[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.1.15' (ECDSA) to the list of known hosts.
2020/04/17 13:49:31 fuzzer started
2020/04/17 13:49:33 dialing manager at 10.128.0.105:37921
2020/04/17 13:49:33 syscalls: 2960
2020/04/17 13:49:33 code coverage: enabled
2020/04/17 13:49:33 comparison tracing: enabled
2020/04/17 13:49:33 extra coverage: enabled
2020/04/17 13:49:33 setuid sandbox: enabled
2020/04/17 13:49:33 namespace sandbox: enabled
2020/04/17 13:49:33 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/17 13:49:33 fault injection: enabled
2020/04/17 13:49:33 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/17 13:49:33 net packet injection: enabled
2020/04/17 13:49:33 net device setup: enabled
2020/04/17 13:49:33 concurrency sanitizer: enabled
2020/04/17 13:49:33 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/17 13:49:33 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [ 42.967840][ T6722] KCSAN: could not find function: '_find_next_bit'
2020/04/17 13:49:38 adding functions to KCSAN blacklist: 'ext4_mb_good_group' 'tick_sched_do_timer' 'commit_echoes' '_find_next_bit' 'mod_timer' 'dd_has_work' 'ep_poll' 'xas_clear_mark' 'add_timer' 'shmem_getpage_gfp' 'shmem_file_read_iter' 'ext4_mark_iloc_dirty' '__snd_rawmidi_transmit_ack' 'vm_area_dup' 'tick_nohz_next_event' 'run_timer_softirq' 'pcpu_alloc' 'io_sq_thread' 'find_get_pages_range_tag' 'page_counter_charge' 'wbt_done' 'ktime_get_ts64' 'blk_mq_get_request' 'echo_char' 'do_syslog' 'ext4_free_inodes_count' '__ext4_new_inode' 'kauditd_thread' 'n_tty_receive_buf_common' 'copy_process' 'generic_fillattr' 'do_nanosleep' 'blk_mq_sched_dispatch_requests' 'audit_log_start' 'alloc_pid' 'tick_nohz_idle_stop_tick' 'do_exit' 'ktime_get_real_seconds' '__skb_wait_for_more_packets' 'generic_write_end' 'attach_to_pi_owner' 'blk_mq_dispatch_rq_list'
[ 156.064627][ C0] ==================================================================
[ 156.072807][ C0] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 156.081201][ C0]
[ 156.083517][ C0] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1:
[ 156.090869][ C0] timer_clear_idle+0x3d/0x50
[ 156.095578][ C0] __tick_nohz_idle_restart_tick+0x32/0x1a0
[ 156.101473][ C0] tick_nohz_idle_exit+0x19c/0x1d0
[ 156.106787][ C0] do_idle+0xac/0x290
[ 156.110778][ C0] cpu_startup_entry+0x14/0x20
[ 156.115529][ C0] start_secondary+0x169/0x1b0
[ 156.120296][ C0] secondary_startup_64+0xa4/0xb0
[ 156.125296][ C0]
[ 156.127614][ C0] read to 0xffff88812c11dca4 of 1 bytes by interrupt on cpu 0:
[ 156.135164][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 156.140689][ C0] mod_timer+0x50e/0x830
[ 156.144927][ C0] sk_reset_timer+0x29/0xc0
[ 156.149605][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 156.154800][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 156.159911][ C0] tcp_rcv_established+0x72b/0xee0
[ 156.165004][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 156.169680][ C0] tcp_v4_rcv+0x1c55/0x1e10
[ 156.174282][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 156.179649][ C0] ip_local_deliver_finish+0xf3/0x120
[ 156.185073][ C0] ip_local_deliver+0x135/0x220
[ 156.189910][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 156.195088][ C0] ip_sublist_rcv+0x3f8/0x530
[ 156.199746][ C0] ip_list_rcv+0x2f3/0x321
[ 156.204146][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 156.210110][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 156.216247][ C0] gro_normal_list.part.0+0x37/0xa0
[ 156.221436][ C0] gro_normal_one+0x14c/0x160
[ 156.226098][ C0] napi_gro_receive+0x27d/0x2f0
[ 156.230939][ C0] receive_buf+0x252/0x2ed0
[ 156.235505][ C0] virtnet_poll+0x343/0x790
[ 156.240273][ C0] net_rx_action+0x3ad/0xac0
[ 156.244871][ C0] __do_softirq+0x118/0x34a
[ 156.249366][ C0] irq_exit+0xb5/0xd0
[ 156.253362][ C0] do_IRQ+0x7b/0x120
[ 156.257356][ C0] ret_from_intr+0x0/0x21
[ 156.261673][ C0] native_safe_halt+0xe/0x10
[ 156.266255][ C0] default_idle+0x21/0x170
[ 156.270743][ C0] do_idle+0x1b7/0x290
[ 156.274800][ C0] cpu_startup_entry+0x14/0x20
[ 156.279560][ C0] rest_init+0xe4/0xeb
[ 156.283627][ C0] arch_call_rest_init+0x13/0x2b
[ 156.288543][ C0] start_kernel+0x82d/0x852
[ 156.293413][ C0] secondary_startup_64+0xa4/0xb0
[ 156.298776][ C0]
[ 156.301113][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 156.307270][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 156.315486][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 156.325689][ C0] ==================================================================
[ 156.334408][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 156.341367][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 156.349426][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 156.359487][ C0] Call Trace:
[ 156.362805][ C0]
[ 156.365783][ C0] dump_stack+0x11d/0x187
[ 156.370132][ C0] panic+0x210/0x640
[ 156.374028][ C0] ? vprintk_func+0x89/0x13a
[ 156.378750][ C0] kcsan_report.cold+0xc/0x1a
[ 156.383472][ C0] kcsan_setup_watchpoint+0x3fb/0x440
[ 156.389136][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 156.394807][ C0] mod_timer+0x50e/0x830
[ 156.399055][ C0] sk_reset_timer+0x29/0xc0
[ 156.403549][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 156.408733][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 156.413831][ C0] ? constant_test_bit+0xd/0x30
[ 156.418766][ C0] tcp_rcv_established+0x72b/0xee0
[ 156.423901][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 156.428477][ C0] tcp_v4_rcv+0x1c55/0x1e10
[ 156.432973][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 156.438334][ C0] ip_local_deliver_finish+0xf3/0x120
[ 156.443692][ C0] ip_local_deliver+0x135/0x220
[ 156.448529][ C0] ? ip_protocol_deliver_rcu+0x410/0x410
[ 156.454161][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 156.459345][ C0] ip_sublist_rcv+0x3f8/0x530
[ 156.464010][ C0] ? ip_sublist_rcv+0x530/0x530
[ 156.468857][ C0] ip_list_rcv+0x2f3/0x321
[ 156.473270][ C0] ? ip_rcv+0x1b0/0x1b0
[ 156.477509][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 156.483490][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 156.489656][ C0] gro_normal_list.part.0+0x37/0xa0
[ 156.494949][ C0] ? __write_once_size+0x7c/0x100
[ 156.499993][ C0] gro_normal_one+0x14c/0x160
[ 156.504785][ C0] napi_gro_receive+0x27d/0x2f0
[ 156.509701][ C0] receive_buf+0x252/0x2ed0
[ 156.514382][ C0] ? virtqueue_get_buf_ctx+0x4db/0x5c0
[ 156.519925][ C0] virtnet_poll+0x343/0x790
[ 156.524836][ C0] ? rcu_dynticks_curr_cpu_in_eqs+0x70/0xa0
[ 156.530826][ C0] net_rx_action+0x3ad/0xac0
[ 156.535429][ C0] __do_softirq+0x118/0x34a
[ 156.540034][ C0] irq_exit+0xb5/0xd0
[ 156.544010][ C0] do_IRQ+0x7b/0x120
[ 156.547953][ C0] common_interrupt+0xf/0xf
[ 156.552438][ C0]
[ 156.555887][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 156.561275][ C0] Code: ff cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 1c be 57 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 0c be 57 00 fb f4 cc 41 54 55 53 e8 97 f1 8e fc e8 b2 58 ab fd 0f 1f 44 00 00 48
[ 156.581196][ C0] RSP: 0018:ffffffff85c03e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda
[ 156.589596][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b840 RCX: ffffffff82561ff1
[ 156.597696][ C0] RDX: 0000000000000000 RSI: ffffffff82561ffa RDI: 0000000000000005
[ 156.605744][ C0] RBP: 0000000000000000 R08: ffffffff85c2b840 R09: 0000ffff85a6c920
[ 156.614149][ C0] R10: 0000ffff85c03e58 R11: 0000ffff85a6c927 R12: ffffffff85c2b840
[ 156.622524][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff85c2b840
[ 156.630785][ C0] ? debug_smp_processor_id+0x31/0x129
[ 156.636244][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 156.641698][ C0] default_idle+0x21/0x170
[ 156.646228][ C0] do_idle+0x1b7/0x290
[ 156.650475][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 156.655942][ C0] cpu_startup_entry+0x14/0x20
[ 156.660691][ C0] rest_init+0xe4/0xeb
[ 156.664763][ C0] arch_call_rest_init+0x13/0x2b
[ 156.669702][ C0] start_kernel+0x82d/0x852
[ 156.674204][ C0] secondary_startup_64+0xa4/0xb0
[ 156.680711][ C0] Kernel Offset: disabled
[ 156.685042][ C0] Rebooting in 86400 seconds..