[ 37.189696][ T25] audit: type=1800 audit(1571003018.009:21): pid=7265 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 37.240589][ T25] audit: type=1800 audit(1571003018.009:22): pid=7265 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [ 37.262185][ T25] audit: type=1800 audit(1571003018.019:23): pid=7265 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. 2019/10/13 21:43:48 fuzzer started 2019/10/13 21:43:50 dialing manager at 10.128.0.105:40973 2019/10/13 21:43:50 syscalls: 2523 2019/10/13 21:43:50 code coverage: enabled 2019/10/13 21:43:50 comparison tracing: enabled 2019/10/13 21:43:50 extra coverage: extra coverage is not supported by the kernel 2019/10/13 21:43:50 setuid sandbox: enabled 2019/10/13 21:43:50 namespace sandbox: enabled 2019/10/13 21:43:50 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/13 21:43:50 fault injection: enabled 2019/10/13 21:43:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/13 21:43:50 net packet injection: enabled 2019/10/13 21:43:50 net device setup: enabled 2019/10/13 21:43:50 concurrency sanitizer: enabled syzkaller login: [ 50.144140][ C1] ================================================================== [ 50.152916][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 50.161834][ C1] [ 50.164146][ C1] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0: [ 50.171775][ C1] tick_do_update_jiffies64+0x105/0x260 [ 50.177330][ C1] tick_sched_do_timer+0xd4/0xe0 [ 50.182270][ C1] tick_sched_timer+0x43/0xe0 [ 50.187099][ C1] __hrtimer_run_queues+0x288/0x600 [ 50.192463][ C1] hrtimer_interrupt+0x22a/0x480 [ 50.197397][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 50.202852][ C1] apic_timer_interrupt+0xf/0x20 [ 50.207929][ C1] __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 50.213898][ C1] iptable_filter_hook+0x4a/0x60 [ 50.219089][ C1] nf_hook_slow+0x83/0x160 [ 50.223498][ C1] __ip_local_out+0x1f7/0x2b0 [ 50.228352][ C1] ip_local_out+0x31/0x90 [ 50.233085][ C1] __ip_queue_xmit+0x3a8/0xa40 [ 50.238195][ C1] ip_queue_xmit+0x45/0x60 [ 50.242991][ C1] [ 50.245304][ C1] read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: [ 50.253067][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 50.258682][ C1] tick_sched_do_timer+0xd4/0xe0 [ 50.263738][ C1] tick_sched_timer+0x43/0xe0 [ 50.268524][ C1] __hrtimer_run_queues+0x288/0x600 [ 50.273836][ C1] hrtimer_interrupt+0x22a/0x480 [ 50.278761][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 50.284516][ C1] apic_timer_interrupt+0xf/0x20 [ 50.290379][ C1] __kcsan_check_watchpoint+0x95/0x180 [ 50.295836][ C1] __tsan_read1+0x15/0x30 [ 50.300178][ C1] tcp_v4_rcv+0x15d4/0x1bf0 [ 50.304773][ C1] ip_protocol_deliver_rcu+0x51/0x470 [ 50.310145][ C1] ip_local_deliver_finish+0x110/0x140 [ 50.315805][ C1] ip_local_deliver+0x133/0x210 [ 50.320641][ C1] [ 50.323091][ C1] Reported by Kernel Concurrency Sanitizer on: [ 50.329484][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0 [ 50.337182][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.347617][ C1] ================================================================== [ 50.356009][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 50.362854][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0 [ 50.369951][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.380260][ C1] Call Trace: [ 50.383542][ C1] [ 50.386383][ C1] dump_stack+0xf5/0x159 [ 50.391328][ C1] panic+0x209/0x639 [ 50.395230][ C1] ? __tsan_read1+0x15/0x30 [ 50.399864][ C1] ? vprintk_func+0x8d/0x140 [ 50.404442][ C1] kcsan_report.cold+0xc/0x1b [ 50.409667][ C1] __kcsan_setup_watchpoint+0x3ee/0x510 [ 50.415330][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 50.421125][ C1] __tsan_read8+0x2c/0x30 [ 50.426111][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 50.431957][ C1] tick_sched_do_timer+0xd4/0xe0 [ 50.436884][ C1] tick_sched_timer+0x43/0xe0 [ 50.441581][ C1] __hrtimer_run_queues+0x288/0x600 [ 50.447027][ C1] ? tick_sched_do_timer+0xe0/0xe0 [ 50.452320][ C1] hrtimer_interrupt+0x22a/0x480 [ 50.457386][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 50.463211][ C1] apic_timer_interrupt+0xf/0x20 [ 50.468253][ C1] [ 50.471435][ C1] RIP: 0010:__kcsan_check_watchpoint+0x95/0x180 [ 50.477926][ C1] Code: 48 21 cf 83 e6 3f 41 ba ab aa aa aa 4e 8d 4c 37 ff 8d 42 01 48 89 c2 49 0f af c2 89 d3 48 c1 e8 21 8d 04 40 29 c3 8d 44 1e ff <41> 89 c3 41 c1 fb 1f 41 c1 eb 1a 44 01 d8 83 e0 3f 44 29 d8 48 98 [ 50.498245][ C1] RSP: 0018:ffffc90000cf37b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 50.507023][ C1] RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000ffffffffffff [ 50.515029][ C1] RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000888126a44c1d [ 50.523326][ C1] RBP: ffffc90000cf37e0 R08: 0000000000000000 R09: 0000888126a44c1d [ 50.531636][ C1] R10: 00000000aaaaaaab R11: ffffffff86042c48 R12: 0000000000000000 [ 50.539871][ C1] R13: ffff888126a44c1d R14: 0000000000000001 R15: ffff888125e7cf00 [ 50.548327][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 50.553973][ C1] __tsan_read1+0x15/0x30 [ 50.558866][ C1] tcp_v4_rcv+0x15d4/0x1bf0 [ 50.563375][ C1] ? __tsan_read8+0x2c/0x30 [ 50.568594][ C1] ip_protocol_deliver_rcu+0x51/0x470 [ 50.574146][ C1] ip_local_deliver_finish+0x110/0x140 [ 50.579971][ C1] ip_local_deliver+0x133/0x210 [ 50.586675][ C1] ? ip_protocol_deliver_rcu+0x470/0x470 [ 50.593809][ C1] ip_rcv_finish+0x121/0x160 [ 50.598648][ C1] ip_rcv+0x18f/0x1a0 [ 50.602638][ C1] ? ip_sublist_rcv+0x5e0/0x5e0 [ 50.607890][ C1] ? ip_local_deliver+0x210/0x210 [ 50.612909][ C1] __netif_receive_skb_one_core+0xa7/0xe0 [ 50.618738][ C1] __netif_receive_skb+0x37/0xf0 [ 50.623956][ C1] netif_receive_skb_internal+0x59/0x190 [ 50.630174][ C1] napi_gro_receive+0x28f/0x330 [ 50.636163][ C1] receive_buf+0x284/0x30b0 [ 50.640929][ C1] ? __tsan_write8+0x32/0x40 [ 50.647812][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 50.655076][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 50.660834][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 50.667352][ C1] virtnet_poll+0x436/0x7d0 [ 50.672057][ C1] net_rx_action+0x3ae/0xa50 [ 50.677141][ C1] __do_softirq+0x115/0x33f [ 50.682049][ C1] ? takeover_tasklets+0x250/0x250 [ 50.687175][ C1] run_ksoftirqd+0x46/0x60 [ 50.691861][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 50.697153][ C1] kthread+0x1d4/0x200 [ 50.701494][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 50.709237][ C1] ? kthread_bind+0x50/0x50 [ 50.713838][ C1] ret_from_fork+0x1f/0x30 [ 50.720180][ C1] Kernel Offset: disabled [ 50.724680][ C1] Rebooting in 86400 seconds..