison tracing: enabled
2019/11/11 04:28:15 extra coverage: extra coverage is not supported by the kernel
2019/11/11 04:28:15 setuid sandbox: enabled
2019/11/11 04:28:15 namespace sandbox: enabled
2019/11/11 04:28:15 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/11 04:28:15 fault injection: enabled
2019/11/11 04:28:15 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/11 04:28:15 net packet injection: enabled
2019/11/11 04:28:15 net device setup: enabled
2019/11/11 04:28:15 concurrency sanitizer: enabled
2019/11/11 04:28:15 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 85.221458][ T0] ==================================================================
[ 85.229626][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 85.238550][ T0]
[ 85.240885][ T0] write to 0xffffffff86043008 of 8 bytes by interrupt on cpu 1:
[ 85.248558][ T0] tick_do_update_jiffies64+0x100/0x250
[ 85.254109][ T0] tick_sched_do_timer+0xd4/0xe0
[ 85.259065][ T0] tick_sched_timer+0x43/0xe0
[ 85.263750][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 85.269233][ T0] hrtimer_interrupt+0x22a/0x480
[ 85.274195][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 85.279667][ T0] apic_timer_interrupt+0xf/0x20
[ 85.284690][ T0] kcsan_setup_watchpoint+0x205/0x410
[ 85.290059][ T0] __tsan_read1+0x13f/0x1e0
[ 85.294573][ T0] kallsyms_expand_symbol.constprop.0+0x103/0x160
[ 85.301154][ T0] kallsyms_lookup_name+0x7f/0x120
[ 85.306368][ T0] debugfs_write+0x14b/0x2d0
[ 85.311048][ T0] full_proxy_write+0xbd/0x100
[ 85.315816][ T0] __vfs_write+0x67/0xc0
[ 85.320058][ T0] vfs_write+0x18a/0x390
[ 85.324298][ T0] ksys_write+0xd5/0x1b0
[ 85.328553][ T0] __x64_sys_write+0x4c/0x60
[ 85.333234][ T0] do_syscall_64+0xcc/0x370
[ 85.338011][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 85.343894][ T0]
[ 85.346228][ T0] read to 0xffffffff86043008 of 8 bytes by task 0 on cpu 0:
[ 85.353616][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 85.359127][ T0] tick_irq_enter+0x139/0x1c0
[ 85.363803][ T0] irq_enter+0x4f/0x60
[ 85.367879][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 85.373334][ T0] apic_timer_interrupt+0xf/0x20
[ 85.378266][ T0] native_safe_halt+0xe/0x10
[ 85.382859][ T0] arch_cpu_idle+0x1f/0x30
[ 85.387275][ T0] default_idle_call+0x1e/0x40
[ 85.392041][ T0] do_idle+0x1af/0x280
[ 85.396131][ T0] cpu_startup_entry+0x1b/0x20
[ 85.400901][ T0] rest_init+0xec/0xf6
[ 85.405027][ T0] arch_call_rest_init+0x17/0x37
[ 85.409983][ T0] start_kernel+0x838/0x85e
[ 85.414492][ T0] x86_64_start_reservations+0x29/0x2b
[ 85.419954][ T0] x86_64_start_kernel+0x72/0x76
[ 85.424889][ T0] secondary_startup_64+0xa4/0xb0
[ 85.429908][ T0]
[ 85.432226][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 85.438384][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0
[ 85.445492][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 85.456057][ T0] ==================================================================
[ 85.464284][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 85.471113][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0
[ 85.478219][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 85.488359][ T0] Call Trace:
[ 85.491645][ T0]
[ 85.494517][ T0] dump_stack+0xf5/0x159
[ 85.498768][ T0] panic+0x210/0x640
[ 85.502763][ T0] ? vprintk_func+0x8d/0x140
[ 85.507997][ T0] kcsan_report.cold+0xc/0xe
[ 85.512615][ T0] kcsan_setup_watchpoint+0x3fe/0x410
[ 85.518170][ T0] __tsan_read8+0x145/0x1f0
[ 85.522685][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 85.528245][ T0] tick_irq_enter+0x139/0x1c0
[ 85.532932][ T0] irq_enter+0x4f/0x60
[ 85.537003][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 85.542548][ T0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 85.548187][ T0] apic_timer_interrupt+0xf/0x20
[ 85.553222][ T0]
[ 85.556180][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 85.561654][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 6c 00 4c 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 5c 00 4c 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 32 36 a4 fc e8 4d 82 b8 fd 0f
[ 85.581757][ T0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 85.590208][ T0] RAX: 0000000000000016 RBX: ffffffff85a2b780 RCX: 0000ffffffffffff
[ 85.598271][ T0] RDX: 0000000000000000 RSI: 0000000000000016 RDI: ffffffff85a56378
[ 85.606245][ T0] RBP: ffffffff85a03e18 R08: 0000ffff85a56378 R09: 00000000aaaaaaab
[ 85.614321][ T0] R10: 0000ffff85a5637f R11: 0000000000000000 R12: 0000000000000000
[ 85.622578][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 85.630687][ T0] ? default_idle+0x50/0x230
[ 85.635465][ T0] arch_cpu_idle+0x1f/0x30
[ 85.639891][ T0] default_idle_call+0x1e/0x40
[ 85.644680][ T0] do_idle+0x1af/0x280
[ 85.648789][ T0] cpu_startup_entry+0x1b/0x20
[ 85.653572][ T0] rest_init+0xec/0xf6
[ 85.657829][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 85.665179][ T0] arch_call_rest_init+0x17/0x37
[ 85.670130][ T0] start_kernel+0x838/0x85e
[ 85.674744][ T0] x86_64_start_reservations+0x29/0x2b
[ 85.680226][ T0] x86_64_start_kernel+0x72/0x76
[ 85.685173][ T0] secondary_startup_64+0xa4/0xb0
[ 85.692079][ T0] Kernel Offset: disabled
[ 85.696671][ T0] Rebooting in 86400 seconds..