[ 50.048432][ T26] audit: type=1800 audit(1572913914.931:27): pid=7815 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 50.095680][ T26] audit: type=1800 audit(1572913914.931:28): pid=7815 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. [ 50.760239][ T26] audit: type=1800 audit(1572913915.731:29): pid=7815 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 [ 50.780452][ T26] audit: type=1800 audit(1572913915.741:30): pid=7815 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 '10.128.0.148' (ECDSA) to the list of known hosts. 2019/11/05 00:32:04 fuzzer started 2019/11/05 00:32:06 dialing manager at 10.128.0.105:37793 2019/11/05 00:32:07 syscalls: 2553 2019/11/05 00:32:07 code coverage: enabled 2019/11/05 00:32:07 comparison tracing: enabled 2019/11/05 00:32:07 extra coverage: extra coverage is not supported by the kernel 2019/11/05 00:32:07 setuid sandbox: enabled 2019/11/05 00:32:07 namespace sandbox: enabled 2019/11/05 00:32:07 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/05 00:32:07 fault injection: enabled 2019/11/05 00:32:07 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/05 00:32:07 net packet injection: enabled 2019/11/05 00:32:07 net device setup: enabled 2019/11/05 00:32:07 concurrency sanitizer: enabled 2019/11/05 00:32:07 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 66.969570][ T7981] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/05 00:32:12 adding functions to KCSAN blacklist: '__splice_from_pipe' 'blk_mq_dispatch_rq_list' 'taskstats_exit' 'tick_do_update_jiffies64' 'ktime_get_real_seconds' 'blk_mq_sched_dispatch_requests' 'ep_poll' 'tomoyo_supervisor' '__hrtimer_run_queues' 'dd_has_work' 'atime_needs_update' 'ext4_nonda_switch' 'vm_area_dup' 'fanotify_handle_event' 'pid_update_inode' 'do_nanosleep' 'pipe_poll' 'echo_char' 'rcu_gp_fqs_check_wake' 'generic_write_end' 'generic_permission' '__ext4_new_inode' 'ext4_free_inodes_count' 'futex_wait_queue_me' 'do_exit' 'kvm_arch_vcpu_load' 'tcp_add_backlog' 'run_timer_softirq' 'blk_mq_get_request' 'wbt_done' 'find_get_pages_range_tag' 'poll_schedule_timeout' 'ext4_free_inode' 'mod_timer' 'generic_fillattr' 'tick_sched_do_timer' 'find_next_bit' [ 82.162502][ T7967] ================================================================== [ 82.170672][ T7967] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 82.178557][ T7967] [ 82.180897][ T7967] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 1: [ 82.188712][ T7967] timekeeping_advance+0x88e/0xd80 [ 82.193870][ T7967] update_wall_time+0x19/0x20 [ 82.198555][ T7967] tick_do_update_jiffies64+0x1a4/0x250 [ 82.204095][ T7967] tick_sched_do_timer+0xd4/0xe0 [ 82.209020][ T7967] tick_sched_timer+0x43/0xe0 [ 82.213685][ T7967] __hrtimer_run_queues+0x274/0x5f0 [ 82.218872][ T7967] hrtimer_interrupt+0x22a/0x480 [ 82.223799][ T7967] smp_apic_timer_interrupt+0xdc/0x280 [ 82.229247][ T7967] apic_timer_interrupt+0xf/0x20 [ 82.234173][ T7967] __tsan_read1+0x40/0x1e0 [ 82.238581][ T7967] tcp_v4_fill_cb+0xf1/0x1e0 [ 82.243194][ T7967] tcp_v4_rcv+0x17cb/0x1bd0 [ 82.247696][ T7967] ip_protocol_deliver_rcu+0x4d/0x420 [ 82.253066][ T7967] ip_local_deliver_finish+0x110/0x140 [ 82.258513][ T7967] ip_local_deliver+0x133/0x210 [ 82.263354][ T7967] ip_rcv_finish+0x121/0x160 [ 82.267949][ T7967] ip_rcv+0x18f/0x1a0 [ 82.271921][ T7967] __netif_receive_skb_one_core+0xa7/0xe0 [ 82.277667][ T7967] __netif_receive_skb+0x37/0xf0 [ 82.282590][ T7967] netif_receive_skb_internal+0x59/0x190 [ 82.288205][ T7967] napi_gro_receive+0x28f/0x330 [ 82.293039][ T7967] receive_buf+0x284/0x30b0 [ 82.297521][ T7967] virtnet_poll+0x436/0x7d0 [ 82.302045][ T7967] net_rx_action+0x3ae/0xa90 [ 82.306618][ T7967] __do_softirq+0x115/0x33f [ 82.311107][ T7967] run_ksoftirqd+0x46/0x60 [ 82.315504][ T7967] smpboot_thread_fn+0x37d/0x4a0 [ 82.320423][ T7967] kthread+0x1d4/0x200 [ 82.324472][ T7967] ret_from_fork+0x1f/0x30 [ 82.328867][ T7967] [ 82.331185][ T7967] read to 0xffffffff86041b80 of 8 bytes by task 7967 on cpu 0: [ 82.338719][ T7967] ktime_get_seconds+0x45/0x70 [ 82.343465][ T7967] tcp_rcv_established+0xeeb/0xf50 [ 82.348562][ T7967] tcp_v4_do_rcv+0x3b5/0x520 [ 82.353136][ T7967] __release_sock+0x135/0x1e0 [ 82.357807][ T7967] release_sock+0x61/0x160 [ 82.362203][ T7967] tcp_recvmsg+0x653/0x1b40 [ 82.366687][ T7967] inet_recvmsg+0xbb/0x250 [ 82.371085][ T7967] sock_recvmsg+0x92/0xb0 [ 82.375402][ T7967] sock_read_iter+0x15f/0x1e0 [ 82.380061][ T7967] new_sync_read+0x389/0x4f0 [ 82.384633][ T7967] __vfs_read+0xb1/0xc0 [ 82.388771][ T7967] vfs_read+0x143/0x2c0 [ 82.392921][ T7967] ksys_read+0xd5/0x1b0 [ 82.397060][ T7967] __x64_sys_read+0x4c/0x60 [ 82.401546][ T7967] do_syscall_64+0xcc/0x370 [ 82.406031][ T7967] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 82.411893][ T7967] [ 82.414198][ T7967] Reported by Kernel Concurrency Sanitizer on: [ 82.420334][ T7967] CPU: 0 PID: 7967 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 82.427792][ T7967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.437824][ T7967] ================================================================== [ 82.445863][ T7967] Kernel panic - not syncing: panic_on_warn set ... [ 82.452433][ T7967] CPU: 0 PID: 7967 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 82.459876][ T7967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.469908][ T7967] Call Trace: [ 82.473189][ T7967] dump_stack+0xf5/0x159 [ 82.477434][ T7967] panic+0x210/0x640 [ 82.481317][ T7967] ? vprintk_func+0x8d/0x140 [ 82.485902][ T7967] kcsan_report.cold+0xc/0xe [ 82.490479][ T7967] kcsan_setup_watchpoint+0x3fe/0x410 [ 82.495836][ T7967] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 82.501539][ T7967] __tsan_read8+0x145/0x1f0 [ 82.506028][ T7967] ktime_get_seconds+0x45/0x70 [ 82.510791][ T7967] tcp_rcv_established+0xeeb/0xf50 [ 82.515891][ T7967] ? ipv4_dst_check+0xc6/0xf0 [ 82.520556][ T7967] tcp_v4_do_rcv+0x3b5/0x520 [ 82.525149][ T7967] __release_sock+0x135/0x1e0 [ 82.529813][ T7967] release_sock+0x61/0x160 [ 82.534358][ T7967] tcp_recvmsg+0x653/0x1b40 [ 82.538874][ T7967] inet_recvmsg+0xbb/0x250 [ 82.543282][ T7967] ? apparmor_socket_recvmsg+0x3b/0x50 [ 82.548739][ T7967] ? security_socket_recvmsg+0x92/0xb0 [ 82.554191][ T7967] ? inet_sendpage+0x100/0x100 [ 82.559001][ T7967] sock_recvmsg+0x92/0xb0 [ 82.563323][ T7967] sock_read_iter+0x15f/0x1e0 [ 82.567992][ T7967] new_sync_read+0x389/0x4f0 [ 82.572572][ T7967] __vfs_read+0xb1/0xc0 [ 82.576714][ T7967] vfs_read+0x143/0x2c0 [ 82.580853][ T7967] ksys_read+0xd5/0x1b0 [ 82.584996][ T7967] __x64_sys_read+0x4c/0x60 [ 82.589488][ T7967] do_syscall_64+0xcc/0x370 [ 82.593986][ T7967] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 82.599861][ T7967] RIP: 0033:0x47c530 [ 82.603745][ T7967] 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 [ 82.623331][ T7967] RSP: 002b:000000c4204f3810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 82.631725][ T7967] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 82.639678][ T7967] RDX: 0000000000001000 RSI: 000000c420310000 RDI: 0000000000000003 [ 82.647642][ T7967] RBP: 000000c4204f3868 R08: 0000000000000000 R09: 0000000000000000 [ 82.655595][ T7967] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000040 [ 82.663635][ T7967] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 82.673054][ T7967] Kernel Offset: disabled [ 82.677403][ T7967] Rebooting in 86400 seconds..