[ 50.945904][ T26] audit: type=1800 audit(1573494302.369:27): pid=7838 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 50.976888][ T26] audit: type=1800 audit(1573494302.369:28): pid=7838 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.422297][ T26] audit: type=1800 audit(1573494302.929:29): pid=7838 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 51.442656][ T26] audit: type=1800 audit(1573494302.929:30): pid=7838 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.114' (ECDSA) to the list of known hosts. 2019/11/11 17:45:13 fuzzer started 2019/11/11 17:45:14 dialing manager at 10.128.0.105:44241 2019/11/11 17:45:20 syscalls: 2566 2019/11/11 17:45:20 code coverage: enabled 2019/11/11 17:45:20 comparison tracing: enabled 2019/11/11 17:45:20 extra coverage: extra coverage is not supported by the kernel 2019/11/11 17:45:20 setuid sandbox: enabled 2019/11/11 17:45:20 namespace sandbox: enabled 2019/11/11 17:45:20 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/11 17:45:20 fault injection: enabled 2019/11/11 17:45:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/11 17:45:20 net packet injection: enabled 2019/11/11 17:45:20 net device setup: enabled 2019/11/11 17:45:20 concurrency sanitizer: enabled 2019/11/11 17:45:20 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 75.067286][ T8002] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/11 17:45:27 adding functions to KCSAN blacklist: 'echo_char' 'pipe_poll' 'fsnotify' 'mod_timer' 'copy_process' 'snapshot_refaults' 'file_update_time' 'ep_poll' 'ktime_get_real_seconds' 'common_perm_cond' '__add_to_page_cache_locked' '__ip6_datagram_connect' 'tick_nohz_idle_stop_tick' 'p9_poll_workfn' 'pid_update_inode' '__hrtimer_run_queues' 'find_get_pages_range_tag' 'xas_clear_mark' 'bio_endio' 'mm_update_next_owner' 'generic_write_end' 'generic_permission' 'find_next_bit' 'run_timer_softirq' 'ext4_free_inode' 'ext4_has_free_clusters' 'n_tty_receive_buf_common' 'ext4_free_inodes_count' 'tomoyo_supervisor' 'tcp_add_backlog' 'wbt_done' 'blk_mq_dispatch_rq_list' 'filemap_map_pages' '__delete_from_page_cache' 'do_nanosleep' 'poll_schedule_timeout' 'generic_fillattr' 'lruvec_lru_size' 'audit_log_start' 'taskstats_exit' 'rcu_gp_fqs_check_wake' '__ext4_new_inode' 'do_exit' 'ext4_nonda_switch' 'tick_do_update_jiffies64' 'vm_area_dup' 'tick_sched_do_timer' [ 107.208959][ T8000] ================================================================== [ 107.217139][ T8000] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 107.225022][ T8000] [ 107.227365][ T8000] write to 0xffffffff86044b08 of 280 bytes by interrupt on cpu 0: [ 107.235275][ T8000] timekeeping_advance+0x88e/0xd80 [ 107.240411][ T8000] update_wall_time+0x19/0x20 [ 107.245123][ T8000] tick_do_update_jiffies64+0x1a4/0x250 [ 107.250691][ T8000] tick_sched_do_timer+0xd4/0xe0 [ 107.255646][ T8000] tick_sched_timer+0x43/0xe0 [ 107.260424][ T8000] __hrtimer_run_queues+0x274/0x5f0 [ 107.266235][ T8000] hrtimer_interrupt+0x22a/0x480 [ 107.271374][ T8000] smp_apic_timer_interrupt+0xdc/0x280 [ 107.276844][ T8000] apic_timer_interrupt+0xf/0x20 [ 107.281880][ T8000] memcpy_erms+0x8/0x10 [ 107.286055][ T8000] receive_buf+0x17c7/0x30b0 [ 107.290648][ T8000] virtnet_poll+0x436/0x7d0 [ 107.295140][ T8000] net_rx_action+0x3ae/0xa90 [ 107.299714][ T8000] __do_softirq+0x115/0x33f [ 107.304274][ T8000] run_ksoftirqd+0x46/0x60 [ 107.308863][ T8000] smpboot_thread_fn+0x37d/0x4a0 [ 107.313809][ T8000] kthread+0x1d4/0x200 [ 107.317885][ T8000] ret_from_fork+0x1f/0x30 [ 107.322279][ T8000] [ 107.324677][ T8000] read to 0xffffffff86044b80 of 8 bytes by task 8000 on cpu 1: [ 107.332219][ T8000] ktime_get_seconds+0x45/0x70 [ 107.336967][ T8000] tcp_rcv_established+0xeeb/0xf50 [ 107.342069][ T8000] tcp_v4_do_rcv+0x3b5/0x520 [ 107.346659][ T8000] __release_sock+0x135/0x1e0 [ 107.351320][ T8000] release_sock+0x61/0x160 [ 107.355845][ T8000] tcp_recvmsg+0x653/0x1b40 [ 107.360422][ T8000] inet_recvmsg+0xbb/0x250 [ 107.364826][ T8000] sock_recvmsg+0x92/0xb0 [ 107.369165][ T8000] sock_read_iter+0x15f/0x1e0 [ 107.373836][ T8000] new_sync_read+0x389/0x4f0 [ 107.378414][ T8000] __vfs_read+0xb1/0xc0 [ 107.382555][ T8000] vfs_read+0x143/0x2c0 [ 107.386730][ T8000] ksys_read+0xd5/0x1b0 [ 107.390884][ T8000] __x64_sys_read+0x4c/0x60 [ 107.395386][ T8000] do_syscall_64+0xcc/0x370 [ 107.399891][ T8000] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 107.405756][ T8000] [ 107.408078][ T8000] Reported by Kernel Concurrency Sanitizer on: [ 107.414226][ T8000] CPU: 1 PID: 8000 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 107.421659][ T8000] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.431710][ T8000] ================================================================== [ 107.439763][ T8000] Kernel panic - not syncing: panic_on_warn set ... [ 107.446433][ T8000] CPU: 1 PID: 8000 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 107.453985][ T8000] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.464210][ T8000] Call Trace: [ 107.467673][ T8000] dump_stack+0xf5/0x159 [ 107.472280][ T8000] panic+0x210/0x640 [ 107.476169][ T8000] ? vprintk_func+0x8d/0x140 [ 107.480749][ T8000] kcsan_report.cold+0xc/0xe [ 107.485422][ T8000] kcsan_setup_watchpoint+0x3fe/0x410 [ 107.490788][ T8000] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 107.496517][ T8000] __tsan_read8+0x145/0x1f0 [ 107.501098][ T8000] ktime_get_seconds+0x45/0x70 [ 107.505847][ T8000] tcp_rcv_established+0xeeb/0xf50 [ 107.510957][ T8000] ? ipv4_dst_check+0xc6/0xf0 [ 107.515749][ T8000] tcp_v4_do_rcv+0x3b5/0x520 [ 107.520344][ T8000] __release_sock+0x135/0x1e0 [ 107.525017][ T8000] release_sock+0x61/0x160 [ 107.529427][ T8000] tcp_recvmsg+0x653/0x1b40 [ 107.533933][ T8000] ? preempt_schedule_common+0x37/0x90 [ 107.539502][ T8000] inet_recvmsg+0xbb/0x250 [ 107.543924][ T8000] ? apparmor_socket_recvmsg+0x3b/0x50 [ 107.549377][ T8000] ? security_socket_recvmsg+0x92/0xb0 [ 107.554838][ T8000] ? inet_sendpage+0x100/0x100 [ 107.559589][ T8000] sock_recvmsg+0x92/0xb0 [ 107.563919][ T8000] sock_read_iter+0x15f/0x1e0 [ 107.568588][ T8000] new_sync_read+0x389/0x4f0 [ 107.573173][ T8000] __vfs_read+0xb1/0xc0 [ 107.577315][ T8000] vfs_read+0x143/0x2c0 [ 107.581457][ T8000] ksys_read+0xd5/0x1b0 [ 107.585946][ T8000] __x64_sys_read+0x4c/0x60 [ 107.590439][ T8000] do_syscall_64+0xcc/0x370 [ 107.594931][ T8000] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 107.600805][ T8000] RIP: 0033:0x47c530 [ 107.604688][ T8000] 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 [ 107.624287][ T8000] RSP: 002b:000000c4204eb7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 107.632695][ T8000] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 107.640823][ T8000] RDX: 0000000000001000 RSI: 000000c42036a000 RDI: 0000000000000003 [ 107.648775][ T8000] RBP: 000000c4204eb830 R08: 0000000000000000 R09: 0000000000000000 [ 107.656752][ T8000] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000080 [ 107.664706][ T8000] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 107.674378][ T8000] Kernel Offset: disabled [ 107.678710][ T8000] Rebooting in 86400 seconds..