[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 45.361243][ T27] audit: type=1800 audit(1583310101.000:21): pid=7585 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 45.382028][ T27] audit: type=1800 audit(1583310101.020:22): pid=7585 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.
2020/03/04 08:21:50 fuzzer started
2020/03/04 08:21:51 dialing manager at 10.128.0.105:43249
2020/03/04 08:21:52 syscalls: 2955
2020/03/04 08:21:52 code coverage: enabled
2020/03/04 08:21:52 comparison tracing: enabled
2020/03/04 08:21:52 extra coverage: enabled
2020/03/04 08:21:52 setuid sandbox: enabled
2020/03/04 08:21:52 namespace sandbox: enabled
2020/03/04 08:21:52 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/04 08:21:52 fault injection: enabled
2020/03/04 08:21:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/04 08:21:52 net packet injection: enabled
2020/03/04 08:21:52 net device setup: enabled
2020/03/04 08:21:52 concurrency sanitizer: enabled
2020/03/04 08:21:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 56.958341][ T7748] KCSAN: could not find function: 'poll_schedule_timeout'
[ 58.493619][ T7748] KCSAN: could not find function: '_find_next_bit'
[ 61.700026][ T7748] KCSAN: could not find function: 'calc_wb_limits'
2020/03/04 08:21:57 adding functions to KCSAN blacklist: 'poll_schedule_timeout' 'blk_mq_dispatch_rq_list' '__process_echoes' 'integrity_iint_find' 'generic_file_read_iter' 'do_readlinkat' 'wbt_done' 'futex_wait_queue_me' 'blk_mq_sched_dispatch_requests' 'ext4_mark_iloc_dirty' 'pcpu_alloc' 'do_syslog' 'page_counter_charge' '_find_next_bit' 'generic_fillattr' 'do_exit' 'tick_sched_do_timer' 'ext4_has_free_clusters' 'ext4_mb_good_group' 'pipe_double_lock' 'ext4_nonda_switch' 'page_counter_try_charge' 'shmem_file_read_iter' '__add_to_page_cache_locked' 'generic_write_end' 'kauditd_thread' 'copy_process' 'tick_nohz_next_event' 'audit_log_start' 'do_signal_stop' 'do_nanosleep' 'ep_poll' '__ext4_new_inode' 'echo_char' 'xas_find_marked' '__mark_inode_dirty' 'print_cpu' 'blk_mq_get_request' 'find_get_pages_range_tag' 'ktime_get_real_seconds' 'add_timer' 'xas_clear_mark' 'mod_timer' 'shmem_getpage_gfp' 'tick_nohz_idle_stop_tick' 'calc_wb_limits' 'run_timer_softirq' 'ext4_free_inodes_count'
[ 152.669021][ C0] ==================================================================
[ 152.677192][ C0] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 152.685576][ C0]
[ 152.687896][ C0] write to 0xffff88812c11dbe4 of 1 bytes by task 0 on cpu 1:
[ 152.695256][ C0] timer_clear_idle+0x3d/0x50
[ 152.699914][ C0] __tick_nohz_idle_restart_tick+0x32/0x1a0
[ 152.705815][ C0] tick_nohz_idle_exit+0x19c/0x1d0
[ 152.710903][ C0] do_idle+0xac/0x290
[ 152.714869][ C0] cpu_startup_entry+0x14/0x20
[ 152.719613][ C0] start_secondary+0x164/0x1b0
[ 152.724363][ C0] secondary_startup_64+0xa4/0xb0
[ 152.729353][ C0]
[ 152.731691][ C0] read to 0xffff88812c11dbe4 of 1 bytes by interrupt on cpu 0:
[ 152.739211][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 152.744738][ C0] mod_timer+0x50e/0x830
[ 152.748978][ C0] sk_reset_timer+0x29/0xc0
[ 152.753454][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 152.758649][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 152.763744][ C0] tcp_rcv_established+0x72b/0xee0
[ 152.768840][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 152.773414][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 152.777901][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 152.783306][ C0] ip_local_deliver_finish+0xf3/0x120
[ 152.788665][ C0] ip_local_deliver+0x135/0x220
[ 152.793506][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 152.798694][ C0] ip_sublist_rcv+0x3f8/0x530
[ 152.803384][ C0] ip_list_rcv+0x2f3/0x321
[ 152.807792][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 152.813763][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 152.819897][ C0] gro_normal_list.part.0+0x37/0xa0
[ 152.825104][ C0] napi_complete_done+0x1d3/0x3a0
[ 152.830113][ C0] virtqueue_napi_complete+0x36/0xa0
[ 152.835371][ C0] virtnet_poll+0x771/0x790
[ 152.839854][ C0] net_rx_action+0x3ad/0xac0
[ 152.844423][ C0] __do_softirq+0x118/0x34a
[ 152.848920][ C0] irq_exit+0xb5/0xd0
[ 152.852879][ C0] do_IRQ+0x7b/0x120
[ 152.856746][ C0] ret_from_intr+0x0/0x21
[ 152.861054][ C0] native_safe_halt+0xe/0x10
[ 152.865617][ C0] default_idle+0x21/0x170
[ 152.870040][ C0] do_idle+0x1b7/0x290
[ 152.874117][ C0] cpu_startup_entry+0x14/0x20
[ 152.878873][ C0] rest_init+0xe4/0xeb
[ 152.882939][ C0] arch_call_rest_init+0x13/0x2b
[ 152.887869][ C0] start_kernel+0xcc2/0xceb
[ 152.892363][ C0] secondary_startup_64+0xa4/0xb0
[ 152.897357][ C0]
[ 152.899699][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 152.905829][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 152.913806][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 152.923838][ C0] ==================================================================
[ 152.931876][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 152.938454][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[ 152.946332][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 152.956368][ C0] Call Trace:
[ 152.959632][ C0]
[ 152.962475][ C0] dump_stack+0x11d/0x187
[ 152.966789][ C0] panic+0x210/0x640
[ 152.970690][ C0] ? vprintk_func+0x89/0x13a
[ 152.975275][ C0] kcsan_report.cold+0xc/0x14
[ 152.979965][ C0] kcsan_setup_watchpoint+0x304/0x400
[ 152.985446][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 152.991013][ C0] mod_timer+0x50e/0x830
[ 152.995247][ C0] sk_reset_timer+0x29/0xc0
[ 152.999767][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 153.004952][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 153.010043][ C0] ? constant_test_bit+0xd/0x30
[ 153.014875][ C0] tcp_rcv_established+0x72b/0xee0
[ 153.019977][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 153.024551][ C0] tcp_v4_rcv+0x1bbf/0x1d80
[ 153.029046][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 153.034402][ C0] ip_local_deliver_finish+0xf3/0x120
[ 153.039759][ C0] ip_local_deliver+0x135/0x220
[ 153.044587][ C0] ? ip_protocol_deliver_rcu+0x410/0x410
[ 153.050201][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 153.055374][ C0] ip_sublist_rcv+0x3f8/0x530
[ 153.060064][ C0] ? ip_sublist_rcv+0x530/0x530
[ 153.064937][ C0] ip_list_rcv+0x2f3/0x321
[ 153.069366][ C0] ? ip_rcv+0x1b0/0x1b0
[ 153.073500][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 153.079465][ C0] ? ktime_get_with_offset+0x1e6/0x230
[ 153.084947][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 153.091087][ C0] ? receive_buf+0x25d/0x2e20
[ 153.095758][ C0] gro_normal_list.part.0+0x37/0xa0
[ 153.100944][ C0] napi_complete_done+0x1d3/0x3a0
[ 153.105955][ C0] ? virtqueue_enable_cb_prepare+0x19b/0x2a0
[ 153.111932][ C0] virtqueue_napi_complete+0x36/0xa0
[ 153.117199][ C0] virtnet_poll+0x771/0x790
[ 153.121695][ C0] net_rx_action+0x3ad/0xac0
[ 153.126290][ C0] __do_softirq+0x118/0x34a
[ 153.130790][ C0] irq_exit+0xb5/0xd0
[ 153.134765][ C0] do_IRQ+0x7b/0x120
[ 153.138649][ C0] common_interrupt+0xf/0xf
[ 153.143149][ C0]
[ 153.146066][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 153.151436][ 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 a7 fd 9a fc e8 12 ae b3 fd 0f 1f 44 00 00 48
[ 153.171019][ C0] RSP: 0018:ffffffff85a03e50 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda
[ 153.179408][ C0] RAX: 0000000000000000 RBX: ffffffff85a2b840 RCX: ffffffff82521f51
[ 153.187364][ C0] RDX: 0000000000000000 RSI: ffffffff82521f5a RDI: 0000000000000005
[ 153.195313][ C0] RBP: 0000000000000000 R08: ffffffff85a2b840 R09: 0000ffff8584b160
[ 153.203381][ C0] R10: 0000ffff85a03e38 R11: 0000ffff8584b167 R12: ffffffff85a2b840
[ 153.211333][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff85a2b840
[ 153.219380][ C0] ? debug_smp_processor_id+0x31/0x129
[ 153.224814][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 153.230255][ C0] default_idle+0x21/0x170
[ 153.234650][ C0] do_idle+0x1b7/0x290
[ 153.238707][ C0] ? debug_smp_processor_id+0x3f/0x129
[ 153.244158][ C0] cpu_startup_entry+0x14/0x20
[ 153.248909][ C0] rest_init+0xe4/0xeb
[ 153.252970][ C0] arch_call_rest_init+0x13/0x2b
[ 153.257896][ C0] start_kernel+0xcc2/0xceb
[ 153.262429][ C0] secondary_startup_64+0xa4/0xb0
[ 153.268630][ C0] Kernel Offset: disabled
[ 153.272949][ C0] Rebooting in 86400 seconds..