[info] Using makefile-style concurrent boot in runlevel 2. [ 47.347879][ T27] audit: type=1800 audit(1581598696.711:21): pid=7812 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 47.375414][ T27] audit: type=1800 audit(1581598696.711:22): pid=7812 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 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 '10.128.0.166' (ECDSA) to the list of known hosts. 2020/02/13 12:58:25 fuzzer started 2020/02/13 12:58:27 dialing manager at 10.128.0.105:34321 2020/02/13 12:58:30 syscalls: 2905 2020/02/13 12:58:30 code coverage: enabled 2020/02/13 12:58:30 comparison tracing: enabled 2020/02/13 12:58:30 extra coverage: enabled 2020/02/13 12:58:30 setuid sandbox: enabled 2020/02/13 12:58:30 namespace sandbox: enabled 2020/02/13 12:58:30 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/13 12:58:30 fault injection: enabled 2020/02/13 12:58:30 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/13 12:58:30 net packet injection: enabled 2020/02/13 12:58:30 net device setup: enabled 2020/02/13 12:58:30 concurrency sanitizer: enabled 2020/02/13 12:58:30 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/02/13 12:58:31 adding functions to KCSAN blacklist: 'ep_poll' 'generic_write_end' 'blk_mq_dispatch_rq_list' 'ext4_free_inodes_count' 'ext4_free_inode' 'n_tty_receive_buf_common' '__rb_insert_augmented' 'taskstats_exit' 'ktime_get_real_seconds' 'vm_area_dup' 'audit_log_start' 'find_get_pages_range_tag' 'tomoyo_supervisor' 'run_timer_softirq' syzkaller login: [ 77.035435][ C0] ================================================================== [ 77.043862][ C0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 77.052822][ C0] [ 77.055164][ C0] write to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 1: [ 77.062812][ C0] tick_do_update_jiffies64+0x100/0x250 [ 77.068367][ C0] tick_sched_do_timer+0xd4/0xe0 [ 77.073473][ C0] tick_sched_timer+0x43/0xe0 [ 77.078169][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 77.083478][ C0] hrtimer_interrupt+0x22a/0x480 [ 77.088412][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 77.093861][ C0] apic_timer_interrupt+0xf/0x20 [ 77.098885][ C0] __sanitizer_cov_trace_pc+0xd/0x50 [ 77.104379][ C0] __read_once_size+0x34/0xe0 [ 77.109046][ C0] ipt_do_table+0x200/0xe60 [ 77.113551][ C0] iptable_security_hook+0x4a/0x60 [ 77.118765][ C0] nf_hook_slow+0x83/0x160 [ 77.123179][ C0] ip_local_deliver+0x1e5/0x210 [ 77.128059][ C0] ip_sublist_rcv_finish+0xf8/0x140 [ 77.133263][ C0] ip_sublist_rcv+0x418/0x550 [ 77.138001][ C0] ip_list_rcv+0x2f5/0x322 [ 77.142615][ C0] __netif_receive_skb_list_core+0x350/0x5c0 [ 77.148606][ C0] netif_receive_skb_list_internal+0x5d8/0x830 [ 77.154757][ C0] gro_normal_list.part.0+0x3a/0xb0 [ 77.160014][ C0] gro_normal_one+0x162/0x170 [ 77.164806][ C0] napi_gro_receive+0x288/0x300 [ 77.169643][ C0] receive_buf+0x284/0x30b0 [ 77.174198][ C0] virtnet_poll+0x436/0x7d0 [ 77.178700][ C0] net_rx_action+0x3ae/0xa90 [ 77.183333][ C0] __do_softirq+0x115/0x33f [ 77.187828][ C0] run_ksoftirqd+0x46/0x60 [ 77.192443][ C0] smpboot_thread_fn+0x37d/0x4a0 [ 77.197561][ C0] kthread+0x1d4/0x200 [ 77.201727][ C0] ret_from_fork+0x1f/0x30 [ 77.206145][ C0] [ 77.208521][ C0] read to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 0: [ 77.216476][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 77.222066][ C0] tick_sched_do_timer+0xd4/0xe0 [ 77.227073][ C0] tick_sched_timer+0x43/0xe0 [ 77.231746][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 77.236943][ C0] hrtimer_interrupt+0x22a/0x480 [ 77.241890][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 77.247346][ C0] apic_timer_interrupt+0xf/0x20 [ 77.252283][ C0] __tsan_read8+0x2b/0x100 [ 77.256695][ C0] packet_rcv_spkt+0x187/0x310 [ 77.261466][ C0] dev_queue_xmit_nit+0x5d3/0x5e0 [ 77.266494][ C0] dev_hard_start_xmit+0x3f5/0x430 [ 77.271666][ C0] sch_direct_xmit+0x2b3/0x900 [ 77.276556][ C0] __dev_queue_xmit+0x13e2/0x1ba0 [ 77.281708][ C0] dev_queue_xmit+0x21/0x30 [ 77.286212][ C0] ip_finish_output2+0x89b/0xea0 [ 77.291270][ C0] __ip_finish_output+0x23a/0x490 [ 77.296398][ C0] ip_finish_output+0x41/0x160 [ 77.301256][ C0] ip_output+0xfe/0x230 [ 77.305502][ C0] ip_local_out+0x74/0x90 [ 77.309836][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 77.314597][ C0] ip_queue_xmit+0x45/0x60 [ 77.319012][ C0] __tcp_transmit_skb+0xea3/0x1df0 [ 77.324114][ C0] __tcp_send_ack+0x246/0x300 [ 77.328786][ C0] tcp_send_ack+0x34/0x40 [ 77.333141][ C0] tcp_cleanup_rbuf+0x130/0x360 [ 77.338097][ C0] tcp_recvmsg+0x687/0x1c90 [ 77.342658][ C0] inet_recvmsg+0xbb/0x250 [ 77.347063][ C0] sock_recvmsg+0x92/0xb0 [ 77.351523][ C0] sock_read_iter+0x15f/0x1e0 [ 77.356328][ C0] new_sync_read+0x4b1/0x4f0 [ 77.361024][ C0] __vfs_read+0xb1/0xc0 [ 77.365179][ C0] vfs_read+0x143/0x2c0 [ 77.369454][ C0] ksys_read+0x17b/0x1b0 [ 77.373937][ C0] __x64_sys_read+0x4c/0x60 [ 77.378463][ C0] do_syscall_64+0xcc/0x3a0 [ 77.382984][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.388855][ C0] [ 77.391167][ C0] Reported by Kernel Concurrency Sanitizer on: [ 77.397465][ C0] CPU: 0 PID: 7982 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0 [ 77.405825][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.415968][ C0] ================================================================== [ 77.424016][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 77.430705][ C0] CPU: 0 PID: 7982 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0 [ 77.439059][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.449191][ C0] Call Trace: [ 77.452769][ C0] [ 77.455855][ C0] dump_stack+0x11d/0x181 [ 77.460180][ C0] panic+0x210/0x640 [ 77.464076][ C0] ? vprintk_func+0x8d/0x140 [ 77.468660][ C0] kcsan_report.cold+0xc/0x15 [ 77.473343][ C0] kcsan_setup_watchpoint+0x2e2/0x380 [ 77.478739][ C0] __tsan_read8+0xc6/0x100 [ 77.483372][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 77.488961][ C0] tick_sched_do_timer+0xd4/0xe0 [ 77.494509][ C0] tick_sched_timer+0x43/0xe0 [ 77.499908][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 77.505129][ C0] ? tick_sched_handle+0x100/0x100 [ 77.510264][ C0] hrtimer_interrupt+0x22a/0x480 [ 77.515373][ C0] ? sched_clock+0x13/0x20 [ 77.520075][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 77.525674][ C0] apic_timer_interrupt+0xf/0x20 [ 77.530942][ C0] [ 77.533988][ C0] RIP: 0010:__tsan_read8+0x2b/0x100 [ 77.539178][ C0] Code: 89 f8 49 89 f9 55 48 ba ff ff ff ff ff ff 00 00 48 c1 e8 09 49 21 d1 48 89 e5 4d 8d 59 07 25 f8 01 00 00 48 8d 88 c0 34 25 86 <48> 05 d8 34 25 86 4c 8b 01 49 83 f8 01 76 27 4d 85 c0 79 22 4c 89 [ 77.558899][ C0] RSP: 0018:ffffc9000166b408 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 77.567926][ C0] RAX: 0000000000000170 RBX: ffff88812676eb68 RCX: ffffffff86253630 [ 77.576069][ C0] RDX: 0000ffffffffffff RSI: ffffffff8427009a RDI: ffff88812676eb68 [ 77.584041][ C0] RBP: ffffc9000166b408 R08: ffff88812298a080 R09: 000088812676eb68 [ 77.592009][ C0] R10: 000088812676eb80 R11: 000088812676eb6f R12: ffff88812676eb00 [ 77.600102][ C0] R13: ffff88812b15d000 R14: ffff888123e39800 R15: ffff88812676eb58 [ 77.608193][ C0] ? packet_rcv_spkt+0x17a/0x310 [ 77.613193][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.619708][ C0] packet_rcv_spkt+0x187/0x310 [ 77.624600][ C0] ? packet_parse_headers.isra.0+0x260/0x260 [ 77.630706][ C0] dev_queue_xmit_nit+0x5d3/0x5e0 [ 77.635734][ C0] dev_hard_start_xmit+0x3f5/0x430 [ 77.640867][ C0] ? validate_xmit_skb_list+0xc9/0xe0 [ 77.646235][ C0] sch_direct_xmit+0x2b3/0x900 [ 77.651309][ C0] __dev_queue_xmit+0x13e2/0x1ba0 [ 77.656334][ C0] ? ipt_do_table+0x8e9/0xe60 [ 77.661166][ C0] ? __this_cpu_preempt_check+0x45/0x140 [ 77.666799][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.673215][ C0] ? __rcu_read_unlock+0x77/0x390 [ 77.679372][ C0] dev_queue_xmit+0x21/0x30 [ 77.684042][ C0] ip_finish_output2+0x89b/0xea0 [ 77.689136][ C0] __ip_finish_output+0x23a/0x490 [ 77.694359][ C0] ? ipv4_confirm+0xdc/0x160 [ 77.699132][ C0] ip_finish_output+0x41/0x160 [ 77.703900][ C0] ip_output+0xfe/0x230 [ 77.708076][ C0] ? __ip_finish_output+0x490/0x490 [ 77.713275][ C0] ip_local_out+0x74/0x90 [ 77.717603][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 77.722428][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 77.728502][ C0] ip_queue_xmit+0x45/0x60 [ 77.733113][ C0] __tcp_transmit_skb+0xea3/0x1df0 [ 77.738328][ C0] __tcp_send_ack+0x246/0x300 [ 77.743032][ C0] tcp_send_ack+0x34/0x40 [ 77.747356][ C0] tcp_cleanup_rbuf+0x130/0x360 [ 77.752203][ C0] tcp_recvmsg+0x687/0x1c90 [ 77.756790][ C0] inet_recvmsg+0xbb/0x250 [ 77.761362][ C0] ? apparmor_socket_recvmsg+0x3b/0x50 [ 77.766936][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.773295][ C0] ? security_socket_recvmsg+0x92/0xb0 [ 77.778977][ C0] ? inet_sendpage+0x100/0x100 [ 77.783784][ C0] sock_recvmsg+0x92/0xb0 [ 77.788233][ C0] sock_read_iter+0x15f/0x1e0 [ 77.792995][ C0] new_sync_read+0x4b1/0x4f0 [ 77.797720][ C0] __vfs_read+0xb1/0xc0 [ 77.801875][ C0] vfs_read+0x143/0x2c0 [ 77.806040][ C0] ksys_read+0x17b/0x1b0 [ 77.810350][ C0] __x64_sys_read+0x4c/0x60 [ 77.815197][ C0] do_syscall_64+0xcc/0x3a0 [ 77.819711][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.825711][ C0] RIP: 0033:0x47c530 [ 77.829603][ C0] 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 [ 77.849463][ C0] RSP: 002b:000000c42015f7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 77.858120][ C0] RAX: ffffffffffffffda RBX: 000000c420327400 RCX: 000000000047c530 [ 77.866215][ C0] RDX: 0000000000001000 RSI: 000000c42040c000 RDI: 0000000000000003 [ 77.874405][ C0] RBP: 000000c42015f830 R08: 0000000000000000 R09: 0000000000000000 [ 77.883269][ C0] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000040 [ 77.891240][ C0] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 77.901154][ C0] Kernel Offset: disabled [ 77.905642][ C0] Rebooting in 86400 seconds..