[info] Using makefile-style concurrent boot in runlevel 2. [ 47.926356][ T26] audit: type=1800 audit(1580037623.713:21): pid=7825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 47.987645][ T26] audit: type=1800 audit(1580037623.723:22): pid=7825 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 '10.128.0.50' (ECDSA) to the list of known hosts. 2020/01/26 11:20:36 fuzzer started 2020/01/26 11:20:38 dialing manager at 10.128.0.105:37311 2020/01/26 11:20:38 syscalls: 2893 2020/01/26 11:20:38 code coverage: enabled 2020/01/26 11:20:38 comparison tracing: enabled 2020/01/26 11:20:38 extra coverage: enabled 2020/01/26 11:20:38 setuid sandbox: enabled 2020/01/26 11:20:38 namespace sandbox: enabled 2020/01/26 11:20:38 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/26 11:20:38 fault injection: enabled 2020/01/26 11:20:38 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/26 11:20:38 net packet injection: enabled 2020/01/26 11:20:38 net device setup: enabled 2020/01/26 11:20:38 concurrency sanitizer: enabled 2020/01/26 11:20:38 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 76.681872][ T7997] KCSAN: could not find function: 'poll_schedule_timeout' 2020/01/26 11:20:53 adding functions to KCSAN blacklist: 'process_srcu' 'snd_seq_check_queue' 'do_exit' 'virtqueue_enable_cb_delayed' 'atime_needs_update' 'ip_tunnel_xmit' 'wbt_wait' 'tick_nohz_idle_stop_tick' 'copy_process' 'shmem_add_to_page_cache' 'ext4_mb_good_group' '__mark_inode_dirty' 'wbc_detach_inode' 'tick_sched_do_timer' 'tomoyo_supervisor' 'ext4_nonda_switch' 'ktime_get_real_seconds' 'vti_tunnel_xmit' 'sit_tunnel_xmit' 'delete_from_page_cache_batch' '__filemap_fdatawrite_range' '__hrtimer_run_queues' 'other_inode_match' 'ondemand_readahead' 'blk_mq_dispatch_rq_list' 'ext4_free_inodes_count' 'ext4_free_inode' 'pcpu_alloc' 'ktime_get_seconds' 'iptunnel_xmit' 'run_timer_softirq' '__process_echoes' 'tick_do_update_jiffies64' 'generic_write_end' 'has_bh_in_lru' 'complete_signal' 'rcu_gp_fqs_check_wake' 'dd_has_work' '__lru_cache_add' 'ext4_has_free_clusters' 'clear_inode' 'snd_seq_prioq_cell_out' 'blk_mq_get_request' 'vm_area_dup' 'generic_fillattr' 'get_cpu_idle_time_us' '__delete_from_page_cache' 'generic_file_read_iter' 'do_syslog' 'futex_wait_queue_me' '__dentry_kill' 'xas_clear_mark' 'timer_clear_idle' 'xas_find_marked' 'pid_update_inode' 'fib6_ifup' 'ext4_mark_iloc_dirty' 'blk_mq_run_hw_queue' 'audit_log_start' '__snd_rawmidi_transmit_ack' 'yama_ptracer_del' 'mod_timer' 'find_next_bit' 'do_nanosleep' 'taskstats_exit' 'blk_mq_sched_dispatch_requests' 'd_delete' 'ext4_writepages' 'generic_update_time' 'fsnotify' 'iomap_dio_bio_actor' 'echo_char' 'rcu_gp_fqs_loop' '__ext4_new_inode' 'unix_release_sock' 'wbt_done' 'wbt_issue' 'shmem_getpage_gfp' 'ep_poll' 'do_signal_stop' 'kauditd_thread' 'commit_echoes' 'tomoyo_domain_quota_is_ok' 'snd_timer_pause' 'poll_schedule_timeout' 'shmem_file_read_iter' '__add_to_page_cache_locked' 'find_get_pages_range_tag' 'pipe_double_lock' 'n_tty_receive_buf_common' [ 101.007706][ C1] ================================================================== [ 101.015827][ C1] BUG: KCSAN: data-race in ktime_get_with_offset / timekeeping_advance [ 101.024048][ C1] [ 101.026395][ C1] write to 0xffffffff8624b2c8 of 280 bytes by interrupt on cpu 0: [ 101.034298][ C1] timekeeping_advance+0x88e/0xd80 [ 101.039390][ C1] update_wall_time+0x19/0x20 [ 101.044059][ C1] tick_do_update_jiffies64+0x1a4/0x250 [ 101.049648][ C1] tick_sched_do_timer+0xd4/0xe0 [ 101.054693][ C1] tick_sched_timer+0x43/0xe0 [ 101.059392][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 101.064584][ C1] hrtimer_interrupt+0x22a/0x480 [ 101.069664][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 101.075170][ C1] apic_timer_interrupt+0xf/0x20 [ 101.080100][ C1] _raw_spin_unlock_irq+0x4e/0x80 [ 101.085159][ C1] finish_task_switch+0x7b/0x260 [ 101.090088][ C1] __schedule+0x30e/0x690 [ 101.094398][ C1] preempt_schedule_irq+0x57/0x90 [ 101.099419][ C1] restore_regs_and_return_to_kernel+0x0/0x25 [ 101.105759][ C1] __tsan_read4+0xb4/0x100 [ 101.110233][ C1] tcp_v4_do_rcv+0x2e2/0x520 [ 101.114809][ C1] __release_sock+0x135/0x1e0 [ 101.119476][ C1] release_sock+0x61/0x160 [ 101.123896][ C1] tcp_recvmsg+0x68f/0x1c90 [ 101.128519][ C1] inet_recvmsg+0xbb/0x250 [ 101.132928][ C1] sock_recvmsg+0x92/0xb0 [ 101.137253][ C1] sock_read_iter+0x15f/0x1e0 [ 101.141922][ C1] new_sync_read+0x4b1/0x4f0 [ 101.146504][ C1] __vfs_read+0xb1/0xc0 [ 101.150724][ C1] vfs_read+0x143/0x2c0 [ 101.155032][ C1] ksys_read+0x17b/0x1b0 [ 101.159257][ C1] __x64_sys_read+0x4c/0x60 [ 101.163744][ C1] do_syscall_64+0xcc/0x3a0 [ 101.168228][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 101.174109][ C1] [ 101.176430][ C1] read to 0xffffffff8624b2e8 of 8 bytes by interrupt on cpu 1: [ 101.183966][ C1] ktime_get_with_offset+0x136/0x230 [ 101.189249][ C1] netif_receive_skb_list_internal+0x551/0x830 [ 101.195400][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 101.200584][ C1] gro_normal_one+0x162/0x170 [ 101.205255][ C1] napi_gro_receive+0x288/0x300 [ 101.210095][ C1] receive_buf+0x284/0x30b0 [ 101.214653][ C1] virtnet_poll+0x436/0x7d0 [ 101.219147][ C1] net_rx_action+0x3ae/0xa90 [ 101.223752][ C1] __do_softirq+0x115/0x33f [ 101.228248][ C1] run_ksoftirqd+0x46/0x60 [ 101.232678][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 101.237597][ C1] kthread+0x1d4/0x200 [ 101.241709][ C1] ret_from_fork+0x1f/0x30 [ 101.246104][ C1] [ 101.248409][ C1] Reported by Kernel Concurrency Sanitizer on: [ 101.254558][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 101.262684][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.272897][ C1] ================================================================== [ 101.280942][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 101.287509][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 101.296165][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.306212][ C1] Call Trace: [ 101.309495][ C1] dump_stack+0x11d/0x181 [ 101.313808][ C1] panic+0x210/0x640 [ 101.317707][ C1] ? vprintk_func+0x8d/0x140 [ 101.322283][ C1] kcsan_report.cold+0xc/0xd [ 101.326914][ C1] kcsan_setup_watchpoint+0x3fe/0x460 [ 101.332282][ C1] __tsan_read8+0xc6/0x100 [ 101.336684][ C1] ktime_get_with_offset+0x136/0x230 [ 101.341972][ C1] netif_receive_skb_list_internal+0x551/0x830 [ 101.348111][ C1] ? __write_once_size+0x5a/0xe0 [ 101.353046][ C1] ? __rcu_read_unlock+0x66/0x3d0 [ 101.358197][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 101.363382][ C1] ? __write_once_size+0x91/0x110 [ 101.368398][ C1] gro_normal_one+0x162/0x170 [ 101.373086][ C1] napi_gro_receive+0x288/0x300 [ 101.377936][ C1] receive_buf+0x284/0x30b0 [ 101.382433][ C1] ? skb_free_head+0x71/0x80 [ 101.387025][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 101.392478][ C1] ? virtqueue_get_buf+0x31/0x40 [ 101.397424][ C1] virtnet_poll+0x436/0x7d0 [ 101.401922][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 101.408161][ C1] net_rx_action+0x3ae/0xa90 [ 101.412751][ C1] __do_softirq+0x115/0x33f [ 101.417270][ C1] ? takeover_tasklets+0x250/0x250 [ 101.422378][ C1] run_ksoftirqd+0x46/0x60 [ 101.426822][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 101.431755][ C1] kthread+0x1d4/0x200 [ 101.435819][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 101.441794][ C1] ? kthread_unpark+0xe0/0xe0 [ 101.446480][ C1] ret_from_fork+0x1f/0x30 [ 101.452200][ C1] Kernel Offset: disabled [ 101.456534][ C1] Rebooting in 86400 seconds..