[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 46.729816][ T26] audit: type=1800 audit(1584227709.307:21): pid=7659 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 46.780432][ T26] audit: type=1800 audit(1584227709.317:22): pid=7659 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[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.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.15.210' (ECDSA) to the list of known hosts.
2020/03/14 23:15:18 fuzzer started
2020/03/14 23:15:19 dialing manager at 10.128.0.105:34157
2020/03/14 23:15:20 syscalls: 2955
2020/03/14 23:15:20 code coverage: enabled
2020/03/14 23:15:20 comparison tracing: enabled
2020/03/14 23:15:20 extra coverage: enabled
2020/03/14 23:15:20 setuid sandbox: enabled
2020/03/14 23:15:20 namespace sandbox: enabled
2020/03/14 23:15:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/14 23:15:20 fault injection: enabled
2020/03/14 23:15:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/14 23:15:20 net packet injection: enabled
2020/03/14 23:15:20 net device setup: enabled
2020/03/14 23:15:20 concurrency sanitizer: enabled
2020/03/14 23:15:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 59.202844][ T7828] KCSAN: could not find function: 'poll_schedule_timeout'
[ 62.299616][ T7828] KCSAN: could not find function: '_find_next_bit'
2020/03/14 23:15:27 adding functions to KCSAN blacklist: 'tick_sched_do_timer' '__ext4_new_inode' 'do_exit' '__mark_inode_dirty' '__snd_rawmidi_transmit_ack' 'dput' 'ep_poll' 'snd_seq_prioq_cell_out' 'pcpu_alloc' '__add_to_page_cache_locked' 'ext4_da_write_end' 'pipe_double_lock' 'poll_schedule_timeout' 'alloc_pid' 'ext4_free_inodes_count' 'ext4_mark_iloc_dirty' 'find_get_pages_range_tag' 'blk_mq_sched_dispatch_requests' 'blk_mq_dispatch_rq_list' 'shmem_file_read_iter' 'ktime_get_real_seconds' 'commit_echoes' 'yama_ptracer_del' 'wbt_done' 'do_readlinkat' 'n_tty_receive_buf_common' 'lookup_fast' 'ext4_writepages' 'find_group_orlov' 'xas_find_marked' 'dd_has_work' 'ondemand_readahead' 'ext4_has_free_clusters' 'blk_mq_get_request' 'generic_file_read_iter' 'audit_log_start' 'wbt_issue' 'ext4_mb_good_group' '_find_next_bit' 'add_timer' 'run_timer_softirq' 'shmem_getpage_gfp' 'lruvec_lru_size' '__filemap_fdatawrite_range' 'get_cpu_iowait_time_us' 'ip6_tnl_start_xmit' '__tpacket_v3_has_room' 'xas_clear_mark' 'generic_fillattr' 'mod_timer' 'kauditd_thread' 'do_syslog' 'tick_nohz_idle_stop_tick' 'do_signal_stop' 'echo_char' 'ext4_nonda_switch' 'generic_write_end' 'copy_process' 'kcm_rfree' 'atime_needs_update' 'do_nanosleep' 'ext4_handle_inode_extension'
[ 161.685165][ C0] ==================================================================
[ 161.693302][ C0] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 161.701683][ C0]
[ 161.704002][ C0] write to 0xffff88812c11dbe4 of 1 bytes by task 0 on cpu 1:
[ 161.711357][ C0] timer_clear_idle+0x3d/0x50
[ 161.716045][ C0] __tick_nohz_idle_restart_tick+0x32/0x1a0
[ 161.721932][ C0] tick_nohz_idle_exit+0x19c/0x1d0
[ 161.727032][ C0] do_idle+0xac/0x290
[ 161.731011][ C0] cpu_startup_entry+0x14/0x20
[ 161.735762][ C0] start_secondary+0x164/0x1b0
[ 161.740518][ C0] secondary_startup_64+0xa4/0xb0
[ 161.745530][ C0]
[ 161.747856][ C0] read to 0xffff88812c11dbe4 of 1 bytes by interrupt on cpu 0:
[ 161.755389][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 161.760926][ C0] mod_timer+0x50e/0x830
[ 161.765156][ C0] sk_reset_timer+0x29/0xc0
[ 161.769641][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 161.774851][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 161.779940][ C0] tcp_rcv_established+0x72b/0xee0
[ 161.785043][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 161.789612][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 161.794102][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 161.799480][ C0] ip_local_deliver_finish+0xf3/0x120
[ 161.804834][ C0] ip_local_deliver+0x135/0x220
[ 161.809680][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 161.814868][ C0] ip_sublist_rcv+0x3f8/0x530
[ 161.819541][ C0] ip_list_rcv+0x2f3/0x321
[ 161.823941][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 161.829913][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 161.836963][ C0] gro_normal_list.part.0+0x37/0xa0
[ 161.843024][ C0] napi_complete_done+0x1d3/0x3a0
[ 161.848046][ C0] virtqueue_napi_complete+0x36/0xa0
[ 161.853317][ C0] virtnet_poll+0x771/0x790
[ 161.857807][ C0] net_rx_action+0x3ad/0xac0
[ 161.862386][ C0] __do_softirq+0x118/0x34a
[ 161.866880][ C0] irq_exit+0xb5/0xd0
[ 161.870846][ C0] do_IRQ+0x7b/0x120
[ 161.874722][ C0] ret_from_intr+0x0/0x21
[ 161.879031][ C0] native_safe_halt+0xe/0x10
[ 161.883609][ C0] default_idle+0x21/0x170
[ 161.888003][ C0] do_idle+0x1b7/0x290
[ 161.892055][ C0] cpu_startup_entry+0x14/0x20
[ 161.897495][ C0] rest_init+0xe4/0xeb
[ 161.901559][ C0] arch_call_rest_init+0x13/0x2b
[ 161.906529][ C0] start_kernel+0xcc2/0xceb
[ 161.911022][ C0] secondary_startup_64+0xa4/0xb0
[ 161.916022][ C0]
[ 161.918323][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 161.924482][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 161.932360][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 161.942407][ C0] ==================================================================
[ 161.950473][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 161.957059][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 161.964967][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 161.975616][ C0] Call Trace:
[ 161.978892][ C0]
[ 161.981753][ C0] dump_stack+0x11d/0x187
[ 161.986071][ C0] panic+0x210/0x640
[ 161.989959][ C0] ? vprintk_func+0x89/0x13a
[ 161.994536][ C0] kcsan_report.cold+0xc/0x14
[ 161.999195][ C0] kcsan_setup_watchpoint+0x3e3/0x420
[ 162.004572][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 162.010108][ C0] mod_timer+0x50e/0x830
[ 162.014337][ C0] sk_reset_timer+0x29/0xc0
[ 162.018822][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 162.024031][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 162.029136][ C0] ? constant_test_bit+0xd/0x30
[ 162.034948][ C0] tcp_rcv_established+0x72b/0xee0
[ 162.040072][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 162.044654][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 162.049162][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 162.054556][ C0] ip_local_deliver_finish+0xf3/0x120
[ 162.059915][ C0] ip_local_deliver+0x135/0x220
[ 162.064763][ C0] ? ip_protocol_deliver_rcu+0x410/0x410
[ 162.070389][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 162.075581][ C0] ip_sublist_rcv+0x3f8/0x530
[ 162.080241][ C0] ? ip_sublist_rcv+0x530/0x530
[ 162.085088][ C0] ip_list_rcv+0x2f3/0x321
[ 162.089486][ C0] ? ip_rcv+0x1b0/0x1b0
[ 162.093667][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 162.099630][ C0] ? ktime_get_with_offset+0x1e6/0x230
[ 162.105090][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 162.111261][ C0] ? receive_buf+0x25d/0x2e20
[ 162.115936][ C0] gro_normal_list.part.0+0x37/0xa0
[ 162.121299][ C0] napi_complete_done+0x1d3/0x3a0
[ 162.126307][ C0] ? virtqueue_enable_cb_prepare+0x19b/0x2a0
[ 162.132274][ C0] virtqueue_napi_complete+0x36/0xa0
[ 162.137551][ C0] virtnet_poll+0x771/0x790
[ 162.142571][ C0] net_rx_action+0x3ad/0xac0
[ 162.147192][ C0] __do_softirq+0x118/0x34a
[ 162.153420][ C0] irq_exit+0xb5/0xd0
[ 162.158527][ C0] do_IRQ+0x7b/0x120
[ 162.162411][ C0] common_interrupt+0xf/0xf
[ 162.166893][ C0]
[ 162.169849][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 162.175345][ C0] Code: ff cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d fc 08 44 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d ec 08 44 00 fb f4 cc 41 54 55 53 e8 37 ff 9a fc e8 92 b0 b3 fd 0f 1f 44 00 00 48
[ 162.194940][ C0] RSP: 0018:ffffffff85a03e50 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda
[ 162.203334][ C0] RAX: 0000000000000000 RBX: ffffffff85a2b840 RCX: ffffffff825221d1
[ 162.211288][ C0] RDX: 0000000000000000 RSI: ffffffff825221da RDI: 0000000000000005
[ 162.219253][ C0] RBP: 0000000000000000 R08: ffffffff85a2b840 R09: 0000ffff8584b160
[ 162.227582][ C0] R10: 0000ffff85a03e38 R11: 0000ffff8584b167 R12: ffffffff85a2b840
[ 162.235618][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff85a2b840
[ 162.243609][ C0] ? debug_smp_processor_id+0x31/0x129
[ 162.249053][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 162.254495][ C0] default_idle+0x21/0x170
[ 162.258892][ C0] do_idle+0x1b7/0x290
[ 162.262953][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 162.268428][ C0] cpu_startup_entry+0x14/0x20
[ 162.273186][ C0] rest_init+0xe4/0xeb
[ 162.277244][ C0] arch_call_rest_init+0x13/0x2b
[ 162.282169][ C0] start_kernel+0xcc2/0xceb
[ 162.286671][ C0] secondary_startup_64+0xa4/0xb0
[ 162.293211][ C0] Kernel Offset: disabled
[ 162.297550][ C0] Rebooting in 86400 seconds..