[ 51.655826][ T26] audit: type=1800 audit(1573052075.301:28): pid=7955 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. [ 52.312351][ T8018] sshd (8018) used greatest stack depth: 10128 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.574386][ T26] audit: type=1800 audit(1573052076.311:29): pid=7955 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 [ 52.594520][ T26] audit: type=1800 audit(1573052076.311:30): pid=7955 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 '10.128.0.5' (ECDSA) to the list of known hosts. 2019/11/06 14:54:44 fuzzer started 2019/11/06 14:54:46 dialing manager at 10.128.0.105:44951 2019/11/06 14:54:47 syscalls: 2553 2019/11/06 14:54:47 code coverage: enabled 2019/11/06 14:54:47 comparison tracing: enabled 2019/11/06 14:54:47 extra coverage: extra coverage is not supported by the kernel 2019/11/06 14:54:47 setuid sandbox: enabled 2019/11/06 14:54:47 namespace sandbox: enabled 2019/11/06 14:54:47 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/06 14:54:47 fault injection: enabled 2019/11/06 14:54:47 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/06 14:54:47 net packet injection: enabled 2019/11/06 14:54:47 net device setup: enabled 2019/11/06 14:54:47 concurrency sanitizer: enabled 2019/11/06 14:54:47 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/06 14:54:50 adding functions to KCSAN blacklist: 'echo_char' 'pipe_poll' 'tcp_add_backlog' '__skb_try_recv_from_queue' 'ep_poll' 'generic_permission' 'rcu_gp_fqs_check_wake' 'taskstats_exit' 'ext4_nonda_switch' '__hrtimer_run_queues' 'pid_update_inode' 'tomoyo_supervisor' 'blk_mq_dispatch_rq_list' 'wbt_done' 'ktime_get_real_seconds' 'find_next_bit' 'tick_do_update_jiffies64' 'do_nanosleep' 'dd_has_work' 'sit_tunnel_xmit' 'add_timer' syzkaller login: [ 69.588786][ T8116] ================================================================== [ 69.596965][ T8116] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 69.604851][ T8116] [ 69.607199][ T8116] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 1: [ 69.615119][ T8116] timekeeping_advance+0x88e/0xd80 [ 69.620245][ T8116] update_wall_time+0x19/0x20 [ 69.624941][ T8116] tick_do_update_jiffies64+0x1a4/0x250 [ 69.630517][ T8116] tick_sched_do_timer+0xd4/0xe0 [ 69.635501][ T8116] tick_sched_timer+0x43/0xe0 [ 69.640184][ T8116] __hrtimer_run_queues+0x274/0x5f0 [ 69.645388][ T8116] hrtimer_interrupt+0x22a/0x480 [ 69.650336][ T8116] smp_apic_timer_interrupt+0xdc/0x280 [ 69.655925][ T8116] apic_timer_interrupt+0xf/0x20 [ 69.660871][ T8116] __read_once_size+0x6/0xe0 [ 69.665452][ T8116] skb_page_frag_refill+0x66/0x260 [ 69.670634][ T8116] try_fill_recv+0x510/0xda0 [ 69.675206][ T8116] virtnet_poll+0x64c/0x7d0 [ 69.679700][ T8116] net_rx_action+0x3ae/0xa90 [ 69.684278][ T8116] __do_softirq+0x115/0x33f [ 69.688763][ T8116] run_ksoftirqd+0x46/0x60 [ 69.693180][ T8116] smpboot_thread_fn+0x37d/0x4a0 [ 69.698109][ T8116] kthread+0x1d4/0x200 [ 69.702162][ T8116] ret_from_fork+0x1f/0x30 [ 69.706563][ T8116] [ 69.708897][ T8116] read to 0xffffffff86041b80 of 8 bytes by task 8116 on cpu 0: [ 69.716420][ T8116] ktime_get_seconds+0x45/0x70 [ 69.721169][ T8116] tcp_rcv_established+0xeeb/0xf50 [ 69.726527][ T8116] tcp_v4_do_rcv+0x3b5/0x520 [ 69.731110][ T8116] __release_sock+0x135/0x1e0 [ 69.735770][ T8116] release_sock+0x61/0x160 [ 69.740166][ T8116] tcp_recvmsg+0x653/0x1b40 [ 69.744648][ T8116] inet_recvmsg+0xbb/0x250 [ 69.749048][ T8116] sock_recvmsg+0x92/0xb0 [ 69.753360][ T8116] sock_read_iter+0x15f/0x1e0 [ 69.758017][ T8116] new_sync_read+0x389/0x4f0 [ 69.762597][ T8116] __vfs_read+0xb1/0xc0 [ 69.766732][ T8116] vfs_read+0x143/0x2c0 [ 69.770897][ T8116] ksys_read+0xd5/0x1b0 [ 69.775300][ T8116] __x64_sys_read+0x4c/0x60 [ 69.779806][ T8116] do_syscall_64+0xcc/0x370 [ 69.784293][ T8116] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.790155][ T8116] [ 69.792472][ T8116] Reported by Kernel Concurrency Sanitizer on: [ 69.798622][ T8116] CPU: 0 PID: 8116 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 69.806063][ T8116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.816104][ T8116] ================================================================== [ 69.824155][ T8116] Kernel panic - not syncing: panic_on_warn set ... [ 69.830725][ T8116] CPU: 0 PID: 8116 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 69.838157][ T8116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.848191][ T8116] Call Trace: [ 69.851472][ T8116] dump_stack+0xf5/0x159 [ 69.855699][ T8116] panic+0x210/0x640 [ 69.859592][ T8116] ? vprintk_func+0x8d/0x140 [ 69.864169][ T8116] kcsan_report.cold+0xc/0xe [ 69.868764][ T8116] kcsan_setup_watchpoint+0x3fe/0x410 [ 69.874134][ T8116] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 69.879836][ T8116] __tsan_read8+0x145/0x1f0 [ 69.884433][ T8116] ktime_get_seconds+0x45/0x70 [ 69.889199][ T8116] tcp_rcv_established+0xeeb/0xf50 [ 69.894305][ T8116] ? ipv4_dst_check+0xc6/0xf0 [ 69.898967][ T8116] tcp_v4_do_rcv+0x3b5/0x520 [ 69.904600][ T8116] __release_sock+0x135/0x1e0 [ 69.909261][ T8116] release_sock+0x61/0x160 [ 69.913662][ T8116] tcp_recvmsg+0x653/0x1b40 [ 69.918160][ T8116] ? preempt_schedule_common+0x37/0x90 [ 69.923609][ T8116] inet_recvmsg+0xbb/0x250 [ 69.928022][ T8116] ? apparmor_socket_recvmsg+0x3b/0x50 [ 69.933479][ T8116] ? security_socket_recvmsg+0x92/0xb0 [ 69.938932][ T8116] ? inet_sendpage+0x100/0x100 [ 69.943684][ T8116] sock_recvmsg+0x92/0xb0 [ 69.948003][ T8116] sock_read_iter+0x15f/0x1e0 [ 69.952670][ T8116] new_sync_read+0x389/0x4f0 [ 69.957256][ T8116] __vfs_read+0xb1/0xc0 [ 69.961396][ T8116] vfs_read+0x143/0x2c0 [ 69.965537][ T8116] ksys_read+0xd5/0x1b0 [ 69.969766][ T8116] __x64_sys_read+0x4c/0x60 [ 69.974261][ T8116] do_syscall_64+0xcc/0x370 [ 69.978756][ T8116] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.984629][ T8116] RIP: 0033:0x47c530 [ 69.988513][ T8116] 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 [ 70.008099][ T8116] RSP: 002b:000000c42037f7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 70.016521][ T8116] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 70.024489][ T8116] RDX: 0000000000001000 RSI: 000000c4203de000 RDI: 0000000000000003 [ 70.032444][ T8116] RBP: 000000c42037f830 R08: 0000000000000000 R09: 0000000000000000 [ 70.040402][ T8116] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000008 [ 70.048444][ T8116] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 70.058095][ T8116] Kernel Offset: disabled [ 70.062426][ T8116] Rebooting in 86400 seconds..