[info] Using makefile-style concurrent boot in runlevel 2. [ 49.639017][ T27] audit: type=1800 audit(1581362050.219:21): pid=7772 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 49.683889][ T27] audit: type=1800 audit(1581362050.229:22): pid=7772 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 '10.128.0.81' (ECDSA) to the list of known hosts. 2020/02/10 19:14:21 fuzzer started 2020/02/10 19:14:23 dialing manager at 10.128.0.105:43641 2020/02/10 19:14:24 syscalls: 2904 2020/02/10 19:14:24 code coverage: enabled 2020/02/10 19:14:24 comparison tracing: enabled 2020/02/10 19:14:24 extra coverage: enabled 2020/02/10 19:14:24 setuid sandbox: enabled 2020/02/10 19:14:24 namespace sandbox: enabled 2020/02/10 19:14:24 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/10 19:14:24 fault injection: enabled 2020/02/10 19:14:24 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/10 19:14:24 net packet injection: enabled 2020/02/10 19:14:24 net device setup: enabled 2020/02/10 19:14:24 concurrency sanitizer: enabled 2020/02/10 19:14:24 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/02/10 19:14:25 adding functions to KCSAN blacklist: 'xas_clear_mark' 'tomoyo_supervisor' 'ep_poll' 'find_get_pages_range_tag' 'ext4_free_inode' 'taskstats_exit' 'generic_write_end' 'ktime_get_real_seconds' syzkaller login: [ 73.470099][ C1] ================================================================== [ 73.478329][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 73.487398][ C1] [ 73.489711][ C1] write to 0xffffffff8624d7c8 of 8 bytes by task 0 on cpu 0: [ 73.497071][ C1] tick_do_update_jiffies64+0x100/0x250 [ 73.502614][ C1] __tick_nohz_idle_restart_tick+0x31/0x1b0 [ 73.508505][ C1] tick_nohz_idle_exit+0x1af/0x1e0 [ 73.513598][ C1] do_idle+0xb1/0x290 [ 73.517561][ C1] cpu_startup_entry+0x1b/0x20 [ 73.522329][ C1] rest_init+0xec/0xf6 [ 73.526391][ C1] arch_call_rest_init+0x17/0x37 [ 73.531314][ C1] start_kernel+0x838/0x85e [ 73.535951][ C1] x86_64_start_reservations+0x29/0x2b [ 73.541394][ C1] x86_64_start_kernel+0x72/0x76 [ 73.546319][ C1] secondary_startup_64+0xa4/0xb0 [ 73.551329][ C1] [ 73.553657][ C1] read to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 1: [ 73.561319][ C1] tick_do_update_jiffies64+0x2b/0x250 [ 73.566766][ C1] tick_sched_do_timer+0xd4/0xe0 [ 73.571694][ C1] tick_sched_timer+0x43/0xe0 [ 73.576416][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 73.581610][ C1] hrtimer_interrupt+0x22a/0x480 [ 73.586542][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 73.592079][ C1] apic_timer_interrupt+0xf/0x20 [ 73.597012][ C1] _raw_spin_unlock_irqrestore+0x51/0x80 [ 73.602645][ C1] __wake_up_common_lock+0x85/0xb0 [ 73.607752][ C1] __wake_up_sync_key+0x1b/0x20 [ 73.613030][ C1] sock_def_readable+0xa4/0x140 [ 73.617980][ C1] tcp_data_ready+0x7d/0xd0 [ 73.622497][ C1] tcp_rcv_established+0xd0c/0xf50 [ 73.627602][ C1] tcp_v4_do_rcv+0x3b5/0x520 [ 73.632185][ C1] tcp_v4_rcv+0x1b2a/0x1d20 [ 73.636676][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 73.642041][ C1] ip_local_deliver_finish+0x110/0x140 [ 73.647601][ C1] ip_local_deliver+0x133/0x210 [ 73.652443][ C1] ip_sublist_rcv_finish+0xf8/0x140 [ 73.657628][ C1] ip_sublist_rcv+0x418/0x550 [ 73.662302][ C1] ip_list_rcv+0x2f5/0x322 [ 73.666715][ C1] __netif_receive_skb_list_core+0x350/0x5c0 [ 73.672744][ C1] netif_receive_skb_list_internal+0x5d8/0x830 [ 73.678890][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 73.684076][ C1] gro_normal_one+0x162/0x170 [ 73.688753][ C1] napi_gro_receive+0x288/0x300 [ 73.693594][ C1] receive_buf+0x284/0x30b0 [ 73.698092][ C1] virtnet_poll+0x436/0x7d0 [ 73.702681][ C1] net_rx_action+0x3ae/0xa90 [ 73.707270][ C1] __do_softirq+0x115/0x33f [ 73.711768][ C1] run_ksoftirqd+0x46/0x60 [ 73.716176][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 73.721097][ C1] kthread+0x1d4/0x200 [ 73.725163][ C1] ret_from_fork+0x1f/0x30 [ 73.729597][ C1] [ 73.731907][ C1] Reported by Kernel Concurrency Sanitizer on: [ 73.738050][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 73.746180][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.756220][ C1] ================================================================== [ 73.764264][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 73.770866][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 73.779009][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.789049][ C1] Call Trace: [ 73.792323][ C1] [ 73.795168][ C1] dump_stack+0x11d/0x181 [ 73.799489][ C1] panic+0x210/0x640 [ 73.803379][ C1] ? vprintk_func+0x8d/0x140 [ 73.807976][ C1] kcsan_report.cold+0xc/0x15 [ 73.812653][ C1] kcsan_setup_watchpoint+0x2e2/0x380 [ 73.818069][ C1] __tsan_read8+0xc6/0x100 [ 73.822487][ C1] tick_do_update_jiffies64+0x2b/0x250 [ 73.827945][ C1] tick_sched_do_timer+0xd4/0xe0 [ 73.832870][ C1] tick_sched_timer+0x43/0xe0 [ 73.837691][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 73.842890][ C1] ? tick_sched_handle+0x100/0x100 [ 73.847998][ C1] hrtimer_interrupt+0x22a/0x480 [ 73.853294][ C1] ? sched_clock+0x13/0x20 [ 73.857725][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 73.863176][ C1] apic_timer_interrupt+0xf/0x20 [ 73.868175][ C1] [ 73.871115][ C1] RIP: 0010:_raw_spin_unlock_irqrestore+0x51/0x80 [ 73.877521][ C1] Code: 1c 01 00 74 49 48 89 df e8 20 32 8c fc 66 90 48 c7 c7 18 64 c5 85 e8 fe a0 a9 fc 48 83 3d ce 4b 1c 01 00 74 2b 4c 89 e7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 20 b8 89 fc 65 8b 05 a1 73 58 7b [ 73.897423][ C1] RSP: 0018:ffffc90000cf3420 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 73.905908][ C1] RAX: 000000000000002c RBX: ffff8881251a1980 RCX: ffffffff86253588 [ 73.913865][ C1] RDX: 0000000000000000 RSI: 0000000000000282 RDI: 0000000000000282 [ 73.921828][ C1] RBP: ffffc90000cf3430 R08: 0000000000000000 R09: 0000ffff85c56418 [ 73.929890][ C1] R10: 00008881268fa158 R11: 0000ffff85c5641f R12: 0000000000000282 [ 73.937854][ C1] R13: 0000000000000282 R14: 0000000000000001 R15: 0000000000000001 [ 73.945993][ C1] __wake_up_common_lock+0x85/0xb0 [ 73.951104][ C1] __wake_up_sync_key+0x1b/0x20 [ 73.957519][ C1] sock_def_readable+0xa4/0x140 [ 73.962495][ C1] tcp_data_ready+0x7d/0xd0 [ 73.967000][ C1] tcp_rcv_established+0xd0c/0xf50 [ 73.972197][ C1] ? ipv4_dst_check+0xc6/0xf0 [ 73.976869][ C1] tcp_v4_do_rcv+0x3b5/0x520 [ 73.981453][ C1] tcp_v4_rcv+0x1b2a/0x1d20 [ 73.985941][ C1] ? __read_once_size+0x41/0xe0 [ 73.990794][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 73.996172][ C1] ip_local_deliver_finish+0x110/0x140 [ 74.001621][ C1] ip_local_deliver+0x133/0x210 [ 74.006460][ C1] ? ip_protocol_deliver_rcu+0x420/0x420 [ 74.012089][ C1] ip_sublist_rcv_finish+0xf8/0x140 [ 74.017284][ C1] ip_sublist_rcv+0x418/0x550 [ 74.022089][ C1] ? ip_sublist_rcv+0x550/0x550 [ 74.026935][ C1] ip_list_rcv+0x2f5/0x322 [ 74.031340][ C1] ? ip_rcv+0x1a0/0x1a0 [ 74.035495][ C1] __netif_receive_skb_list_core+0x350/0x5c0 [ 74.041653][ C1] ? __read_once_size+0x5a/0xe0 [ 74.046608][ C1] netif_receive_skb_list_internal+0x5d8/0x830 [ 74.052757][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 74.057952][ C1] ? __write_once_size+0x91/0x110 [ 74.063013][ C1] gro_normal_one+0x162/0x170 [ 74.067679][ C1] napi_gro_receive+0x288/0x300 [ 74.072526][ C1] receive_buf+0x284/0x30b0 [ 74.077066][ C1] ? virtqueue_get_buf_ctx+0x4b4/0x5c0 [ 74.082603][ C1] ? __sanitizer_cov_trace_pc+0xd/0x50 [ 74.088061][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 74.093517][ C1] ? virtqueue_get_buf+0x31/0x40 [ 74.098447][ C1] virtnet_poll+0x436/0x7d0 [ 74.102950][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 74.109191][ C1] net_rx_action+0x3ae/0xa90 [ 74.113776][ C1] __do_softirq+0x115/0x33f [ 74.118374][ C1] ? takeover_tasklets+0x250/0x250 [ 74.123474][ C1] run_ksoftirqd+0x46/0x60 [ 74.128408][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 74.133418][ C1] kthread+0x1d4/0x200 [ 74.137496][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 74.143642][ C1] ? kthread_unpark+0xe0/0xe0 [ 74.148446][ C1] ret_from_fork+0x1f/0x30 [ 74.154430][ C1] Kernel Offset: disabled [ 74.158831][ C1] Rebooting in 86400 seconds..