[info] Using makefile-style concurrent boot in runlevel 2. [ 48.096325][ T27] audit: type=1800 audit(1576206948.758:21): pid=7665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 48.126715][ T27] audit: type=1800 audit(1576206948.768:22): pid=7665 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 '10.128.1.30' (ECDSA) to the list of known hosts. 2019/12/13 03:15:59 fuzzer started 2019/12/13 03:16:01 dialing manager at 10.128.0.105:37595 2019/12/13 03:16:01 syscalls: 2686 2019/12/13 03:16:01 code coverage: enabled 2019/12/13 03:16:01 comparison tracing: enabled 2019/12/13 03:16:01 extra coverage: enabled 2019/12/13 03:16:01 setuid sandbox: enabled 2019/12/13 03:16:01 namespace sandbox: enabled 2019/12/13 03:16:01 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/13 03:16:01 fault injection: enabled 2019/12/13 03:16:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/13 03:16:01 net packet injection: enabled 2019/12/13 03:16:01 net device setup: enabled 2019/12/13 03:16:01 concurrency sanitizer: enabled 2019/12/13 03:16:01 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 66.521875][ T7830] KCSAN: could not find function: 'poll_schedule_timeout' 2019/12/13 03:16:07 adding functions to KCSAN blacklist: 'ep_poll' 'tick_sched_do_timer' 'ext4_nonda_switch' 'kauditd_thread' 'futex_wait_queue_me' 'page_counter_try_charge' 'timer_clear_idle' '__ext4_new_inode' 'tick_do_update_jiffies64' 'tick_nohz_idle_stop_tick' 'ext4_has_free_clusters' 'copy_process' 'do_exit' 'wbt_issue' 'blk_stat_add' 'pcpu_alloc' 'generic_write_end' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'ext4_free_inode' 'vm_area_dup' 'ktime_get_real_seconds' 'ext4_mb_good_group' '__mark_inode_dirty' 'tomoyo_supervisor' 'do_nanosleep' 'echo_char' 'smpboot_thread_fn' 'find_next_bit' 'alloc_empty_file' 'mod_timer' 'ext4_free_inodes_count' 'do_syslog' 'do_try_to_free_pages' 'taskstats_exit' 'rcu_gp_fqs_check_wake' 'dd_has_work' 'blk_mq_sched_dispatch_requests' '__hrtimer_run_queues' 'add_timer' 'pid_update_inode' 'run_timer_softirq' 'poll_schedule_timeout' 'xas_find_marked' [ 124.629968][ C0] ================================================================== [ 124.638328][ C0] BUG: KCSAN: data-race in virtqueue_enable_cb_delayed / virtqueue_enable_cb_prepare [ 124.649006][ C0] [ 124.651346][ C0] read to 0xffff888129016370 of 2 bytes by interrupt on cpu 1: [ 124.658985][ C0] virtqueue_enable_cb_delayed+0x1dc/0x4d0 [ 124.665029][ C0] start_xmit+0xb0f/0xbe0 [ 124.669367][ C0] dev_hard_start_xmit+0xef/0x430 [ 124.674411][ C0] sch_direct_xmit+0x2b3/0x900 [ 124.679180][ C0] __dev_queue_xmit+0x13e2/0x1ba0 [ 124.684297][ C0] dev_queue_xmit+0x21/0x30 [ 124.688833][ C0] ip_finish_output2+0x89b/0xea0 [ 124.693772][ C0] __ip_finish_output+0x23a/0x490 [ 124.698977][ C0] ip_finish_output+0x41/0x160 [ 124.703759][ C0] ip_output+0xfe/0x230 [ 124.708188][ C0] ip_local_out+0x74/0x90 [ 124.712634][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 124.718106][ C0] ip_queue_xmit+0x45/0x60 [ 124.722620][ C0] __tcp_transmit_skb+0xea3/0x1df0 [ 124.727729][ C0] __tcp_send_ack+0x246/0x300 [ 124.732406][ C0] tcp_send_ack+0x34/0x40 [ 124.736867][ C0] __tcp_ack_snd_check+0xd9/0x580 [ 124.742523][ C0] tcp_rcv_established+0xce9/0xf50 [ 124.747659][ C0] tcp_v4_do_rcv+0x3b5/0x520 [ 124.752451][ C0] tcp_v4_rcv+0x1b2a/0x1d20 [ 124.757112][ C0] ip_protocol_deliver_rcu+0x4d/0x420 [ 124.763171][ C0] ip_local_deliver_finish+0x110/0x140 [ 124.768976][ C0] ip_local_deliver+0x133/0x210 [ 124.773845][ C0] ip_sublist_rcv_finish+0xf8/0x140 [ 124.779072][ C0] ip_sublist_rcv+0x418/0x550 [ 124.783756][ C0] ip_list_rcv+0x2f5/0x322 [ 124.788180][ C0] __netif_receive_skb_list_core+0x350/0x5c0 [ 124.794164][ C0] netif_receive_skb_list_internal+0x5d8/0x830 [ 124.800430][ C0] gro_normal_list.part.0+0x3a/0xb0 [ 124.805733][ C0] gro_normal_one+0x162/0x170 [ 124.810766][ C0] napi_gro_receive+0x288/0x300 [ 124.815638][ C0] receive_buf+0x284/0x30b0 [ 124.820149][ C0] virtnet_poll+0x436/0x7d0 [ 124.824683][ C0] net_rx_action+0x3ae/0xa90 [ 124.829268][ C0] __do_softirq+0x115/0x33f [ 124.833787][ C0] irq_exit+0xbb/0xe0 [ 124.837792][ C0] do_IRQ+0x81/0x130 [ 124.841800][ C0] ret_from_intr+0x0/0x21 [ 124.846145][ C0] native_safe_halt+0xe/0x10 [ 124.850946][ C0] arch_cpu_idle+0xa/0x10 [ 124.855540][ C0] default_idle_call+0x1e/0x40 [ 124.860489][ C0] do_idle+0x1c2/0x290 [ 124.864572][ C0] cpu_startup_entry+0x1b/0x20 [ 124.869349][ C0] start_secondary+0x168/0x1b0 [ 124.874125][ C0] secondary_startup_64+0xa4/0xb0 [ 124.879136][ C0] [ 124.881473][ C0] write to 0xffff888129016370 of 2 bytes by interrupt on cpu 0: [ 124.889244][ C0] virtqueue_enable_cb_prepare+0x1ce/0x2b0 [ 124.895061][ C0] virtqueue_napi_complete+0x2c/0xa0 [ 124.900364][ C0] virtnet_poll_tx+0x15f/0x1d0 [ 124.905147][ C0] net_rx_action+0x3ae/0xa90 [ 124.909973][ C0] __do_softirq+0x115/0x33f [ 124.914510][ C0] irq_exit+0xbb/0xe0 [ 124.918492][ C0] do_IRQ+0x81/0x130 [ 124.922520][ C0] ret_from_intr+0x0/0x21 [ 124.926957][ C0] native_safe_halt+0xe/0x10 [ 124.931559][ C0] arch_cpu_idle+0xa/0x10 [ 124.935904][ C0] default_idle_call+0x1e/0x40 [ 124.940668][ C0] do_idle+0x1c2/0x290 [ 124.945100][ C0] cpu_startup_entry+0x1b/0x20 [ 124.949869][ C0] rest_init+0xec/0xf6 [ 124.954044][ C0] arch_call_rest_init+0x17/0x37 [ 124.959012][ C0] start_kernel+0x838/0x85e [ 124.963626][ C0] x86_64_start_reservations+0x29/0x2b [ 124.969078][ C0] x86_64_start_kernel+0x72/0x76 [ 124.974175][ C0] secondary_startup_64+0xa4/0xb0 [ 124.979188][ C0] [ 124.981503][ C0] Reported by Kernel Concurrency Sanitizer on: [ 124.987849][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 124.995927][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.005990][ C0] ================================================================== [ 125.014062][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 125.020870][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 125.028868][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.038944][ C0] Call Trace: [ 125.042496][ C0] [ 125.045349][ C0] dump_stack+0x11d/0x181 [ 125.049733][ C0] panic+0x210/0x640 [ 125.053669][ C0] ? vprintk_func+0x8d/0x140 [ 125.058270][ C0] kcsan_report.cold+0xc/0xd [ 125.062914][ C0] kcsan_setup_watchpoint+0x3fe/0x460 [ 125.068386][ C0] __tsan_unaligned_write2+0xc7/0x110 [ 125.073756][ C0] virtqueue_enable_cb_prepare+0x1ce/0x2b0 [ 125.079569][ C0] virtqueue_napi_complete+0x2c/0xa0 [ 125.084847][ C0] virtnet_poll_tx+0x15f/0x1d0 [ 125.089606][ C0] net_rx_action+0x3ae/0xa90 [ 125.094210][ C0] __do_softirq+0x115/0x33f [ 125.098725][ C0] irq_exit+0xbb/0xe0 [ 125.102812][ C0] do_IRQ+0x81/0x130 [ 125.106957][ C0] common_interrupt+0xf/0xf [ 125.111470][ C0] [ 125.114512][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 125.119951][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 4c b6 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 3c b6 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 22 2b 91 fc e8 3d ae ab fd 0f [ 125.139939][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd6 [ 125.148499][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546f95 [ 125.156672][ C0] RDX: 0000000000000000 RSI: ffffffff82546f9e RDI: 0000000000000005 [ 125.165461][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2f160 [ 125.173700][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2f167 R12: 0000000000000000 [ 125.182130][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000 [ 125.190266][ C0] ? debug_smp_processor_id+0x35/0x137 [ 125.195937][ C0] ? debug_smp_processor_id+0x3e/0x137 [ 125.202816][ C0] ? default_idle+0x26/0x180 [ 125.207406][ C0] arch_cpu_idle+0xa/0x10 [ 125.211776][ C0] default_idle_call+0x1e/0x40 [ 125.216562][ C0] do_idle+0x1c2/0x290 [ 125.220633][ C0] cpu_startup_entry+0x1b/0x20 [ 125.225463][ C0] rest_init+0xec/0xf6 [ 125.230454][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 125.237830][ C0] arch_call_rest_init+0x17/0x37 [ 125.242889][ C0] start_kernel+0x838/0x85e [ 125.247550][ C0] x86_64_start_reservations+0x29/0x2b [ 125.253390][ C0] x86_64_start_kernel+0x72/0x76 [ 125.258428][ C0] secondary_startup_64+0xa4/0xb0 [ 125.265208][ C0] Kernel Offset: disabled [ 125.269713][ C0] Rebooting in 86400 seconds..