[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 35.398745][ T25] audit: type=1800 audit(1570204363.390:25): pid=7113 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 35.445612][ T25] audit: type=1800 audit(1570204363.390:26): pid=7113 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 35.467357][ T25] audit: type=1800 audit(1570204363.390:27): pid=7113 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 '10.128.0.94' (ECDSA) to the list of known hosts.
2019/10/04 15:52:53 fuzzer started
2019/10/04 15:52:55 dialing manager at 10.128.0.105:44881
2019/10/04 15:52:55 syscalls: 2523
2019/10/04 15:52:55 code coverage: enabled
2019/10/04 15:52:55 comparison tracing: enabled
2019/10/04 15:52:55 extra coverage: extra coverage is not supported by the kernel
2019/10/04 15:52:55 setuid sandbox: enabled
2019/10/04 15:52:55 namespace sandbox: enabled
2019/10/04 15:52:55 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/04 15:52:55 fault injection: enabled
2019/10/04 15:52:55 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/04 15:52:55 net packet injection: enabled
2019/10/04 15:52:55 net device setup: enabled
2019/10/04 15:52:55 concurrency sanitizer: enabled
syzkaller login: [ 47.703639][ C1] ==================================================================
[ 47.711875][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 47.721009][ C1]
[ 47.723318][ C1] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
[ 47.730966][ C1] tick_do_update_jiffies64+0x105/0x260
[ 47.736494][ C1] tick_sched_do_timer+0xd4/0xe0
[ 47.741672][ C1] tick_sched_timer+0x43/0xe0
[ 47.746333][ C1] __hrtimer_run_queues+0x288/0x600
[ 47.751611][ C1] hrtimer_interrupt+0x22a/0x480
[ 47.756541][ C1] smp_apic_timer_interrupt+0xdc/0x280
[ 47.761986][ C1] apic_timer_interrupt+0xf/0x20
[ 47.766929][ C1] __kcsan_check_watchpoint+0xbb/0x180
[ 47.772563][ C1] __tsan_read8+0x15/0x30
[ 47.776960][ C1] ip_local_deliver_finish+0xb5/0x140
[ 47.782417][ C1] ip_local_deliver+0x133/0x210
[ 47.787266][ C1] ip_rcv_finish+0x121/0x160
[ 47.792106][ C1] ip_rcv+0x18f/0x1a0
[ 47.796093][ C1] __netif_receive_skb_one_core+0xa7/0xe0
[ 47.801784][ C1]
[ 47.804112][ C1] read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1:
[ 47.811859][ C1] tick_do_update_jiffies64+0x2b/0x260
[ 47.817577][ C1] tick_sched_do_timer+0xd4/0xe0
[ 47.822506][ C1] tick_sched_timer+0x43/0xe0
[ 47.827165][ C1] __hrtimer_run_queues+0x288/0x600
[ 47.832354][ C1] hrtimer_interrupt+0x22a/0x480
[ 47.837506][ C1] smp_apic_timer_interrupt+0xdc/0x280
[ 47.843046][ C1] apic_timer_interrupt+0xf/0x20
[ 47.848076][ C1] __kcsan_check_watchpoint+0x101/0x180
[ 47.854066][ C1] __nf_conntrack_find_get+0x1f6/0x870
[ 47.859589][ C1] nf_conntrack_in+0x2ef/0xaa0
[ 47.864467][ C1] ipv4_conntrack_local+0xbe/0x130
[ 47.870019][ C1] nf_hook_slow+0x83/0x160
[ 47.874589][ C1] __ip_local_out+0x1f7/0x2b0
[ 47.879948][ C1]
[ 47.882274][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 47.888419][ C1] CPU: 1 PID: 7264 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[ 47.895510][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.905544][ C1] ==================================================================
[ 47.914473][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 47.921074][ C1] CPU: 1 PID: 7264 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[ 47.928889][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.942258][ C1] Call Trace:
[ 47.945529][ C1]
[ 47.948389][ C1] dump_stack+0xf5/0x159
[ 47.952708][ C1] panic+0x209/0x639
[ 47.956596][ C1] ? vprintk_func+0x8d/0x140
[ 47.961180][ C1] kcsan_report.cold+0x57/0xeb
[ 47.965945][ C1] __kcsan_setup_watchpoint+0x342/0x500
[ 47.972062][ C1] __tsan_read8+0x2c/0x30
[ 47.976391][ C1] tick_do_update_jiffies64+0x2b/0x260
[ 47.981836][ C1] tick_sched_do_timer+0xd4/0xe0
[ 47.987017][ C1] tick_sched_timer+0x43/0xe0
[ 47.991783][ C1] __hrtimer_run_queues+0x288/0x600
[ 47.996975][ C1] ? tick_sched_do_timer+0xe0/0xe0
[ 48.002166][ C1] hrtimer_interrupt+0x22a/0x480
[ 48.007089][ C1] smp_apic_timer_interrupt+0xdc/0x280
[ 48.012529][ C1] apic_timer_interrupt+0xf/0x20
[ 48.017624][ C1]
[ 48.020556][ C1] RIP: 0010:__kcsan_check_watchpoint+0x101/0x180
[ 48.027143][ C1] Code: 78 05 45 84 c0 74 0f 4d 39 cf 77 0a 49 8d 5c 1f ff 48 39 df 76 2f 83 fa 03 75 8a b8 01 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d 65 8b 0d 47 96 af 7e 85 c9 0f 84 40 ff ff ff 5b 41 5c 41 5d 41
[ 48.047123][ C1] RSP: 0018:ffffc900017cf5f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 48.055665][ C1] RAX: 0000000000000001 RBX: ffffc900017cf748 RCX: 0000ffffffffffff
[ 48.064164][ C1] RDX: 0000000000000003 RSI: 0000000000000019 RDI: 0000888124219030
[ 48.072266][ C1] RBP: ffffc900017cf608 R08: 0000000000000000 R09: 0000888124219033
[ 48.080218][ C1] R10: 00000000aaaaaaab R11: ffffffff86042ce0 R12: ffff888124219030
[ 48.088180][ C1] R13: ffff888124219000 R14: 00000000000204bb R15: 0000000000000000
[ 48.096243][ C1] ? __tsan_read4+0x15/0x30
[ 48.100845][ C1] __nf_conntrack_find_get+0x1f6/0x870
[ 48.106579][ C1] ? __tsan_write2+0x32/0x40
[ 48.111359][ C1] ? nf_ct_get_tuple+0x325/0x490
[ 48.116567][ C1] nf_conntrack_in+0x2ef/0xaa0
[ 48.121590][ C1] ipv4_conntrack_local+0xbe/0x130
[ 48.126811][ C1] nf_hook_slow+0x83/0x160
[ 48.131547][ C1] ? nf_ct_tcp_fixup+0xe0/0xe0
[ 48.136499][ C1] __ip_local_out+0x1f7/0x2b0
[ 48.141179][ C1] ? constant_test_bit+0x30/0x30
[ 48.146303][ C1] ip_local_out+0x31/0x90
[ 48.150740][ C1] __ip_queue_xmit+0x3a8/0xa40
[ 48.155530][ C1] ip_queue_xmit+0x45/0x60
[ 48.159933][ C1] __tcp_transmit_skb+0xdeb/0x1cd0
[ 48.165047][ C1] __tcp_send_ack+0x246/0x300
[ 48.169723][ C1] tcp_send_ack+0x34/0x40
[ 48.174041][ C1] tcp_cleanup_rbuf+0x130/0x360
[ 48.178903][ C1] tcp_recvmsg+0x633/0x1a30
[ 48.183422][ C1] inet_recvmsg+0xbb/0x250
[ 48.187953][ C1] ? __tsan_read8+0x2c/0x30
[ 48.192594][ C1] ? inet_sendpage+0x100/0x100
[ 48.197507][ C1] sock_recvmsg+0x92/0xb0
[ 48.201821][ C1] sock_read_iter+0x15f/0x1e0
[ 48.206688][ C1] new_sync_read+0x389/0x4f0
[ 48.211375][ C1] __vfs_read+0xb1/0xc0
[ 48.215946][ C1] vfs_read+0x143/0x2c0
[ 48.220143][ C1] ksys_read+0xd5/0x1b0
[ 48.224498][ C1] __x64_sys_read+0x4c/0x60
[ 48.229386][ C1] do_syscall_64+0xcf/0x2f0
[ 48.233979][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 48.240226][ C1] RIP: 0033:0x47c530
[ 48.244379][ C1] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[ 48.264344][ C1] RSP: 002b:000000c4203d97d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
[ 48.272944][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[ 48.281126][ C1] RDX: 0000000000001000 RSI: 000000c4202b4000 RDI: 0000000000000003
[ 48.289460][ C1] RBP: 000000c4203d9830 R08: 0000000000000000 R09: 0000000000000000
[ 48.297553][ C1] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000100
[ 48.306049][ C1] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff
[ 48.316214][ C1] Kernel Offset: disabled
[ 48.320837][ C1] Rebooting in 86400 seconds..