[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 45.147572][ T27] audit: type=1800 audit(1583599219.952:21): pid=7473 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 45.192373][ T27] audit: type=1800 audit(1583599219.952:22): pid=7473 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 '10.128.0.118' (ECDSA) to the list of known hosts.
2020/03/07 16:40:29 fuzzer started
2020/03/07 16:40:30 dialing manager at 10.128.0.105:33861
2020/03/07 16:40:30 syscalls: 2955
2020/03/07 16:40:30 code coverage: enabled
2020/03/07 16:40:30 comparison tracing: enabled
2020/03/07 16:40:30 extra coverage: enabled
2020/03/07 16:40:30 setuid sandbox: enabled
2020/03/07 16:40:30 namespace sandbox: enabled
2020/03/07 16:40:30 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/07 16:40:30 fault injection: enabled
2020/03/07 16:40:30 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/07 16:40:30 net packet injection: enabled
2020/03/07 16:40:30 net device setup: enabled
2020/03/07 16:40:30 concurrency sanitizer: enabled
2020/03/07 16:40:30 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 56.528993][ T7642] KCSAN: could not find function: 'poll_schedule_timeout'
[ 57.713658][ T7642] KCSAN: could not find function: '_find_next_bit'
2020/03/07 16:40:35 adding functions to KCSAN blacklist: 'do_nanosleep' 'wbt_done' 'poll_schedule_timeout' 'copy_process' 'blk_mq_sched_dispatch_requests' '__snd_rawmidi_transmit_ack' 'atime_needs_update' 'blk_mq_dispatch_rq_list' 'run_timer_softirq' '_find_next_bit' 'mod_timer' 'page_counter_try_charge' 'clear_inode' 'xas_find_marked' 'ep_poll' 'ktime_get_real_seconds' 'tick_sched_do_timer' 'generic_fillattr' 'watchdog' 'tick_nohz_idle_stop_tick' 'pipe_double_lock' 'kauditd_thread' 'pcpu_alloc' 'xas_clear_mark' 'audit_log_start' '__ext4_new_inode' '__writeback_single_inode' 'ext4_has_free_clusters' 'add_timer' 'find_get_pages_range_tag' 'ext4_nonda_switch' 'snd_seq_prioq_cell_out' 'ip6_tnl_start_xmit' 'do_syslog' 'shmem_add_to_page_cache' 'generic_write_end' 'wbt_issue' '__lru_cache_add' 'blk_mq_get_request' 'ext4_free_inodes_count' 'commit_echoes'
[ 155.854331][ C0] ==================================================================
[ 155.862471][ C0] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 155.870853][ C0]
[ 155.873169][ C0] write to 0xffff88812c11dbe4 of 1 bytes by task 0 on cpu 1:
[ 155.880690][ C0] timer_clear_idle+0x3d/0x50
[ 155.885362][ C0] __tick_nohz_idle_restart_tick+0x32/0x1a0
[ 155.891253][ C0] tick_nohz_idle_exit+0x19c/0x1d0
[ 155.896352][ C0] do_idle+0xac/0x290
[ 155.900315][ C0] cpu_startup_entry+0x14/0x20
[ 155.905078][ C0] start_secondary+0x164/0x1b0
[ 155.909944][ C0] secondary_startup_64+0xa4/0xb0
[ 155.914956][ C0]
[ 155.917274][ C0] read to 0xffff88812c11dbe4 of 1 bytes by interrupt on cpu 0:
[ 155.924805][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 155.930336][ C0] mod_timer+0x50e/0x830
[ 155.934564][ C0] sk_reset_timer+0x29/0xc0
[ 155.939208][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 155.944390][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 155.949524][ C0] tcp_rcv_established+0x72b/0xee0
[ 155.954742][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 155.959327][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 155.963938][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 155.969292][ C0] ip_local_deliver_finish+0xf3/0x120
[ 155.974659][ C0] ip_local_deliver+0x135/0x220
[ 155.979516][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 155.984707][ C0] ip_sublist_rcv+0x3f8/0x530
[ 155.989378][ C0] ip_list_rcv+0x2f3/0x321
[ 155.993778][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 155.999737][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 156.005869][ C0] gro_normal_list.part.0+0x37/0xa0
[ 156.011042][ C0] gro_normal_one+0x14c/0x160
[ 156.015760][ C0] napi_gro_receive+0x27d/0x2f0
[ 156.020628][ C0] receive_buf+0x24e/0x2e20
[ 156.025254][ C0] virtnet_poll+0x343/0x790
[ 156.029744][ C0] net_rx_action+0x3ad/0xac0
[ 156.034447][ C0] __do_softirq+0x118/0x34a
[ 156.038949][ C0] irq_exit+0xb5/0xd0
[ 156.042984][ C0] do_IRQ+0x7b/0x120
[ 156.046872][ C0] ret_from_intr+0x0/0x21
[ 156.051182][ C0] native_safe_halt+0xe/0x10
[ 156.055753][ C0] default_idle+0x21/0x170
[ 156.060157][ C0] do_idle+0x1b7/0x290
[ 156.064208][ C0] cpu_startup_entry+0x14/0x20
[ 156.069039][ C0] rest_init+0xe4/0xeb
[ 156.073106][ C0] arch_call_rest_init+0x13/0x2b
[ 156.078022][ C0] start_kernel+0xcc2/0xceb
[ 156.082508][ C0] secondary_startup_64+0xa4/0xb0
[ 156.087501][ C0]
[ 156.089805][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 156.096048][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 156.103946][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 156.113981][ C0] ==================================================================
[ 156.122021][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 156.128593][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 156.136544][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 156.146588][ C0] Call Trace:
[ 156.149848][ C0]
[ 156.152697][ C0] dump_stack+0x11d/0x187
[ 156.157021][ C0] panic+0x210/0x640
[ 156.160991][ C0] ? vprintk_func+0x89/0x13a
[ 156.165585][ C0] kcsan_report.cold+0xc/0x14
[ 156.170319][ C0] kcsan_setup_watchpoint+0x3e3/0x420
[ 156.175688][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 156.181259][ C0] mod_timer+0x50e/0x830
[ 156.185511][ C0] sk_reset_timer+0x29/0xc0
[ 156.190003][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 156.195190][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 156.200303][ C0] ? constant_test_bit+0xd/0x30
[ 156.205142][ C0] tcp_rcv_established+0x72b/0xee0
[ 156.210256][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 156.214826][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 156.219338][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 156.224699][ C0] ip_local_deliver_finish+0xf3/0x120
[ 156.230059][ C0] ip_local_deliver+0x135/0x220
[ 156.234919][ C0] ? ip_protocol_deliver_rcu+0x410/0x410
[ 156.240539][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 156.245719][ C0] ip_sublist_rcv+0x3f8/0x530
[ 156.250410][ C0] ? ip_sublist_rcv+0x530/0x530
[ 156.255248][ C0] ip_list_rcv+0x2f3/0x321
[ 156.259649][ C0] ? ip_rcv+0x1b0/0x1b0
[ 156.263810][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 156.269792][ C0] ? ktime_get_with_offset+0x1e6/0x230
[ 156.275242][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 156.281403][ C0] gro_normal_list.part.0+0x37/0xa0
[ 156.286602][ C0] ? __write_once_size+0x7c/0x100
[ 156.291884][ C0] gro_normal_one+0x14c/0x160
[ 156.296740][ C0] napi_gro_receive+0x27d/0x2f0
[ 156.301578][ C0] receive_buf+0x24e/0x2e20
[ 156.306067][ C0] ? common_interrupt+0xf/0xf
[ 156.310722][ C0] ? common_interrupt+0xa/0xf
[ 156.315405][ C0] virtnet_poll+0x343/0x790
[ 156.319926][ C0] ? rcu_dynticks_curr_cpu_in_eqs+0x70/0xa0
[ 156.325831][ C0] net_rx_action+0x3ad/0xac0
[ 156.330448][ C0] __do_softirq+0x118/0x34a
[ 156.334961][ C0] irq_exit+0xb5/0xd0
[ 156.338927][ C0] do_IRQ+0x7b/0x120
[ 156.342989][ C0] common_interrupt+0xf/0xf
[ 156.347519][ C0]
[ 156.350452][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 156.355812][ 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
[ 156.375404][ C0] RSP: 0018:ffffffff85a03e50 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda
[ 156.383926][ C0] RAX: 0000000000000000 RBX: ffffffff85a2b840 RCX: ffffffff825221d1
[ 156.391944][ C0] RDX: 0000000000000000 RSI: ffffffff825221da RDI: 0000000000000005
[ 156.399898][ C0] RBP: 0000000000000000 R08: ffffffff85a2b840 R09: 0000ffff8584b160
[ 156.407970][ C0] R10: 0000ffff85a03e38 R11: 0000ffff8584b167 R12: ffffffff85a2b840
[ 156.416133][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff85a2b840
[ 156.424230][ C0] ? debug_smp_processor_id+0x31/0x129
[ 156.429766][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 156.435300][ C0] default_idle+0x21/0x170
[ 156.439706][ C0] do_idle+0x1b7/0x290
[ 156.443779][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 156.449275][ C0] cpu_startup_entry+0x14/0x20
[ 156.454045][ C0] rest_init+0xe4/0xeb
[ 156.458223][ C0] arch_call_rest_init+0x13/0x2b
[ 156.463144][ C0] start_kernel+0xcc2/0xceb
[ 156.467674][ C0] secondary_startup_64+0xa4/0xb0
[ 156.474176][ C0] Kernel Offset: disabled
[ 156.478538][ C0] Rebooting in 86400 seconds..