[ 54.068553][ T26] audit: type=1800 audit(1573009806.345:27): pid=7902 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 54.090180][ T26] audit: type=1800 audit(1573009806.345:28): pid=7902 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. [ 55.210816][ T26] audit: type=1800 audit(1573009807.525:29): pid=7902 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 [ 55.230931][ T26] audit: type=1800 audit(1573009807.525:30): pid=7902 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 '10.128.0.250' (ECDSA) to the list of known hosts. 2019/11/06 03:10:14 fuzzer started 2019/11/06 03:10:16 dialing manager at 10.128.0.105:39303 2019/11/06 03:10:17 syscalls: 2553 2019/11/06 03:10:17 code coverage: enabled 2019/11/06 03:10:17 comparison tracing: enabled 2019/11/06 03:10:17 extra coverage: extra coverage is not supported by the kernel 2019/11/06 03:10:17 setuid sandbox: enabled 2019/11/06 03:10:17 namespace sandbox: enabled 2019/11/06 03:10:17 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/06 03:10:17 fault injection: enabled 2019/11/06 03:10:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/06 03:10:17 net packet injection: enabled 2019/11/06 03:10:17 net device setup: enabled 2019/11/06 03:10:17 concurrency sanitizer: enabled 2019/11/06 03:10:17 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/06 03:10:22 adding functions to KCSAN blacklist: 'task_dump_owner' 'ep_poll' 'blk_mq_get_request' 'tick_do_update_jiffies64' 'wbt_issue' 'xas_clear_mark' 'ktime_get_real_seconds' 'tomoyo_supervisor' 'mod_timer' '__ext4_new_inode' '__splice_from_pipe' '__hrtimer_run_queues' 'do_nanosleep' 'ext4_free_inodes_count' 'sit_tunnel_xmit' 'tick_sched_do_timer' 'blk_mq_sched_dispatch_requests' 'generic_write_end' 'tick_nohz_next_event' 'page_counter_try_charge' 'generic_permission' 'wbt_done' 'find_next_bit' 'rcu_gp_fqs_check_wake' 'blk_mq_dispatch_rq_list' 'ext4_free_inode' 'vm_area_dup' 'generic_fillattr' 'run_timer_softirq' 'tcp_add_backlog' 'ext4_has_free_clusters' 'find_get_pages_range_tag' 'poll_schedule_timeout' syzkaller login: [ 70.566124][ T8071] KCSAN: could not find function: 'poll_schedule_timeout' [ 87.675218][ T8073] ================================================================== [ 87.685490][ T8073] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 87.693378][ T8073] [ 87.695722][ T8073] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 0: [ 87.703537][ T8073] timekeeping_advance+0x88e/0xd80 [ 87.709408][ T8073] update_wall_time+0x19/0x20 [ 87.714147][ T8073] tick_do_update_jiffies64+0x1a4/0x250 [ 87.719678][ T8073] tick_sched_do_timer+0xd4/0xe0 [ 87.724731][ T8073] tick_sched_timer+0x43/0xe0 [ 87.729389][ T8073] __hrtimer_run_queues+0x274/0x5f0 [ 87.734568][ T8073] hrtimer_interrupt+0x22a/0x480 [ 87.739506][ T8073] smp_apic_timer_interrupt+0xdc/0x280 [ 87.744947][ T8073] apic_timer_interrupt+0xf/0x20 [ 87.749874][ T8073] __sanitizer_cov_trace_pc+0x0/0x50 [ 87.755141][ T8073] refcount_dec_and_test_checked+0x24/0x40 [ 87.760926][ T8073] sock_put+0x25/0x60 [ 87.764888][ T8073] tcp_v4_rcv+0x1a31/0x1bd0 [ 87.769387][ T8073] ip_protocol_deliver_rcu+0x4d/0x420 [ 87.774738][ T8073] ip_local_deliver_finish+0x110/0x140 [ 87.780190][ T8073] ip_local_deliver+0x133/0x210 [ 87.785020][ T8073] ip_rcv_finish+0x121/0x160 [ 87.789589][ T8073] ip_rcv+0x18f/0x1a0 [ 87.793557][ T8073] __netif_receive_skb_one_core+0xa7/0xe0 [ 87.799350][ T8073] __netif_receive_skb+0x37/0xf0 [ 87.804269][ T8073] netif_receive_skb_internal+0x59/0x190 [ 87.809905][ T8073] napi_gro_receive+0x28f/0x330 [ 87.815187][ T8073] receive_buf+0x284/0x30b0 [ 87.819674][ T8073] virtnet_poll+0x436/0x7d0 [ 87.824165][ T8073] net_rx_action+0x3ae/0xa90 [ 87.828761][ T8073] __do_softirq+0x115/0x33f [ 87.834019][ T8073] run_ksoftirqd+0x46/0x60 [ 87.838442][ T8073] smpboot_thread_fn+0x37d/0x4a0 [ 87.843749][ T8073] kthread+0x1d4/0x200 [ 87.847903][ T8073] ret_from_fork+0x1f/0x30 [ 87.852299][ T8073] [ 87.854877][ T8073] read to 0xffffffff86041b80 of 8 bytes by task 8073 on cpu 1: [ 87.863300][ T8073] ktime_get_seconds+0x45/0x70 [ 87.868063][ T8073] tcp_rcv_established+0xeeb/0xf50 [ 87.873159][ T8073] tcp_v4_do_rcv+0x3b5/0x520 [ 87.877734][ T8073] __release_sock+0x135/0x1e0 [ 87.882395][ T8073] release_sock+0x61/0x160 [ 87.887420][ T8073] tcp_recvmsg+0x653/0x1b40 [ 87.892709][ T8073] inet_recvmsg+0xbb/0x250 [ 87.897111][ T8073] sock_recvmsg+0x92/0xb0 [ 87.901510][ T8073] sock_read_iter+0x15f/0x1e0 [ 87.906169][ T8073] new_sync_read+0x389/0x4f0 [ 87.910867][ T8073] __vfs_read+0xb1/0xc0 [ 87.915011][ T8073] vfs_read+0x143/0x2c0 [ 87.919181][ T8073] ksys_read+0xd5/0x1b0 [ 87.923321][ T8073] __x64_sys_read+0x4c/0x60 [ 87.927809][ T8073] do_syscall_64+0xcc/0x370 [ 87.932297][ T8073] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 87.938161][ T8073] [ 87.940479][ T8073] Reported by Kernel Concurrency Sanitizer on: [ 87.947069][ T8073] CPU: 1 PID: 8073 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 87.954500][ T8073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.964545][ T8073] ================================================================== [ 87.972592][ T8073] Kernel panic - not syncing: panic_on_warn set ... [ 87.979161][ T8073] CPU: 1 PID: 8073 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 87.986592][ T8073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.996630][ T8073] Call Trace: [ 87.999906][ T8073] dump_stack+0xf5/0x159 [ 88.004857][ T8073] panic+0x210/0x640 [ 88.008738][ T8073] ? vprintk_func+0x8d/0x140 [ 88.013316][ T8073] kcsan_report.cold+0xc/0xe [ 88.017981][ T8073] kcsan_setup_watchpoint+0x3fe/0x410 [ 88.023349][ T8073] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 88.029053][ T8073] __tsan_read8+0x145/0x1f0 [ 88.033800][ T8073] ktime_get_seconds+0x45/0x70 [ 88.038639][ T8073] tcp_rcv_established+0xeeb/0xf50 [ 88.044019][ T8073] ? ipv4_dst_check+0xc6/0xf0 [ 88.048860][ T8073] tcp_v4_do_rcv+0x3b5/0x520 [ 88.053709][ T8073] __release_sock+0x135/0x1e0 [ 88.058381][ T8073] release_sock+0x61/0x160 [ 88.062785][ T8073] tcp_recvmsg+0x653/0x1b40 [ 88.067291][ T8073] inet_recvmsg+0xbb/0x250 [ 88.071693][ T8073] ? apparmor_socket_recvmsg+0x3b/0x50 [ 88.077140][ T8073] ? security_socket_recvmsg+0x92/0xb0 [ 88.082581][ T8073] ? inet_sendpage+0x100/0x100 [ 88.087330][ T8073] sock_recvmsg+0x92/0xb0 [ 88.091647][ T8073] sock_read_iter+0x15f/0x1e0 [ 88.096315][ T8073] new_sync_read+0x389/0x4f0 [ 88.100905][ T8073] __vfs_read+0xb1/0xc0 [ 88.105045][ T8073] vfs_read+0x143/0x2c0 [ 88.109184][ T8073] ksys_read+0xd5/0x1b0 [ 88.113323][ T8073] __x64_sys_read+0x4c/0x60 [ 88.117814][ T8073] do_syscall_64+0xcc/0x370 [ 88.122316][ T8073] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 88.128189][ T8073] RIP: 0033:0x47c530 [ 88.132071][ T8073] 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 [ 88.151656][ T8073] RSP: 002b:000000c4204e77d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 88.160048][ T8073] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 88.168098][ T8073] RDX: 0000000000001000 RSI: 000000c4203de000 RDI: 0000000000000003 [ 88.176058][ T8073] RBP: 000000c4204e7830 R08: 0000000000000000 R09: 0000000000000000 [ 88.184114][ T8073] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000100 [ 88.192078][ T8073] R13: ffffffffffffffff R14: 0000000000000020 R15: ffffffffffffffff [ 88.201317][ T8073] Kernel Offset: disabled [ 88.205654][ T8073] Rebooting in 86400 seconds..