[ 52.529136][ T26] audit: type=1800 audit(1572956853.633:26): pid=7843 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 52.572547][ T26] audit: type=1800 audit(1572956853.643:27): pid=7843 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 52.593053][ T26] audit: type=1800 audit(1572956853.643:28): pid=7843 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. [ 53.518283][ T26] audit: type=1800 audit(1572956854.663:29): pid=7843 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 '10.128.0.121' (ECDSA) to the list of known hosts. 2019/11/05 12:27:45 fuzzer started 2019/11/05 12:27:47 dialing manager at 10.128.0.105:39277 2019/11/05 12:27:48 syscalls: 2553 2019/11/05 12:27:48 code coverage: enabled 2019/11/05 12:27:48 comparison tracing: enabled 2019/11/05 12:27:48 extra coverage: extra coverage is not supported by the kernel 2019/11/05 12:27:48 setuid sandbox: enabled 2019/11/05 12:27:48 namespace sandbox: enabled 2019/11/05 12:27:48 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/05 12:27:48 fault injection: enabled 2019/11/05 12:27:48 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/05 12:27:48 net packet injection: enabled 2019/11/05 12:27:48 net device setup: enabled 2019/11/05 12:27:48 concurrency sanitizer: enabled 2019/11/05 12:27:48 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/05 12:27:51 adding functions to KCSAN blacklist: 'tick_sched_do_timer' 'taskstats_exit' 'xas_clear_mark' 'timer_clear_idle' 'blk_mq_dispatch_rq_list' 'tcp_add_backlog' 'pid_update_inode' 'kauditd_thread' 'tick_do_update_jiffies64' 'vm_area_dup' 'ext4_free_inode' 'find_next_bit' 'ep_insert' '__ext4_new_inode' 'ext4_nonda_switch' 'pipe_poll' 'ktime_get_real_seconds' 'generic_write_end' 'generic_permission' '__hrtimer_run_queues' 'ep_poll' 'task_dump_owner' 'tomoyo_supervisor' 'do_exit' 'copy_process' 'dd_has_work' syzkaller login: [ 73.309514][ T8010] ================================================================== [ 73.317777][ T8010] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 73.325859][ T8010] [ 73.328205][ T8010] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 0: [ 73.336016][ T8010] timekeeping_advance+0x88e/0xd80 [ 73.341124][ T8010] update_wall_time+0x19/0x20 [ 73.345800][ T8010] tick_do_update_jiffies64+0x1a4/0x250 [ 73.351332][ T8010] tick_sched_do_timer+0xd4/0xe0 [ 73.356254][ T8010] tick_sched_timer+0x43/0xe0 [ 73.360923][ T8010] __hrtimer_run_queues+0x274/0x5f0 [ 73.366103][ T8010] hrtimer_interrupt+0x22a/0x480 [ 73.371026][ T8010] smp_apic_timer_interrupt+0xdc/0x280 [ 73.376562][ T8010] apic_timer_interrupt+0xf/0x20 [ 73.381487][ T8010] __tsan_read8+0x6c/0x1f0 [ 73.385906][ T8010] ipt_do_table+0x23f/0xe60 [ 73.390396][ T8010] iptable_mangle_hook+0x7a/0x260 [ 73.395401][ T8010] nf_hook_slow+0x83/0x160 [ 73.399801][ T8010] ip_rcv+0x12f/0x1a0 [ 73.403767][ T8010] __netif_receive_skb_one_core+0xa7/0xe0 [ 73.409474][ T8010] __netif_receive_skb+0x37/0xf0 [ 73.414404][ T8010] netif_receive_skb_internal+0x59/0x190 [ 73.420023][ T8010] napi_gro_receive+0x28f/0x330 [ 73.424859][ T8010] receive_buf+0x284/0x30b0 [ 73.429342][ T8010] virtnet_poll+0x436/0x7d0 [ 73.433838][ T8010] net_rx_action+0x3ae/0xa90 [ 73.438414][ T8010] __do_softirq+0x115/0x33f [ 73.442902][ T8010] run_ksoftirqd+0x46/0x60 [ 73.447485][ T8010] smpboot_thread_fn+0x37d/0x4a0 [ 73.452405][ T8010] kthread+0x1d4/0x200 [ 73.456468][ T8010] ret_from_fork+0x1f/0x30 [ 73.460865][ T8010] [ 73.463180][ T8010] read to 0xffffffff86041b80 of 8 bytes by task 8010 on cpu 1: [ 73.470703][ T8010] ktime_get_seconds+0x45/0x70 [ 73.475448][ T8010] tcp_rcv_established+0xeeb/0xf50 [ 73.480541][ T8010] tcp_v4_do_rcv+0x3b5/0x520 [ 73.485114][ T8010] __release_sock+0x135/0x1e0 [ 73.489770][ T8010] release_sock+0x61/0x160 [ 73.494175][ T8010] tcp_recvmsg+0x653/0x1b40 [ 73.498671][ T8010] inet_recvmsg+0xbb/0x250 [ 73.503070][ T8010] sock_recvmsg+0x92/0xb0 [ 73.507379][ T8010] sock_read_iter+0x15f/0x1e0 [ 73.512038][ T8010] new_sync_read+0x389/0x4f0 [ 73.516611][ T8010] __vfs_read+0xb1/0xc0 [ 73.520761][ T8010] vfs_read+0x143/0x2c0 [ 73.524898][ T8010] ksys_read+0xd5/0x1b0 [ 73.529032][ T8010] __x64_sys_read+0x4c/0x60 [ 73.533529][ T8010] do_syscall_64+0xcc/0x370 [ 73.538018][ T8010] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.543981][ T8010] [ 73.546303][ T8010] Reported by Kernel Concurrency Sanitizer on: [ 73.552613][ T8010] CPU: 1 PID: 8010 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 73.560046][ T8010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.570081][ T8010] ================================================================== [ 73.578128][ T8010] Kernel panic - not syncing: panic_on_warn set ... [ 73.584698][ T8010] CPU: 1 PID: 8010 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 73.592147][ T8010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.602209][ T8010] Call Trace: [ 73.605491][ T8010] dump_stack+0xf5/0x159 [ 73.610078][ T8010] panic+0x210/0x640 [ 73.613971][ T8010] ? vprintk_func+0x8d/0x140 [ 73.618548][ T8010] kcsan_report.cold+0xc/0xe [ 73.623136][ T8010] kcsan_setup_watchpoint+0x3fe/0x410 [ 73.628501][ T8010] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 73.634209][ T8010] __tsan_read8+0x145/0x1f0 [ 73.638704][ T8010] ktime_get_seconds+0x45/0x70 [ 73.643461][ T8010] tcp_rcv_established+0xeeb/0xf50 [ 73.648562][ T8010] ? ipv4_dst_check+0xc6/0xf0 [ 73.653230][ T8010] tcp_v4_do_rcv+0x3b5/0x520 [ 73.657821][ T8010] __release_sock+0x135/0x1e0 [ 73.662508][ T8010] release_sock+0x61/0x160 [ 73.666930][ T8010] tcp_recvmsg+0x653/0x1b40 [ 73.671461][ T8010] inet_recvmsg+0xbb/0x250 [ 73.675865][ T8010] ? apparmor_socket_recvmsg+0x3b/0x50 [ 73.681412][ T8010] ? security_socket_recvmsg+0x92/0xb0 [ 73.686855][ T8010] ? inet_sendpage+0x100/0x100 [ 73.691604][ T8010] sock_recvmsg+0x92/0xb0 [ 73.695923][ T8010] sock_read_iter+0x15f/0x1e0 [ 73.700606][ T8010] new_sync_read+0x389/0x4f0 [ 73.705204][ T8010] __vfs_read+0xb1/0xc0 [ 73.709350][ T8010] vfs_read+0x143/0x2c0 [ 73.713576][ T8010] ksys_read+0xd5/0x1b0 [ 73.717892][ T8010] __x64_sys_read+0x4c/0x60 [ 73.722384][ T8010] do_syscall_64+0xcc/0x370 [ 73.726887][ T8010] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.732763][ T8010] RIP: 0033:0x47c530 [ 73.736653][ T8010] 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 [ 73.756265][ T8010] RSP: 002b:000000c42037d810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 73.765791][ T8010] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 73.773839][ T8010] RDX: 0000000000001000 RSI: 000000c4203f2000 RDI: 0000000000000003 [ 73.782141][ T8010] RBP: 000000c42037d868 R08: 0000000000000000 R09: 0000000000000000 [ 73.790103][ T8010] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 [ 73.798158][ T8010] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 73.807588][ T8010] Kernel Offset: disabled [ 73.811919][ T8010] Rebooting in 86400 seconds..