[info] Using makefile-style concurrent boot in runlevel 2. [ 66.719569][ T27] audit: type=1800 audit(1580183078.426:21): pid=7867 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 66.776741][ T27] audit: type=1800 audit(1580183078.426:22): pid=7867 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[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. 2020/01/28 03:44:47 fuzzer started 2020/01/28 03:44:50 dialing manager at 10.128.0.105:43309 2020/01/28 03:44:50 syscalls: 2893 2020/01/28 03:44:50 code coverage: enabled 2020/01/28 03:44:50 comparison tracing: enabled 2020/01/28 03:44:50 extra coverage: enabled 2020/01/28 03:44:50 setuid sandbox: enabled 2020/01/28 03:44:50 namespace sandbox: enabled 2020/01/28 03:44:50 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/28 03:44:50 fault injection: enabled 2020/01/28 03:44:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/28 03:44:50 net packet injection: enabled 2020/01/28 03:44:50 net device setup: enabled 2020/01/28 03:44:50 concurrency sanitizer: enabled 2020/01/28 03:44:50 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 86.050369][ T8032] KCSAN: could not find function: 'poll_schedule_timeout' 2020/01/28 03:45:03 adding functions to KCSAN blacklist: 'wbt_issue' 'batadv_tt_local_add' '__mark_inode_dirty' 'shmem_add_to_page_cache' 'mod_timer' 'wbt_done' 'fasync_remove_entry' 'tick_sched_do_timer' 'ktime_get_seconds' 'tomoyo_supervisor' 'generic_permission' 'xas_find_marked' 'blk_mq_run_hw_queue' 'tomoyo_check_acl' 'evict' 'generic_file_read_iter' 'lru_add_drain_all' 'ext4_mb_good_group' 'snd_seq_check_queue' 'blk_mq_dispatch_rq_list' 'blk_mq_get_request' 'do_dentry_open' 'generic_fillattr' 'j1939_xtp_rx_dat_one' 'bio_endio' 'shmem_getpage_gfp' 'ext4_free_inode' 'ep_poll' 'tick_do_update_jiffies64' 'sbitmap_queue_clear' 'do_exit' 'audit_log_start' 'ext4_mark_iloc_dirty' 'dd_has_work' 'other_inode_match' 'ext4_sync_file' 'wbt_wait' 'pid_update_inode' 'do_nanosleep' 'generic_write_end' 'process_srcu' 'ktime_get_real_seconds' 'do_signal_stop' 'poll_schedule_timeout' 'shmem_file_read_iter' 'find_next_bit' 'rcu_gp_fqs_check_wake' 'ext4_free_inodes_count' 'sit_tunnel_xmit' 'mm_update_next_owner' 'inotify_handle_event' 'ext4_has_free_clusters' '__snd_rawmidi_transmit_ack' 'get_cpu_idle_time_us' 'wbc_detach_inode' '__delete_from_page_cache' 'tick_nohz_idle_stop_tick' 'file_update_time' 'copy_process' 'virtqueue_enable_cb_delayed' 'echo_char' 'lruvec_lru_size' '__hrtimer_run_queues' 'kauditd_thread' 'vm_area_dup' 'ext4_nonda_switch' 'do_syslog' 'run_timer_softirq' 'timer_clear_idle' 'n_tty_receive_buf_common' 'yama_ptracer_del' 'pcpu_alloc' 'taskstats_exit' 'blk_mq_sched_dispatch_requests' '__dentry_kill' 'kernfs_refresh_inode' 'find_get_pages_range_tag' 'alloc_pid' '__add_to_page_cache_locked' 'bio_chain' 'ext4_writepages' 'ondemand_readahead' 'futex_wait_queue_me' 'add_timer' 'xas_clear_mark' '__filemap_fdatawrite_range' 'atime_needs_update' 'queue_access_lock' '__ext4_new_inode' 'skb_dequeue' 'install_new_memslots' 'iomap_dio_bio_actor' [ 323.390884][ C0] ================================================================== [ 323.399215][ C0] BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_get_buf_ctx [ 323.407648][ C0] [ 323.409984][ C0] read to 0xffff88812af7f4f0 of 2 bytes by interrupt on cpu 1: [ 323.417636][ C0] virtqueue_get_buf_ctx+0x4da/0x5c0 [ 323.422969][ C0] virtqueue_get_buf+0x29/0x40 [ 323.427738][ C0] free_old_xmit_skbs+0x9e/0x170 [ 323.432672][ C0] start_xmit+0xd3/0xbe0 [ 323.437041][ C0] dev_hard_start_xmit+0xef/0x430 [ 323.442261][ C0] sch_direct_xmit+0x2b3/0x900 [ 323.447018][ C0] __dev_queue_xmit+0x13e2/0x1ba0 [ 323.452048][ C0] dev_queue_xmit+0x21/0x30 [ 323.456669][ C0] ip_finish_output2+0x89b/0xea0 [ 323.461623][ C0] __ip_finish_output+0x23a/0x490 [ 323.466668][ C0] ip_finish_output+0x41/0x160 [ 323.471436][ C0] ip_output+0xfe/0x230 [ 323.475597][ C0] ip_local_out+0x74/0x90 [ 323.479972][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 323.484884][ C0] ip_queue_xmit+0x45/0x60 [ 323.489310][ C0] __tcp_transmit_skb+0xea3/0x1df0 [ 323.494427][ C0] __tcp_send_ack+0x246/0x300 [ 323.499227][ C0] tcp_send_ack+0x34/0x40 [ 323.503751][ C0] __tcp_ack_snd_check+0xd9/0x580 [ 323.508818][ C0] tcp_rcv_established+0xce9/0xf50 [ 323.514032][ C0] tcp_v4_do_rcv+0x3b5/0x520 [ 323.518721][ C0] tcp_v4_rcv+0x1b2a/0x1d20 [ 323.523223][ C0] ip_protocol_deliver_rcu+0x4d/0x420 [ 323.529209][ C0] ip_local_deliver_finish+0x110/0x140 [ 323.534688][ C0] ip_local_deliver+0x133/0x210 [ 323.539648][ C0] ip_sublist_rcv_finish+0xf8/0x140 [ 323.544907][ C0] ip_sublist_rcv+0x418/0x550 [ 323.549587][ C0] ip_list_rcv+0x2f5/0x322 [ 323.554010][ C0] __netif_receive_skb_list_core+0x350/0x5c0 [ 323.560725][ C0] netif_receive_skb_list_internal+0x5d8/0x830 [ 323.567003][ C0] gro_normal_list.part.0+0x3a/0xb0 [ 323.572322][ C0] gro_normal_one+0x162/0x170 [ 323.577003][ C0] napi_gro_receive+0x288/0x300 [ 323.581933][ C0] receive_buf+0x284/0x30b0 [ 323.586559][ C0] virtnet_poll+0x436/0x7d0 [ 323.591200][ C0] net_rx_action+0x3ae/0xa90 [ 323.595909][ C0] __do_softirq+0x115/0x33f [ 323.600425][ C0] irq_exit+0xbb/0xe0 [ 323.604410][ C0] do_IRQ+0x81/0x130 [ 323.608326][ C0] ret_from_intr+0x0/0x21 [ 323.612694][ C0] native_safe_halt+0xe/0x10 [ 323.617291][ C0] arch_cpu_idle+0xa/0x10 [ 323.621729][ C0] default_idle_call+0x1e/0x40 [ 323.626720][ C0] do_idle+0x1c2/0x290 [ 323.630807][ C0] cpu_startup_entry+0x1b/0x20 [ 323.635689][ C0] start_secondary+0x168/0x1b0 [ 323.640455][ C0] secondary_startup_64+0xa4/0xb0 [ 323.645487][ C0] [ 323.647932][ C0] write to 0xffff88812af7f4f0 of 2 bytes by interrupt on cpu 0: [ 323.655553][ C0] virtqueue_disable_cb+0xe9/0x130 [ 323.660676][ C0] skb_xmit_done+0x6a/0x110 [ 323.665188][ C0] vring_interrupt+0x1a1/0x1c0 [ 323.670075][ C0] __handle_irq_event_percpu+0x9a/0x430 [ 323.675640][ C0] handle_irq_event_percpu+0x4b/0xe0 [ 323.681032][ C0] handle_irq_event+0x85/0xca [ 323.685721][ C0] handle_edge_irq+0x1a4/0x4a0 [ 323.690644][ C0] do_IRQ+0x7c/0x130 [ 323.694651][ C0] ret_from_intr+0x0/0x21 [ 323.698989][ C0] native_safe_halt+0xe/0x10 [ 323.703586][ C0] arch_cpu_idle+0xa/0x10 [ 323.707911][ C0] default_idle_call+0x1e/0x40 [ 323.712672][ C0] do_idle+0x1c2/0x290 [ 323.716785][ C0] cpu_startup_entry+0x1b/0x20 [ 323.721545][ C0] rest_init+0xec/0xf6 [ 323.725692][ C0] arch_call_rest_init+0x17/0x37 [ 323.731361][ C0] start_kernel+0x838/0x85e [ 323.735881][ C0] x86_64_start_reservations+0x29/0x2b [ 323.741347][ C0] x86_64_start_kernel+0x72/0x76 [ 323.746299][ C0] secondary_startup_64+0xa4/0xb0 [ 323.751528][ C0] [ 323.753856][ C0] Reported by Kernel Concurrency Sanitizer on: [ 323.760139][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 323.768134][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 323.778384][ C0] ================================================================== [ 323.786444][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 323.793033][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 323.800924][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 323.811015][ C0] Call Trace: [ 323.814316][ C0] [ 323.817336][ C0] dump_stack+0x11d/0x181 [ 323.821786][ C0] panic+0x210/0x640 [ 323.825694][ C0] ? vprintk_func+0x8d/0x140 [ 323.830305][ C0] kcsan_report.cold+0xc/0xd [ 323.834908][ C0] kcsan_setup_watchpoint+0x3fe/0x460 [ 323.840317][ C0] __tsan_unaligned_write2+0xc7/0x110 [ 323.845700][ C0] virtqueue_disable_cb+0xe9/0x130 [ 323.850829][ C0] skb_xmit_done+0x6a/0x110 [ 323.855325][ C0] ? virtnet_poll_tx+0x1d0/0x1d0 [ 323.860255][ C0] vring_interrupt+0x1a1/0x1c0 [ 323.865026][ C0] ? virtqueue_enable_cb+0x40/0x40 [ 323.870168][ C0] __handle_irq_event_percpu+0x9a/0x430 [ 323.875727][ C0] handle_irq_event_percpu+0x4b/0xe0 [ 323.881016][ C0] handle_irq_event+0x85/0xca [ 323.885839][ C0] handle_edge_irq+0x1a4/0x4a0 [ 323.890748][ C0] do_IRQ+0x7c/0x130 [ 323.894690][ C0] common_interrupt+0xf/0xf [ 323.899340][ C0] [ 323.902289][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 323.907787][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 4c e6 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 3c e6 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 d2 57 91 fc e8 fd da ab fd 0f [ 323.927509][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd6 [ 323.936967][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55 [ 323.944939][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005 [ 323.952920][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160 [ 323.960902][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000 [ 323.968883][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000 [ 323.976871][ C0] ? debug_smp_processor_id+0x35/0x137 [ 323.982490][ C0] ? debug_smp_processor_id+0x3e/0x137 [ 323.987959][ C0] ? default_idle+0x26/0x180 [ 323.992548][ C0] arch_cpu_idle+0xa/0x10 [ 323.996887][ C0] default_idle_call+0x1e/0x40 [ 324.001654][ C0] do_idle+0x1c2/0x290 [ 324.005753][ C0] cpu_startup_entry+0x1b/0x20 [ 324.010546][ C0] rest_init+0xec/0xf6 [ 324.014637][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 324.021853][ C0] arch_call_rest_init+0x17/0x37 [ 324.026807][ C0] start_kernel+0x838/0x85e [ 324.031352][ C0] x86_64_start_reservations+0x29/0x2b [ 324.036818][ C0] x86_64_start_kernel+0x72/0x76 [ 324.041809][ C0] secondary_startup_64+0xa4/0xb0 [ 324.048346][ C0] Kernel Offset: disabled [ 324.052698][ C0] Rebooting in 86400 seconds..