[info] Using makefile-style concurrent boot in runlevel 2. [ 42.883652][ T26] audit: type=1800 audit(1574982695.871:21): pid=7452 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 42.935543][ T26] audit: type=1800 audit(1574982695.871:22): pid=7452 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 '10.128.0.7' (ECDSA) to the list of known hosts. 2019/11/28 23:11:46 fuzzer started 2019/11/28 23:11:47 dialing manager at 10.128.0.105:46851 2019/11/28 23:11:50 syscalls: 2589 2019/11/28 23:11:50 code coverage: enabled 2019/11/28 23:11:50 comparison tracing: enabled 2019/11/28 23:11:50 extra coverage: extra coverage is not supported by the kernel 2019/11/28 23:11:50 setuid sandbox: enabled 2019/11/28 23:11:50 namespace sandbox: enabled 2019/11/28 23:11:50 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/28 23:11:50 fault injection: enabled 2019/11/28 23:11:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/28 23:11:50 net packet injection: enabled 2019/11/28 23:11:50 net device setup: enabled 2019/11/28 23:11:50 concurrency sanitizer: enabled 2019/11/28 23:11:50 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 59.666682][ T7621] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/28 23:11:56 adding functions to KCSAN blacklist: 'ext4_has_free_clusters' 'pid_update_inode' 'ext4_free_inodes_count' 'wbt_done' 'ext4_free_inode' 'timer_clear_idle' 'futex_wait_queue_me' 'ep_poll' 'wbt_issue' 'taskstats_exit' 'blk_mq_run_hw_queue' 'generic_write_end' '__ext4_new_inode' 'blk_mq_get_request' 'tick_sched_do_timer' 'fat16_ent_put' 'blk_mq_sched_dispatch_requests' 'poll_schedule_timeout' 'process_srcu' 'xas_clear_mark' 'ip_finish_output2' 'sctp_assoc_migrate' 'tomoyo_supervisor' 'tcp_add_backlog' 'find_next_bit' 'rcu_gp_fqs_loop' 'mm_update_next_owner' 'ext4_nonda_switch' '__hrtimer_run_queues' 'pipe_poll' 'vm_area_dup' 'find_get_pages_range_tag' 'kauditd_thread' 'blk_mq_dispatch_rq_list' 'common_perm_cond' 'tick_do_update_jiffies64' 'run_timer_softirq' 'page_counter_try_charge' 'rcu_gp_fqs_check_wake' [ 98.226528][ C0] ================================================================== [ 98.234881][ C0] BUG: KCSAN: data-race in virtqueue_enable_cb_delayed / virtqueue_enable_cb_prepare [ 98.244335][ C0] [ 98.246663][ C0] read to 0xffff88821b1adc70 of 2 bytes by interrupt on cpu 1: [ 98.254225][ C0] virtqueue_enable_cb_delayed+0x1dc/0x4d0 [ 98.260237][ C0] start_xmit+0xb0f/0xbe0 [ 98.264566][ C0] dev_hard_start_xmit+0xef/0x430 [ 98.269595][ C0] sch_direct_xmit+0x2b3/0x900 [ 98.274358][ C0] __dev_queue_xmit+0x19a3/0x1b40 [ 98.279386][ C0] dev_queue_xmit+0x21/0x30 [ 98.284001][ C0] ip_finish_output2+0x836/0xe40 [ 98.288932][ C0] __ip_finish_output+0x23a/0x490 [ 98.293944][ C0] ip_finish_output+0x41/0x160 [ 98.298697][ C0] ip_output+0xdf/0x210 [ 98.302844][ C0] ip_local_out+0x74/0x90 [ 98.307184][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 98.311953][ C0] ip_queue_xmit+0x45/0x60 [ 98.316372][ C0] __tcp_transmit_skb+0xe81/0x1d60 [ 98.321584][ C0] __tcp_send_ack+0x246/0x300 [ 98.326281][ C0] tcp_send_ack+0x34/0x40 [ 98.330625][ C0] __tcp_ack_snd_check+0xd9/0x4f0 [ 98.335663][ C0] tcp_rcv_established+0xce9/0xf50 [ 98.340774][ C0] tcp_v4_do_rcv+0x3b5/0x520 [ 98.345353][ C0] tcp_v4_rcv+0x19ec/0x1bd0 [ 98.349858][ C0] ip_protocol_deliver_rcu+0x4d/0x420 [ 98.355246][ C0] ip_local_deliver_finish+0x110/0x140 [ 98.360783][ C0] ip_local_deliver+0x133/0x210 [ 98.365628][ C0] ip_rcv_finish+0x121/0x160 [ 98.370260][ C0] ip_rcv+0x18f/0x1a0 [ 98.374328][ C0] __netif_receive_skb_one_core+0xa7/0xe0 [ 98.380069][ C0] __netif_receive_skb+0x37/0xf0 [ 98.385035][ C0] netif_receive_skb_internal+0x59/0x190 [ 98.390677][ C0] napi_gro_receive+0x28f/0x330 [ 98.395537][ C0] receive_buf+0x284/0x30b0 [ 98.400238][ C0] virtnet_poll+0x436/0x7d0 [ 98.404736][ C0] net_rx_action+0x3ae/0xa90 [ 98.409317][ C0] __do_softirq+0x115/0x33f [ 98.413803][ C0] irq_exit+0xbb/0xe0 [ 98.417773][ C0] do_IRQ+0x81/0x130 [ 98.421730][ C0] ret_from_intr+0x0/0x19 [ 98.426088][ C0] native_safe_halt+0xe/0x10 [ 98.430692][ C0] arch_cpu_idle+0xa/0x10 [ 98.435030][ C0] default_idle_call+0x1e/0x40 [ 98.439797][ C0] do_idle+0x1af/0x280 [ 98.443856][ C0] cpu_startup_entry+0x1b/0x20 [ 98.448637][ C0] start_secondary+0x168/0x1b0 [ 98.453393][ C0] secondary_startup_64+0xa4/0xb0 [ 98.458398][ C0] [ 98.460755][ C0] write to 0xffff88821b1adc70 of 2 bytes by interrupt on cpu 0: [ 98.468402][ C0] virtqueue_enable_cb_prepare+0x1ce/0x2b0 [ 98.474230][ C0] virtqueue_napi_complete+0x2c/0xa0 [ 98.479514][ C0] virtnet_poll_tx+0x15f/0x1d0 [ 98.484283][ C0] net_rx_action+0x3ae/0xa90 [ 98.488890][ C0] __do_softirq+0x115/0x33f [ 98.493400][ C0] irq_exit+0xbb/0xe0 [ 98.497383][ C0] do_IRQ+0x81/0x130 [ 98.501352][ C0] ret_from_intr+0x0/0x19 [ 98.505702][ C0] native_safe_halt+0xe/0x10 [ 98.510291][ C0] arch_cpu_idle+0xa/0x10 [ 98.514620][ C0] default_idle_call+0x1e/0x40 [ 98.519388][ C0] do_idle+0x1af/0x280 [ 98.523467][ C0] cpu_startup_entry+0x1b/0x20 [ 98.528227][ C0] rest_init+0xec/0xf6 [ 98.532285][ C0] arch_call_rest_init+0x17/0x37 [ 98.537227][ C0] start_kernel+0x838/0x85e [ 98.541732][ C0] x86_64_start_reservations+0x29/0x2b [ 98.547190][ C0] x86_64_start_kernel+0x72/0x76 [ 98.552119][ C0] secondary_startup_64+0xa4/0xb0 [ 98.558177][ C0] [ 98.560497][ C0] Reported by Kernel Concurrency Sanitizer on: [ 98.566660][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0 [ 98.574205][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.584263][ C0] ================================================================== [ 98.592495][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 98.599177][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0 [ 98.606704][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.616754][ C0] Call Trace: [ 98.620038][ C0] [ 98.622891][ C0] dump_stack+0x11d/0x181 [ 98.627220][ C0] panic+0x210/0x640 [ 98.631115][ C0] ? vprintk_func+0x8d/0x140 [ 98.635740][ C0] kcsan_report.cold+0xc/0xd [ 98.640351][ C0] kcsan_setup_watchpoint+0x3fe/0x460 [ 98.645733][ C0] __tsan_unaligned_write2+0xc4/0x100 [ 98.651108][ C0] virtqueue_enable_cb_prepare+0x1ce/0x2b0 [ 98.656947][ C0] virtqueue_napi_complete+0x2c/0xa0 [ 98.662232][ C0] virtnet_poll_tx+0x15f/0x1d0 [ 98.667009][ C0] net_rx_action+0x3ae/0xa90 [ 98.671639][ C0] __do_softirq+0x115/0x33f [ 98.676183][ C0] irq_exit+0xbb/0xe0 [ 98.680283][ C0] do_IRQ+0x81/0x130 [ 98.684195][ C0] common_interrupt+0xf/0xf [ 98.688910][ C0] [ 98.691849][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 98.697517][ C0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 7c ad 48 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 6c ad 48 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 42 6d 9f fc e8 7d 1a b5 fd 0f [ 98.717120][ C0] RSP: 0018:ffffffff85a03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd6 [ 98.725559][ C0] RAX: 0000000000000000 RBX: ffffffff85a2b780 RCX: ffffffff824ee309 [ 98.733523][ C0] RDX: 0000000000000000 RSI: ffffffff824ee317 RDI: 0000000000000005 [ 98.741489][ C0] RBP: ffffffff85a03e18 R08: ffffffff85a2b780 R09: 0000ffff857d2160 [ 98.749455][ C0] R10: 0000ffff85a03cf0 R11: 0000ffff857d2167 R12: 0000000000000000 [ 98.757418][ C0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000 [ 98.765445][ C0] ? debug_smp_processor_id+0x39/0x172 [ 98.770924][ C0] ? debug_smp_processor_id+0x47/0x172 [ 98.776417][ C0] ? default_idle+0x26/0x180 [ 98.781018][ C0] arch_cpu_idle+0xa/0x10 [ 98.785498][ C0] default_idle_call+0x1e/0x40 [ 98.790423][ C0] do_idle+0x1af/0x280 [ 98.794509][ C0] ? do_idle+0xe7/0x280 [ 98.798678][ C0] cpu_startup_entry+0x1b/0x20 [ 98.803449][ C0] rest_init+0xec/0xf6 [ 98.807524][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 98.814728][ C0] arch_call_rest_init+0x17/0x37 [ 98.819779][ C0] start_kernel+0x838/0x85e [ 98.824284][ C0] x86_64_start_reservations+0x29/0x2b [ 98.829750][ C0] x86_64_start_kernel+0x72/0x76 [ 98.834706][ C0] secondary_startup_64+0xa4/0xb0 [ 98.841274][ C0] Kernel Offset: disabled [ 98.845617][ C0] Rebooting in 86400 seconds..