[....] 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.
[ 53.720997][ T27] kauditd_printk_skb: 7 callbacks suppressed
[ 53.721015][ T27] audit: type=1800 audit(1580715807.332:29): pid=7779 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
[ 53.750013][ T27] audit: type=1800 audit(1580715807.332:30): pid=7779 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 '10.128.0.45' (ECDSA) to the list of known hosts.
2020/02/03 07:43:36 fuzzer started
2020/02/03 07:43:38 dialing manager at 10.128.0.105:41149
2020/02/03 07:43:38 syscalls: 2904
2020/02/03 07:43:38 code coverage: enabled
2020/02/03 07:43:38 comparison tracing: enabled
2020/02/03 07:43:38 extra coverage: enabled
2020/02/03 07:43:38 setuid sandbox: enabled
2020/02/03 07:43:38 namespace sandbox: enabled
2020/02/03 07:43:38 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/03 07:43:38 fault injection: enabled
2020/02/03 07:43:38 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/03 07:43:38 net packet injection: enabled
2020/02/03 07:43:38 net device setup: enabled
2020/02/03 07:43:38 concurrency sanitizer: enabled
2020/02/03 07:43:38 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 68.533335][ T7952] KCSAN: could not find function: 'decode_data'
[ 70.248961][ T0] ==================================================================
[ 70.257116][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 70.266045][ T0]
[ 70.268368][ T0] write to 0xffffffff8624c7c8 of 8 bytes by interrupt on cpu 0:
[ 70.276007][ T0] tick_do_update_jiffies64+0x100/0x250
[ 70.281549][ T0] tick_sched_do_timer+0xd4/0xe0
[ 70.286486][ T0] tick_sched_timer+0x43/0xe0
[ 70.291167][ T0] __hrtimer_run_queues+0x274/0x5f0
[ 70.296375][ T0] hrtimer_interrupt+0x22a/0x480
[ 70.301322][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 70.306772][ T0] apic_timer_interrupt+0xf/0x20
[ 70.311704][ T0] kcsan_setup_watchpoint+0x1d4/0x460
[ 70.317073][ T0] __tsan_read1+0xc2/0x100
[ 70.321493][ T0] kallsyms_expand_symbol.constprop.0+0x103/0x160
[ 70.327910][ T0] kallsyms_lookup_name+0x7f/0x120
[ 70.333019][ T0] debugfs_write+0x14b/0x2d0
[ 70.337606][ T0] full_proxy_write+0xbd/0x100
[ 70.342370][ T0] __vfs_write+0x67/0xc0
[ 70.346614][ T0] vfs_write+0x18a/0x390
[ 70.350856][ T0] ksys_write+0xd5/0x1b0
[ 70.355099][ T0] __x64_sys_write+0x4c/0x60
[ 70.359685][ T0] do_syscall_64+0xcc/0x3a0
[ 70.364186][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 70.370058][ T0]
[ 70.372383][ T0] read to 0xffffffff8624c7c8 of 8 bytes by task 0 on cpu 1:
[ 70.379667][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 70.385143][ T0] tick_irq_enter+0x139/0x1c0
[ 70.389810][ T0] irq_enter+0x4f/0x60
[ 70.393872][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 70.399317][ T0] apic_timer_interrupt+0xf/0x20
[ 70.404252][ T0] native_safe_halt+0xe/0x10
[ 70.408841][ T0] arch_cpu_idle+0xa/0x10
[ 70.413179][ T0] default_idle_call+0x1e/0x40
[ 70.417954][ T0] do_idle+0x1c2/0x290
[ 70.422018][ T0] cpu_startup_entry+0x1b/0x20
[ 70.426779][ T0] start_secondary+0x168/0x1b0
[ 70.431539][ T0] secondary_startup_64+0xa4/0xb0
[ 70.436546][ T0]
[ 70.438859][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 70.445017][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 70.452894][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.462980][ T0] ==================================================================
[ 70.471049][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 70.477642][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0
[ 70.485539][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 70.495583][ T0] Call Trace:
[ 70.498859][ T0]
[ 70.501706][ T0] dump_stack+0x11d/0x181
[ 70.506039][ T0] panic+0x210/0x640
[ 70.509933][ T0] ? vprintk_func+0x8d/0x140
[ 70.514526][ T0] kcsan_report.cold+0xc/0xd
[ 70.519121][ T0] kcsan_setup_watchpoint+0x3fe/0x460
[ 70.524495][ T0] __tsan_read8+0xc6/0x100
[ 70.528917][ T0] tick_do_update_jiffies64+0x2b/0x250
[ 70.534372][ T0] tick_irq_enter+0x139/0x1c0
[ 70.539040][ T0] irq_enter+0x4f/0x60
[ 70.543105][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 70.548572][ T0] apic_timer_interrupt+0xf/0x20
[ 70.553495][ T0]
[ 70.556428][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 70.561799][ 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
[ 70.581405][ T0] RSP: 0018:ffffc90000cd3e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 70.589921][ T0] RAX: 0000000000000001 RBX: ffff88812b785040 RCX: ffffffff82546c55
[ 70.597891][ T0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 70.605870][ T0] RBP: ffffc90000cd3e90 R08: ffff88812b785040 R09: 0000ffff85a2d168
[ 70.613854][ T0] R10: 0000c90000cd3e80 R11: 0000ffff85a2d16f R12: 0000000000000001
[ 70.621817][ T0] R13: ffff88812b785040 R14: 0000000000000000 R15: 0000000000000000
[ 70.629801][ T0] ? debug_smp_processor_id+0x35/0x137
[ 70.635255][ T0] ? debug_smp_processor_id+0x3e/0x137
[ 70.640727][ T0] ? default_idle+0x26/0x180
[ 70.645321][ T0] arch_cpu_idle+0xa/0x10
[ 70.649653][ T0] default_idle_call+0x1e/0x40
[ 70.654429][ T0] do_idle+0x1c2/0x290
[ 70.658511][ T0] ? complete+0x44/0x50
[ 70.662676][ T0] cpu_startup_entry+0x1b/0x20
[ 70.667436][ T0] start_secondary+0x168/0x1b0
[ 70.672199][ T0] secondary_startup_64+0xa4/0xb0
[ 70.871157][ T0] Kernel Offset: disabled
[ 70.875499][ T0] Rebooting in 86400 seconds..