[info] Using makefile-style concurrent boot in runlevel 2. [ 42.209408][ T26] audit: type=1800 audit(1574000856.062:21): pid=7465 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 42.257859][ T26] audit: type=1800 audit(1574000856.062:22): pid=7465 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 '10.128.1.36' (ECDSA) to the list of known hosts. 2019/11/17 14:27:48 fuzzer started 2019/11/17 14:27:50 dialing manager at 10.128.0.105:33487 2019/11/17 14:27:50 syscalls: 2566 2019/11/17 14:27:50 code coverage: enabled 2019/11/17 14:27:50 comparison tracing: enabled 2019/11/17 14:27:50 extra coverage: extra coverage is not supported by the kernel 2019/11/17 14:27:50 setuid sandbox: enabled 2019/11/17 14:27:50 namespace sandbox: enabled 2019/11/17 14:27:50 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/17 14:27:50 fault injection: enabled 2019/11/17 14:27:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/17 14:27:50 net packet injection: enabled 2019/11/17 14:27:50 net device setup: enabled 2019/11/17 14:27:50 concurrency sanitizer: enabled 2019/11/17 14:27:50 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 57.304974][ T7632] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/17 14:28:01 adding functions to KCSAN blacklist: 'commit_echoes' 'poll_schedule_timeout' 'find_group_orlov' 'p9_poll_workfn' 'snd_ctl_notify' 'queue_access_lock' '__ext4_new_inode' 'blk_mq_get_request' '__snd_rawmidi_transmit_ack' 'balance_dirty_pages' 'blk_mq_sched_dispatch_requests' 'copy_process' 'generic_fillattr' 'taskstats_exit' 'do_syslog' 'pid_update_inode' 'ext4_has_free_clusters' 'pipe_poll' 'blk_mq_dispatch_rq_list' 'xas_clear_mark' '__mark_inode_dirty' '__process_echoes' 'mod_timer' 'n_tty_receive_buf_common' 'mem_cgroup_select_victim_node' 'ext4_nonda_switch' 'delete_from_page_cache_batch' 'process_srcu' 'mm_update_next_owner' 'snd_seq_check_queue' 'tomoyo_supervisor' 'tick_nohz_idle_stop_tick' 'page_counter_try_charge' 'list_lru_count_one' 'pipe_wait' 'find_get_pages_range_tag' 'echo_char' 'kauditd_thread' 'run_timer_softirq' 'wbt_done' 'dd_has_work' 'wbt_issue' '__hrtimer_run_queues' 'ep_poll' 'ext4_free_inode' 'futex_wait_queue_me' 'relay_switch_subbuf' 'vm_area_dup' 'blk_mq_run_hw_queue' 'fprop_fraction_percpu' 'tcp_add_backlog' 'do_exit' 'ext4_free_inodes_count' 'filemap_map_pages' 'generic_write_end' 'timer_clear_idle' 'blk_stat_add' 'add_timer' 'lruvec_lru_size' '__delete_from_page_cache' 'netlink_overrun' 'rcu_gp_fqs_check_wake' 'tick_do_update_jiffies64' 'tick_sched_do_timer' 'audit_log_start' 'rcu_gp_fqs_loop' 'ktime_get_real_seconds' 'xas_find_marked' 'find_next_bit' 'do_nanosleep' 'yama_ptracer_del' [ 159.027946][ T7622] ================================================================== [ 159.036127][ T7622] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 159.044002][ T7622] [ 159.046331][ T7622] write to 0xffffffff8603bb08 of 280 bytes by interrupt on cpu 0: [ 159.054147][ T7622] timekeeping_advance+0x88e/0xd80 [ 159.059256][ T7622] update_wall_time+0x19/0x20 [ 159.063965][ T7622] tick_do_update_jiffies64+0x1a4/0x250 [ 159.069511][ T7622] tick_sched_do_timer+0xd4/0xe0 [ 159.074445][ T7622] tick_sched_timer+0x43/0xe0 [ 159.079129][ T7622] __hrtimer_run_queues+0x274/0x5f0 [ 159.084333][ T7622] hrtimer_interrupt+0x22a/0x480 [ 159.089276][ T7622] smp_apic_timer_interrupt+0xdc/0x280 [ 159.094735][ T7622] apic_timer_interrupt+0xf/0x20 [ 159.099787][ T7622] __tsan_read8+0x87/0x100 [ 159.104203][ T7622] __netif_receive_skb_core+0xce2/0x1a90 [ 159.109867][ T7622] __netif_receive_skb_one_core+0x67/0xe0 [ 159.115589][ T7622] __netif_receive_skb+0x37/0xf0 [ 159.120521][ T7622] netif_receive_skb_internal+0x59/0x190 [ 159.126149][ T7622] napi_gro_receive+0x28f/0x330 [ 159.130981][ T7622] receive_buf+0x284/0x30b0 [ 159.135464][ T7622] virtnet_poll+0x436/0x7d0 [ 159.139943][ T7622] net_rx_action+0x3ae/0xa90 [ 159.144511][ T7622] __do_softirq+0x115/0x33f [ 159.149008][ T7622] run_ksoftirqd+0x46/0x60 [ 159.153403][ T7622] smpboot_thread_fn+0x37d/0x4a0 [ 159.158316][ T7622] kthread+0x1d4/0x200 [ 159.162364][ T7622] ret_from_fork+0x1f/0x30 [ 159.166751][ T7622] [ 159.169063][ T7622] read to 0xffffffff8603bb80 of 8 bytes by task 7622 on cpu 1: [ 159.176589][ T7622] ktime_get_seconds+0x45/0x70 [ 159.181335][ T7622] tcp_rcv_established+0xeeb/0xf50 [ 159.186425][ T7622] tcp_v4_do_rcv+0x3b5/0x520 [ 159.190995][ T7622] __release_sock+0x135/0x1e0 [ 159.195649][ T7622] release_sock+0x61/0x160 [ 159.200055][ T7622] tcp_recvmsg+0x653/0x1b40 [ 159.204552][ T7622] inet_recvmsg+0xbb/0x250 [ 159.208947][ T7622] sock_recvmsg+0x92/0xb0 [ 159.213254][ T7622] sock_read_iter+0x15f/0x1e0 [ 159.217923][ T7622] new_sync_read+0x389/0x4f0 [ 159.222508][ T7622] __vfs_read+0xb1/0xc0 [ 159.226648][ T7622] vfs_read+0x143/0x2c0 [ 159.230941][ T7622] ksys_read+0xd5/0x1b0 [ 159.235089][ T7622] __x64_sys_read+0x4c/0x60 [ 159.239744][ T7622] do_syscall_64+0xcc/0x370 [ 159.244238][ T7622] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 159.250105][ T7622] [ 159.252415][ T7622] Reported by Kernel Concurrency Sanitizer on: [ 159.258552][ T7622] CPU: 1 PID: 7622 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 159.265988][ T7622] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 159.276152][ T7622] ================================================================== [ 159.284205][ T7622] Kernel panic - not syncing: panic_on_warn set ... [ 159.290780][ T7622] CPU: 1 PID: 7622 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 159.298214][ T7622] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 159.308245][ T7622] Call Trace: [ 159.311546][ T7622] dump_stack+0x11d/0x181 [ 159.315914][ T7622] panic+0x210/0x640 [ 159.319798][ T7622] ? vprintk_func+0x8d/0x140 [ 159.324381][ T7622] kcsan_report.cold+0xc/0xd [ 159.329048][ T7622] kcsan_setup_watchpoint+0x3fe/0x460 [ 159.334415][ T7622] __tsan_read8+0xc6/0x100 [ 159.338819][ T7622] ktime_get_seconds+0x45/0x70 [ 159.343572][ T7622] tcp_rcv_established+0xeeb/0xf50 [ 159.348675][ T7622] ? ipv4_dst_check+0xc6/0xf0 [ 159.353339][ T7622] tcp_v4_do_rcv+0x3b5/0x520 [ 159.357915][ T7622] __release_sock+0x135/0x1e0 [ 159.362576][ T7622] release_sock+0x61/0x160 [ 159.366974][ T7622] tcp_recvmsg+0x653/0x1b40 [ 159.371471][ T7622] inet_recvmsg+0xbb/0x250 [ 159.375877][ T7622] ? apparmor_socket_recvmsg+0x3b/0x50 [ 159.381317][ T7622] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 159.387625][ T7622] ? security_socket_recvmsg+0x92/0xb0 [ 159.393080][ T7622] ? inet_sendpage+0x100/0x100 [ 159.397833][ T7622] sock_recvmsg+0x92/0xb0 [ 159.402162][ T7622] sock_read_iter+0x15f/0x1e0 [ 159.406830][ T7622] new_sync_read+0x389/0x4f0 [ 159.411405][ T7622] __vfs_read+0xb1/0xc0 [ 159.415546][ T7622] vfs_read+0x143/0x2c0 [ 159.419682][ T7622] ksys_read+0xd5/0x1b0 [ 159.423818][ T7622] __x64_sys_read+0x4c/0x60 [ 159.428315][ T7622] do_syscall_64+0xcc/0x370 [ 159.432814][ T7622] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 159.438681][ T7622] RIP: 0033:0x47c530 [ 159.442556][ T7622] 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 [ 159.462149][ T7622] RSP: 002b:000000c4204eb7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 159.470552][ T7622] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 159.478501][ T7622] RDX: 0000000000001000 RSI: 000000c4200b0000 RDI: 0000000000000003 [ 159.486458][ T7622] RBP: 000000c4204eb830 R08: 0000000000000000 R09: 0000000000000000 [ 159.494418][ T7622] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000002 [ 159.502371][ T7622] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 159.511745][ T7622] Kernel Offset: disabled [ 159.516068][ T7622] Rebooting in 86400 seconds..