[ 52.919782][ T26] audit: type=1800 audit(1573099936.981:26): pid=7928 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 52.946385][ T26] audit: type=1800 audit(1573099936.981:27): pid=7928 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 52.966671][ T26] audit: type=1800 audit(1573099936.981:28): pid=7928 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. [ 53.727485][ T26] audit: type=1800 audit(1573099937.821:29): pid=7928 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts. 2019/11/07 04:12:27 fuzzer started 2019/11/07 04:12:29 dialing manager at 10.128.0.105:34849 2019/11/07 04:12:29 syscalls: 2553 2019/11/07 04:12:29 code coverage: enabled 2019/11/07 04:12:29 comparison tracing: enabled 2019/11/07 04:12:29 extra coverage: extra coverage is not supported by the kernel 2019/11/07 04:12:29 setuid sandbox: enabled 2019/11/07 04:12:29 namespace sandbox: enabled 2019/11/07 04:12:29 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/07 04:12:29 fault injection: enabled 2019/11/07 04:12:29 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/07 04:12:29 net packet injection: enabled 2019/11/07 04:12:29 net device setup: enabled 2019/11/07 04:12:29 concurrency sanitizer: enabled 2019/11/07 04:12:29 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 70.035176][ T8096] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/07 04:12:36 adding functions to KCSAN blacklist: 'taskstats_exit' 'fasync_remove_entry' 'mod_timer' 'page_counter_charge' 'task_dump_owner' 'tomoyo_supervisor' 'tcp_add_backlog' 'generic_write_end' 'fanotify_handle_event' 'blk_mq_sched_dispatch_requests' 'netlink_recvmsg' 'ktime_get_real_seconds' 'ext4_has_free_clusters' 'vm_area_dup' 'kauditd_thread' '__acct_update_integrals' 'p9_poll_workfn' 'do_nanosleep' 'tick_nohz_idle_stop_tick' 'blk_mq_get_request' 'blk_mq_free_request' '__ext4_new_inode' 'mm_update_next_owner' 'echo_char' 'ep_poll' 'pipe_poll' 'writeback_sb_inodes' 'run_timer_softirq' 'generic_permission' 'tick_sched_do_timer' 'poll_schedule_timeout' 'xas_clear_mark' 'ext4_nonda_switch' '__hrtimer_run_queues' 'find_next_bit' 'blk_mq_dispatch_rq_list' 'rcu_gp_fqs_check_wake' 'alloc_empty_file' 'generic_fillattr' 'dd_has_work' 'fsnotify' 'tick_do_update_jiffies64' 'ext4_free_inode' 'process_srcu' 'ext4_free_inodes_count' 'queue_access_lock' 'pid_update_inode' 'audit_log_start' [ 77.839867][ T8086] ================================================================== [ 77.848034][ T8086] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 77.855941][ T8086] [ 77.858298][ T8086] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 1: [ 77.866204][ T8086] timekeeping_advance+0x88e/0xd80 [ 77.871327][ T8086] update_wall_time+0x19/0x20 [ 77.876064][ T8086] tick_do_update_jiffies64+0x1a4/0x250 [ 77.881596][ T8086] tick_sched_do_timer+0xd4/0xe0 [ 77.886517][ T8086] tick_sched_timer+0x43/0xe0 [ 77.891312][ T8086] __hrtimer_run_queues+0x274/0x5f0 [ 77.896493][ T8086] hrtimer_interrupt+0x22a/0x480 [ 77.901419][ T8086] smp_apic_timer_interrupt+0xdc/0x280 [ 77.906861][ T8086] apic_timer_interrupt+0xf/0x20 [ 77.911784][ T8086] __tsan_unaligned_write4+0x64/0x1f0 [ 77.922439][ T8086] __skb_clone+0x1e3/0x390 [ 77.926848][ T8086] skb_clone+0x128/0x290 [ 77.931086][ T8086] packet_rcv_spkt+0x2b9/0x310 [ 77.935845][ T8086] __netif_receive_skb_core+0xe13/0x1a90 [ 77.941475][ T8086] __netif_receive_skb_one_core+0x67/0xe0 [ 77.947178][ T8086] __netif_receive_skb+0x37/0xf0 [ 77.952103][ T8086] netif_receive_skb_internal+0x59/0x190 [ 77.957715][ T8086] napi_gro_receive+0x28f/0x330 [ 77.962548][ T8086] receive_buf+0x284/0x30b0 [ 77.967031][ T8086] virtnet_poll+0x436/0x7d0 [ 77.971531][ T8086] net_rx_action+0x3ae/0xa90 [ 77.976107][ T8086] __do_softirq+0x115/0x33f [ 77.980594][ T8086] run_ksoftirqd+0x46/0x60 [ 77.984992][ T8086] smpboot_thread_fn+0x37d/0x4a0 [ 77.989930][ T8086] kthread+0x1d4/0x200 [ 77.993986][ T8086] ret_from_fork+0x1f/0x30 [ 77.998738][ T8086] [ 78.001056][ T8086] read to 0xffffffff86041b80 of 8 bytes by task 8086 on cpu 0: [ 78.008582][ T8086] ktime_get_seconds+0x45/0x70 [ 78.013329][ T8086] tcp_rcv_established+0xeeb/0xf50 [ 78.019120][ T8086] tcp_v4_do_rcv+0x3b5/0x520 [ 78.023692][ T8086] __release_sock+0x135/0x1e0 [ 78.028351][ T8086] release_sock+0x61/0x160 [ 78.032747][ T8086] tcp_recvmsg+0x653/0x1b40 [ 78.037232][ T8086] inet_recvmsg+0xbb/0x250 [ 78.041633][ T8086] sock_recvmsg+0x92/0xb0 [ 78.045945][ T8086] sock_read_iter+0x15f/0x1e0 [ 78.050606][ T8086] new_sync_read+0x389/0x4f0 [ 78.055195][ T8086] __vfs_read+0xb1/0xc0 [ 78.059621][ T8086] vfs_read+0x143/0x2c0 [ 78.063813][ T8086] ksys_read+0xd5/0x1b0 [ 78.067975][ T8086] __x64_sys_read+0x4c/0x60 [ 78.072479][ T8086] do_syscall_64+0xcc/0x370 [ 78.077024][ T8086] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 78.082943][ T8086] [ 78.085249][ T8086] Reported by Kernel Concurrency Sanitizer on: [ 78.091395][ T8086] CPU: 0 PID: 8086 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 78.098848][ T8086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.108887][ T8086] ================================================================== [ 78.116931][ T8086] Kernel panic - not syncing: panic_on_warn set ... [ 78.123505][ T8086] CPU: 0 PID: 8086 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 78.130945][ T8086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.140977][ T8086] Call Trace: [ 78.144259][ T8086] dump_stack+0xf5/0x159 [ 78.148490][ T8086] panic+0x210/0x640 [ 78.152374][ T8086] ? vprintk_func+0x8d/0x140 [ 78.156951][ T8086] kcsan_report.cold+0xc/0xe [ 78.161533][ T8086] kcsan_setup_watchpoint+0x3fe/0x410 [ 78.166903][ T8086] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 78.172622][ T8086] __tsan_read8+0x145/0x1f0 [ 78.177111][ T8086] ktime_get_seconds+0x45/0x70 [ 78.181881][ T8086] tcp_rcv_established+0xeeb/0xf50 [ 78.186981][ T8086] ? ipv4_dst_check+0xc6/0xf0 [ 78.191650][ T8086] tcp_v4_do_rcv+0x3b5/0x520 [ 78.196231][ T8086] __release_sock+0x135/0x1e0 [ 78.200904][ T8086] release_sock+0x61/0x160 [ 78.205321][ T8086] tcp_recvmsg+0x653/0x1b40 [ 78.209822][ T8086] inet_recvmsg+0xbb/0x250 [ 78.214224][ T8086] ? apparmor_socket_recvmsg+0x3b/0x50 [ 78.219688][ T8086] ? security_socket_recvmsg+0x92/0xb0 [ 78.225137][ T8086] ? inet_sendpage+0x100/0x100 [ 78.229979][ T8086] sock_recvmsg+0x92/0xb0 [ 78.234298][ T8086] sock_read_iter+0x15f/0x1e0 [ 78.238965][ T8086] new_sync_read+0x389/0x4f0 [ 78.243547][ T8086] __vfs_read+0xb1/0xc0 [ 78.247689][ T8086] vfs_read+0x143/0x2c0 [ 78.251830][ T8086] ksys_read+0xd5/0x1b0 [ 78.255973][ T8086] __x64_sys_read+0x4c/0x60 [ 78.260477][ T8086] do_syscall_64+0xcc/0x370 [ 78.265024][ T8086] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 78.271165][ T8086] RIP: 0033:0x47c530 [ 78.275057][ T8086] 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 [ 78.294650][ T8086] RSP: 002b:000000c42013d7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 78.303089][ T8086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 78.311047][ T8086] RDX: 0000000000001000 RSI: 000000c42024a000 RDI: 0000000000000003 [ 78.319059][ T8086] RBP: 000000c42013d830 R08: 0000000000000000 R09: 0000000000000000 [ 78.327138][ T8086] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000008 [ 78.335318][ T8086] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 78.344659][ T8086] Kernel Offset: disabled [ 78.349045][ T8086] Rebooting in 86400 seconds..