Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. 2020/02/01 19:27:24 fuzzer started 2020/02/01 19:27:26 dialing manager at 10.128.0.105:40209 2020/02/01 19:27:27 syscalls: 2904 2020/02/01 19:27:27 code coverage: enabled 2020/02/01 19:27:27 comparison tracing: enabled 2020/02/01 19:27:27 extra coverage: enabled 2020/02/01 19:27:27 setuid sandbox: enabled 2020/02/01 19:27:27 namespace sandbox: enabled 2020/02/01 19:27:27 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/01 19:27:27 fault injection: enabled 2020/02/01 19:27:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/01 19:27:27 net packet injection: enabled 2020/02/01 19:27:27 net device setup: enabled 2020/02/01 19:27:27 concurrency sanitizer: enabled 2020/02/01 19:27:27 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 87.459675][ T8102] KCSAN: could not find function: 'poll_schedule_timeout' 2020/02/01 19:27:41 adding functions to KCSAN blacklist: 'sit_tunnel_xmit' '__perf_event_overflow' 'tomoyo_supervisor' '__hrtimer_run_queues' 'alloc_pid' 'pid_update_inode' 'rcu_gp_fqs_loop' '__delete_from_page_cache' 'blk_mq_sched_dispatch_requests' 'mm_update_next_owner' 'taskstats_exit' 'virtqueue_disable_cb' 'schedule_hrtimeout_range_clock' '__d_lookup_done' 'generic_write_end' 'purge_fragmented_blocks_allcpus' 'xas_find_marked' '__snd_rawmidi_transmit_ack' 'commit_echoes' 'generic_fillattr' 'echo_char' 'lruvec_lru_size' 'do_syslog' 'ext4_has_free_clusters' 'tick_do_update_jiffies64' 'generic_permission' 'shmem_add_to_page_cache' 'snd_seq_check_queue' 'd_instantiate_new' '__process_echoes' 'wbt_done' '__writeback_single_inode' 'rcu_gp_fqs_check_wake' 'timer_clear_idle' 'audit_log_start' 'fsnotify' 'snd_timer_pause' 'skb_dequeue' 'file_update_time' 'copy_process' 'wbt_issue' 'blk_mq_dispatch_rq_list' 'queue_access_lock' 'get_cpu_iowait_time_us' 'del_timer' 'tick_sched_do_timer' '__do_munmap' 'kauditd_thread' 'blk_stat_add' 'iput' 'blk_mq_unfreeze_queue' 'do_nanosleep' 'ext4_mb_good_group' 'deadline_remove_request' '__get_user_pages' 'free_pid' 'ep_poll' 'run_timer_softirq' 'padata_find_next' 'poll_schedule_timeout' 'inode_sync_complete' 'find_next_bit' 'xas_clear_mark' 'mod_timer' 'dd_has_work' '__filemap_fdatawrite_range' 'kcm_rcv_strparser' '__mark_inode_dirty' 'exit_signals' 'find_get_pages_range_tag' 'snd_seq_prioq_cell_out' 'vm_area_dup' 'blk_mq_get_request' 'pcpu_alloc' 'blk_mq_run_hw_queue' 'ktime_get_real_seconds' 'tick_nohz_idle_stop_tick' 'n_tty_receive_buf_common' 'ext4_writepages' 'ext4_ext_insert_extent' 'ext4_free_inode' 'ext4_nonda_switch' 'clear_inode' 'futex_wait_queue_me' 'ext4_free_inodes_count' '__ext4_new_inode' '__skb_try_recv_from_queue' 'process_srcu' 'wbt_wait' [ 328.100962][ C1] ================================================================== [ 328.109131][ C1] BUG: KCSAN: data-race in virtnet_poll_tx / virtqueue_add [ 328.116327][ C1] [ 328.118665][ C1] write to 0xffff88821ab3f86c of 4 bytes by interrupt on cpu 0: [ 328.126408][ C1] virtqueue_add+0x958/0x1a80 [ 328.131103][ C1] virtqueue_add_outbuf+0x4b/0x70 [ 328.136141][ C1] start_xmit+0x5b3/0xbe0 [ 328.140495][ C1] dev_hard_start_xmit+0xef/0x430 [ 328.145532][ C1] sch_direct_xmit+0x2b3/0x900 [ 328.150334][ C1] __dev_queue_xmit+0x13e2/0x1ba0 [ 328.155373][ C1] dev_queue_xmit+0x21/0x30 [ 328.159892][ C1] ip_finish_output2+0x89b/0xea0 [ 328.164841][ C1] __ip_finish_output+0x23a/0x490 [ 328.169884][ C1] ip_finish_output+0x41/0x160 [ 328.174698][ C1] ip_output+0xfe/0x230 [ 328.178867][ C1] ip_local_out+0x74/0x90 [ 328.183211][ C1] __ip_queue_xmit+0x3a8/0xa40 [ 328.187987][ C1] ip_queue_xmit+0x45/0x60 [ 328.192420][ C1] __tcp_transmit_skb+0xea3/0x1df0 [ 328.197633][ C1] __tcp_send_ack+0x246/0x300 [ 328.202325][ C1] tcp_send_ack+0x34/0x40 [ 328.206670][ C1] __tcp_ack_snd_check+0xd9/0x580 [ 328.211707][ C1] tcp_rcv_established+0xce9/0xf50 [ 328.217411][ C1] tcp_v4_do_rcv+0x3b5/0x520 [ 328.222026][ C1] tcp_v4_rcv+0x1b2a/0x1d20 [ 328.226695][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 328.232170][ C1] ip_local_deliver_finish+0x110/0x140 [ 328.237654][ C1] ip_local_deliver+0x133/0x210 [ 328.242520][ C1] ip_sublist_rcv_finish+0xf8/0x140 [ 328.247735][ C1] ip_sublist_rcv+0x418/0x550 [ 328.252433][ C1] ip_list_rcv+0x2f5/0x322 [ 328.256871][ C1] __netif_receive_skb_list_core+0x350/0x5c0 [ 328.263006][ C1] netif_receive_skb_list_internal+0x5d8/0x830 [ 328.269275][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 328.274618][ C1] gro_normal_one+0x162/0x170 [ 328.279310][ C1] napi_gro_receive+0x288/0x300 [ 328.284296][ C1] receive_buf+0x284/0x30b0 [ 328.288957][ C1] virtnet_poll+0x436/0x7d0 [ 328.293477][ C1] net_rx_action+0x3ae/0xa90 [ 328.298079][ C1] __do_softirq+0x115/0x33f [ 328.302773][ C1] irq_exit+0xbb/0xe0 [ 328.306763][ C1] do_IRQ+0x81/0x130 [ 328.310680][ C1] ret_from_intr+0x0/0x21 [ 328.315004][ C1] [ 328.317341][ C1] read to 0xffff88821ab3f86c of 4 bytes by interrupt on cpu 1: [ 328.325028][ C1] virtnet_poll_tx+0x177/0x1d0 [ 328.329807][ C1] net_rx_action+0x3ae/0xa90 [ 328.334404][ C1] __do_softirq+0x115/0x33f [ 328.338936][ C1] irq_exit+0xbb/0xe0 [ 328.342929][ C1] do_IRQ+0x81/0x130 [ 328.346840][ C1] ret_from_intr+0x0/0x21 [ 328.351198][ C1] __sanitizer_cov_trace_const_cmp4+0x3/0x20 [ 328.357259][ C1] __vfs_read+0xb1/0xc0 [ 328.361421][ C1] vfs_read+0x143/0x2c0 [ 328.365589][ C1] ksys_read+0x17b/0x1b0 [ 328.369815][ C1] __x64_sys_read+0x4c/0x60 [ 328.374321][ C1] do_syscall_64+0xcc/0x3a0 [ 328.378846][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 328.384860][ C1] [ 328.387200][ C1] Reported by Kernel Concurrency Sanitizer on: [ 328.393412][ C1] CPU: 1 PID: 8103 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0 [ 328.401752][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 328.411833][ C1] ================================================================== [ 328.419978][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 328.426566][ C1] CPU: 1 PID: 8103 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0 [ 328.434789][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 328.444836][ C1] Call Trace: [ 328.448102][ C1] [ 328.450948][ C1] dump_stack+0x11d/0x181 [ 328.455262][ C1] panic+0x210/0x640 [ 328.459174][ C1] ? vprintk_func+0x8d/0x140 [ 328.463756][ C1] kcsan_report.cold+0xc/0xd [ 328.468413][ C1] kcsan_setup_watchpoint+0x3fe/0x460 [ 328.473919][ C1] __tsan_read4+0xc6/0x100 [ 328.478324][ C1] virtnet_poll_tx+0x177/0x1d0 [ 328.483150][ C1] net_rx_action+0x3ae/0xa90 [ 328.487759][ C1] __do_softirq+0x115/0x33f [ 328.492261][ C1] irq_exit+0xbb/0xe0 [ 328.496246][ C1] do_IRQ+0x81/0x130 [ 328.500657][ C1] common_interrupt+0xf/0xf [ 328.505185][ C1] [ 328.508133][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x3/0x20 [ 328.514896][ C1] Code: ff 5d c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 00 00 48 89 e5 48 8b 4d 08 e8 d8 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 <89> fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 ba fe ff ff 5d c3 0f [ 328.534987][ C1] RSP: 0018:ffffc9000163bd48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 [ 328.543399][ C1] RAX: ffff8881251e36c0 RBX: ffff88811e598100 RCX: ffffffff862525f0 [ 328.551363][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 328.559439][ C1] RBP: ffffc9000163be00 R08: 0000000000000000 R09: 00008881251e36cc [ 328.567495][ C1] R10: 0000c9000163bd70 R11: 00008881251e36cf R12: 0000000000000802 [ 328.575577][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001000 [ 328.583813][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 328.590057][ C1] ? new_sync_read+0x458/0x4f0 [ 328.594811][ C1] ? security_file_permission+0x88/0x280 [ 328.600465][ C1] __vfs_read+0xb1/0xc0 [ 328.604818][ C1] vfs_read+0x143/0x2c0 [ 328.608998][ C1] ksys_read+0x17b/0x1b0 [ 328.613245][ C1] __x64_sys_read+0x4c/0x60 [ 328.617738][ C1] do_syscall_64+0xcc/0x3a0 [ 328.622296][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 328.628359][ C1] RIP: 0033:0x47c530 [ 328.632253][ C1] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 328.651937][ C1] RSP: 002b:000000c4203458b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 328.660370][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 328.668712][ C1] RDX: 0000000000001000 RSI: 000000c420212000 RDI: 0000000000000003 [ 328.676679][ C1] RBP: 000000c420345910 R08: 0000000000000000 R09: 0000000000000000 [ 328.684648][ C1] R10: 0000000000000000 R11: 0000000000000212 R12: 000000c442aa4038 [ 328.692615][ C1] R13: 0000000000000007 R14: 0000000000c90c60 R15: 000000000000bb06 [ 328.702482][ C1] Kernel Offset: disabled [ 328.707098][ C1] Rebooting in 86400 seconds..