Warning: Permanently added '10.128.0.148' (ECDSA) to the list of known hosts. 2019/10/25 00:00:34 fuzzer started 2019/10/25 00:00:36 dialing manager at 10.128.0.105:42135 2019/10/25 00:00:37 syscalls: 2524 2019/10/25 00:00:37 code coverage: enabled 2019/10/25 00:00:37 comparison tracing: enabled 2019/10/25 00:00:37 extra coverage: extra coverage is not supported by the kernel 2019/10/25 00:00:37 setuid sandbox: enabled 2019/10/25 00:00:37 namespace sandbox: enabled 2019/10/25 00:00:37 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/25 00:00:37 fault injection: enabled 2019/10/25 00:00:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/25 00:00:37 net packet injection: enabled 2019/10/25 00:00:37 net device setup: enabled 2019/10/25 00:00:37 concurrency sanitizer: enabled syzkaller login: [ 54.039443][ T7331] KCSAN: could not find function: 'poll_schedule_timeout' 2019/10/25 00:01:03 adding functions to KCSAN blacklist: '__dev_queue_xmit' 'ipip_tunnel_xmit' 'exit_signals' 'dput' 'pid_update_inode' 'atime_needs_update' 'shmem_getpage_gfp' 'kvm_arch_vcpu_load' '__neigh_event_send' 'snd_seq_check_queue' 'hrtimer_wakeup' '__thaw_task' 'rcu_gp_fqs_check_wake' 'mod_timer' 'do_signal_stop' '__do_page_fault' 'kernfs_refresh_inode' 'task_dump_owner' 'add_timer_on' 'ktime_get_seconds' 'poll_schedule_timeout' 'run_timer_softirq' 'snd_seq_timer_get_cur_tick' 'filemap_map_pages' '__rcu_read_unlock' '__add_to_page_cache_locked' 'mem_cgroup_select_victim_node' 'ext4_has_free_clusters' 'snd_ctl_notify' 'tomoyo_supervisor' 'wbt_issue' 'blk_mq_get_request' '__skb_try_recv_from_queue' '__ip6_make_skb' 'find_next_bit' '__splice_from_pipe' '__mark_inode_dirty' 'do_exit' 'lookup_fast' 'do_wait' '__tcp_select_window' 'process_srcu' 'tick_nohz_idle_stop_tick' 'balance_dirty_pages' 'osq_lock' 'p9_poll_workfn' 'wq_watchdog_reset_touched' 'ext4_nonda_switch' 'bio_endio' 'sit_tunnel_xmit' 'ext4_writepages' 'shmem_file_read_iter' 'ext4_mark_iloc_dirty' '__delete_from_page_cache' '__hrtimer_run_queues' '__alloc_file' 'iput' 'kvm_arch_vcpu_create' 'mem_cgroup_protected' 'vm_area_dup' '__ext4_new_inode' 'kvm_write_tsc' 'padata_find_next' '__perf_event_overflow' 'audit_log_start' 'evict' 'ktime_get_real_seconds' '__writeback_single_inode' 'ext4_free_inode' 'update_defense_level' 'blk_mq_dispatch_rq_list' '__filemap_fdatawrite_range' 'vti_tunnel_xmit' 'tick_do_update_jiffies64' 'tcp_add_backlog' 'find_get_pages_range_tag' 'lru_add_drain_all' 'wbc_detach_inode' 'inet_putpeer' 'kauditd_thread' 'ep_poll' 'tcp_poll' 'tick_sched_do_timer' 'snapshot_refaults' 'xas_find_marked' 'get_task_cred' 'add_timer' 'install_new_memslots' 'ext4_mb_good_group' 'timer_clear_idle' '__acct_update_integrals' '__dentry_kill' 'generic_write_end' 'sk_wait_data' 'wbt_wait' 'yama_ptracer_del' '__skb_wait_for_more_packets' 'lookup_user_key' 'rcu_gp_fqs_loop' 'list_lru_count_one' 'blk_mq_free_request' 'snd_seq_prioq_cell_out' 'copy_process' 'pipe_wait' 'blk_mq_run_hw_queue' 'udp6_lib_lookup2' 'pcpu_alloc' 'unix_release_sock' 'ext4_da_write_end' 'ext4_free_inodes_count' 'icmp_global_allow' 'smpboot_thread_fn' 'generic_permission' '__nf_ct_refresh_acct' 'do_syslog' 'd_delete' '__find_get_block' 'kswapd' 'neigh_resolve_output' 'pipe_poll' 'l2tp_tunnel_del_work' 'generic_fillattr' 'fasync_remove_entry' 'dd_has_work' 'mm_update_next_owner' 'fsnotify' 'page_counter_try_charge' 'sbitmap_queue_clear' 'copy_creds' 'do_nanosleep' 'blk_mq_sched_dispatch_requests' 'do_readlinkat' 'kvm_mmu_notifier_invalidate_range_end' 'virtqueue_disable_cb' 'taskstats_exit' '__snd_rawmidi_transmit_ack' [ 95.488400][ T7321] ================================================================== [ 95.497566][ T7321] BUG: KCSAN: data-race in handle_mm_fault / watchdog [ 95.504395][ T7321] [ 95.506714][ T7321] read to 0xffff8881224a1010 of 8 bytes by task 1061 on cpu 0: [ 95.514250][ T7321] watchdog+0x2c3/0x7c0 [ 95.518398][ T7321] kthread+0x1d4/0x200 [ 95.522553][ T7321] ret_from_fork+0x1f/0x30 [ 95.526945][ T7321] [ 95.529262][ T7321] write to 0xffff8881224a1010 of 8 bytes by task 7321 on cpu 1: [ 95.536884][ T7321] handle_mm_fault+0x4a/0x530 [ 95.541547][ T7321] __do_page_fault+0x3fb/0x9e0 [ 95.546328][ T7321] do_page_fault+0x54/0x233 [ 95.550824][ T7321] page_fault+0x34/0x40 [ 95.554972][ T7321] [ 95.557282][ T7321] Reported by Kernel Concurrency Sanitizer on: [ 95.563422][ T7321] CPU: 1 PID: 7321 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 95.570942][ T7321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.581413][ T7321] ================================================================== [ 95.589454][ T7321] Kernel panic - not syncing: panic_on_warn set ... [ 95.596031][ T7321] CPU: 1 PID: 7321 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 95.603479][ T7321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.613633][ T7321] Call Trace: [ 95.616916][ T7321] dump_stack+0xf5/0x159 [ 95.621162][ T7321] panic+0x210/0x640 [ 95.625060][ T7321] ? vprintk_func+0x8d/0x140 [ 95.629653][ T7321] kcsan_report.cold+0xc/0x10 [ 95.634409][ T7321] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 95.640031][ T7321] __tsan_write8+0x32/0x40 [ 95.644433][ T7321] handle_mm_fault+0x4a/0x530 [ 95.649105][ T7321] __do_page_fault+0x3fb/0x9e0 [ 95.654337][ T7321] do_page_fault+0x54/0x233 [ 95.658881][ T7321] ? prepare_exit_to_usermode+0x154/0x1a0 [ 95.665379][ T7321] page_fault+0x34/0x40 [ 95.669543][ T7321] RIP: 0033:0x41d194 [ 95.673440][ T7321] Code: 48 83 c6 08 49 83 f8 08 0f 8d e7 00 00 00 48 39 de 0f 83 de 00 00 00 0f ba e2 00 0f 83 ca 00 00 00 4c 8b 4c 24 78 4e 8d 14 0e <4d> 8b 12 4d 85 d2 74 c9 4c 39 d0 77 c4 49 39 ca 73 bf 4c 89 44 24 [ 95.693135][ T7321] RSP: 002b:000000c420051e10 EFLAGS: 00010283 [ 95.699192][ T7321] RAX: 000000c420000000 RBX: 0000000000040000 RCX: 000000c424620000 [ 95.707270][ T7321] RDX: 0000000000000045 RSI: 000000000000a680 RDI: 00007f6b37cdf000 [ 95.715234][ T7321] RBP: 000000c420051e78 R08: 0000000000000000 R09: 000000000176c980 [ 95.723194][ T7321] R10: 0000000001777000 R11: 000000c420051fc0 R12: 0000000000001fa0 [ 95.731248][ T7321] R13: 00000000000000ff R14: 00007f6b37d04000 R15: 0000000000000020 [ 95.740878][ T7321] Kernel Offset: disabled [ 95.745353][ T7321] Rebooting in 86400 seconds..