[[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 '10.128.10.43' (ECDSA) to the list of known hosts.
2020/05/18 09:54:20 fuzzer started
2020/05/18 09:54:20 dialing manager at 10.128.0.105:43791
2020/05/18 09:54:20 syscalls: 3055
2020/05/18 09:54:20 code coverage: enabled
2020/05/18 09:54:20 comparison tracing: enabled
2020/05/18 09:54:20 extra coverage: enabled
2020/05/18 09:54:20 setuid sandbox: enabled
2020/05/18 09:54:20 namespace sandbox: enabled
2020/05/18 09:54:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/18 09:54:20 fault injection: enabled
2020/05/18 09:54:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/18 09:54:20 net packet injection: enabled
2020/05/18 09:54:20 net device setup: enabled
2020/05/18 09:54:20 concurrency sanitizer: enabled
2020/05/18 09:54:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/18 09:54:20 USB emulation: enabled
syzkaller login: [ 49.572985][ T8916] KCSAN: could not find function: '_find_next_bit'
[ 51.801819][ T8916] KCSAN: could not find function: 'poll_schedule_timeout'
[ 58.752172][ T8916] KCSAN: could not find function: 'fprop_reflect_period_percpu'
2020/05/18 09:54:32 adding functions to KCSAN blacklist: 'mod_timer' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'wbt_issue' '_find_next_bit' 'run_timer_softirq' 'n_tty_receive_buf_common' 'shmem_file_read_iter' 'ext4_mark_iloc_dirty' '__writeback_single_inode' 'fasync_remove_entry' 'io_sq_thread' '__snd_rawmidi_transmit_ack' 'install_new_memslots' 'xprt_connect' 'lruvec_lru_size' 'tick_nohz_idle_stop_tick' 'poll_schedule_timeout' 'emulator_read_write_onepage' 'iput' 'find_get_pages_range_tag' 'blk_mq_get_request' '__delete_from_page_cache' 'wbt_done' 'ondemand_readahead' 'filemap_fault' 'file_remove_privs' 'generic_write_end' 'echo_char' 'packet_do_bind' 'dd_has_work' 'futex_wait_queue_me' 'snd_seq_check_queue' 'wg_packet_send_staged_packets' 'audit_log_start' 'ion_page_pool_remove' '__process_echoes' 'kcm_rfree' 'pcpu_alloc' 'shmem_add_to_page_cache' 'ion_heap_deferred_free' '__bpf_lru_node_move_in' 'copy_process' 'do_exit' 'atime_needs_update' '__alloc_fd' 'tick_sched_do_timer' 'ep_poll' 'blk_mq_sched_dispatch_requests' 'alloc_pid' 'ext4_writepages' 'shmem_getpage_gfp' 'vm_area_dup' '__perf_event_overflow' 'do_wait' 'inode_sync_complete' 'ktime_get_seconds' 'ksys_write' 'add_timer' 'do_syslog' '__put_unused_fd' '__add_to_page_cache_locked' 'ext4_sync_file' '__ext4_new_inode' 'kauditd_thread' '__mark_inode_dirty' 'fsnotify' 'ext4_setattr' 'exit_signals' 'page_counter_charge' 'ktime_get_real_seconds' '__filemap_fdatawrite_range' 'commit_echoes' 'kvm_mmu_notifier_invalidate_range_end' 'generic_fillattr' 'do_signal_stop' 'ext4_free_inodes_count' 'list_lru_add' 'fprop_reflect_period_percpu' 'do_nanosleep' 'blk_mq_request_bypass_insert' 'xas_find_marked' 'decrypt_packet'
[ 208.290644][ C0] ==================================================================
[ 208.298888][ C0] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 208.307291][ C0]
[ 208.309602][ C0] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1:
[ 208.316954][ C0] timer_clear_idle+0x3d/0x50
[ 208.321614][ C0] __tick_nohz_idle_restart_tick+0x32/0x1a0
[ 208.327491][ C0] tick_nohz_idle_exit+0x19c/0x1d0
[ 208.332581][ C0] do_idle+0xac/0x290
[ 208.336537][ C0] cpu_startup_entry+0x14/0x20
[ 208.341277][ C0] start_secondary+0x169/0x1b0
[ 208.346031][ C0] secondary_startup_64+0xa4/0xb0
[ 208.351022][ C0]
[ 208.353346][ C0] read to 0xffff88812c11dca4 of 1 bytes by interrupt on cpu 0:
[ 208.360867][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 208.366388][ C0] mod_timer+0x3d7/0x830
[ 208.370797][ C0] sk_reset_timer+0x29/0xc0
[ 208.375296][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 208.380470][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 208.385584][ C0] tcp_rcv_established+0x72b/0xee0
[ 208.390788][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 208.395357][ C0] tcp_v4_rcv+0x1c55/0x1e10
[ 208.399841][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 208.405195][ C0] ip_local_deliver_finish+0xf3/0x120
[ 208.410561][ C0] ip_local_deliver+0x135/0x220
[ 208.415388][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 208.420560][ C0] ip_sublist_rcv+0x3f8/0x530
[ 208.425210][ C0] ip_list_rcv+0x2f3/0x321
[ 208.429619][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 208.435596][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 208.441852][ C0] gro_normal_list.part.0+0x37/0xa0
[ 208.447034][ C0] gro_normal_one+0x14c/0x160
[ 208.451695][ C0] napi_gro_receive+0x27d/0x2f0
[ 208.456524][ C0] receive_buf+0x24c/0x3420
[ 208.461004][ C0] virtnet_poll+0x343/0x790
[ 208.465485][ C0] net_rx_action+0x3ad/0xac0
[ 208.470053][ C0] __do_softirq+0x118/0x34a
[ 208.474531][ C0] irq_exit+0xb5/0xd0
[ 208.478493][ C0] do_IRQ+0x7b/0x120
[ 208.482366][ C0] ret_from_intr+0x0/0x21
[ 208.486672][ C0] native_safe_halt+0xe/0x10
[ 208.491242][ C0] default_idle+0x21/0x170
[ 208.495657][ C0] do_idle+0x1b7/0x290
[ 208.499706][ C0] cpu_startup_entry+0x14/0x20
[ 208.504463][ C0] rest_init+0xe4/0xeb
[ 208.508512][ C0] arch_call_rest_init+0x13/0x2b
[ 208.513426][ C0] start_kernel+0x7fe/0x823
[ 208.517910][ C0] secondary_startup_64+0xa4/0xb0
[ 208.522921][ C0]
[ 208.525222][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 208.531373][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 208.539237][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 208.549271][ C0] ==================================================================
[ 208.557313][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 208.563879][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[ 208.571754][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 208.581791][ C0] Call Trace:
[ 208.585052][ C0]
[ 208.587893][ C0] dump_stack+0x11d/0x187
[ 208.592227][ C0] panic+0x210/0x640
[ 208.596102][ C0] ? vprintk_func+0x89/0x13a
[ 208.600702][ C0] kcsan_report.cold+0xc/0x1a
[ 208.605368][ C0] kcsan_setup_watchpoint+0x3fb/0x440
[ 208.610728][ C0] trigger_dyntick_cpu.isra.0+0x6d/0xf0
[ 208.616507][ C0] mod_timer+0x3d7/0x830
[ 208.620844][ C0] sk_reset_timer+0x29/0xc0
[ 208.625331][ C0] tcp_send_delayed_ack+0x1fd/0x280
[ 208.630600][ C0] __tcp_ack_snd_check+0x3bb/0x550
[ 208.635742][ C0] ? constant_test_bit+0xd/0x30
[ 208.640765][ C0] tcp_rcv_established+0x72b/0xee0
[ 208.645870][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 208.650457][ C0] tcp_v4_rcv+0x1c55/0x1e10
[ 208.654957][ C0] ip_protocol_deliver_rcu+0x4b/0x410
[ 208.660358][ C0] ip_local_deliver_finish+0xf3/0x120
[ 208.665709][ C0] ip_local_deliver+0x135/0x220
[ 208.670547][ C0] ? ip_protocol_deliver_rcu+0x410/0x410
[ 208.676157][ C0] ip_sublist_rcv_finish+0xf0/0x140
[ 208.681332][ C0] ip_sublist_rcv+0x3f8/0x530
[ 208.685995][ C0] ? ip_sublist_rcv+0x530/0x530
[ 208.690822][ C0] ip_list_rcv+0x2f3/0x321
[ 208.697062][ C0] ? ip_rcv+0x1b0/0x1b0
[ 208.701202][ C0] __netif_receive_skb_list_core+0x368/0x5c0
[ 208.707267][ C0] ? ktime_get_with_offset+0x1e6/0x230
[ 208.712711][ C0] netif_receive_skb_list_internal+0x5c7/0x810
[ 208.718853][ C0] gro_normal_list.part.0+0x37/0xa0
[ 208.724032][ C0] ? __write_once_size+0x7c/0x100
[ 208.729043][ C0] gro_normal_one+0x14c/0x160
[ 208.733980][ C0] napi_gro_receive+0x27d/0x2f0
[ 208.738913][ C0] receive_buf+0x24c/0x3420
[ 208.743404][ C0] ? virtqueue_get_buf_ctx+0x4db/0x5c0
[ 208.749022][ C0] virtnet_poll+0x343/0x790
[ 208.753700][ C0] ? rcu_dynticks_curr_cpu_in_eqs+0x70/0xa0
[ 208.759587][ C0] net_rx_action+0x3ad/0xac0
[ 208.764170][ C0] __do_softirq+0x118/0x34a
[ 208.768668][ C0] irq_exit+0xb5/0xd0
[ 208.772645][ C0] do_IRQ+0x7b/0x120
[ 208.776543][ C0] common_interrupt+0xf/0xf
[ 208.781015][ C0]
[ 208.783976][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 208.789364][ C0] Code: ff cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 0c d6 58 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d fc d5 58 00 fb f4 cc 41 54 55 53 e8 97 b2 71 fb e8 a2 21 bc fc 0f 1f 44 00 00 48
[ 208.808978][ C0] RSP: 0018:ffffffff87203e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda
[ 208.817403][ C0] RAX: 0000000000000000 RBX: ffffffff8722b840 RCX: ffffffff8285fdf1
[ 208.825434][ C0] RDX: 0000000000000000 RSI: ffffffff8285fdfa RDI: 0000000000000005
[ 208.833411][ C0] RBP: 0000000000000000 R08: ffffffff8722b840 R09: 0000ffff87047920
[ 208.841416][ C0] R10: 0000ffff87203e58 R11: 0000ffff87047927 R12: ffffffff8722b840
[ 208.849367][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8722b840
[ 208.857351][ C0] ? debug_smp_processor_id+0x31/0x129
[ 208.862806][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 208.868252][ C0] default_idle+0x21/0x170
[ 208.872713][ C0] do_idle+0x1b7/0x290
[ 208.876852][ C0] ? debug_smp_processor_id+0x3a/0x129
[ 208.882307][ C0] cpu_startup_entry+0x14/0x20
[ 208.887146][ C0] rest_init+0xe4/0xeb
[ 208.891201][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[ 208.897535][ C0] arch_call_rest_init+0x13/0x2b
[ 208.902456][ C0] start_kernel+0x7fe/0x823
[ 208.906944][ C0] secondary_startup_64+0xa4/0xb0
[ 208.913278][ C0] Kernel Offset: disabled
[ 208.917606][ C0] Rebooting in 86400 seconds..