[ 56.499018][ T25] audit: type=1800 audit(1573582413.069:27): pid=7497 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 56.571533][ T25] audit: type=1800 audit(1573582413.189:28): pid=7497 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. [ 57.461226][ T25] audit: type=1800 audit(1573582414.079:29): pid=7497 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 [ 57.489018][ T25] audit: type=1800 audit(1573582414.079:30): pid=7497 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 '10.128.0.102' (ECDSA) to the list of known hosts. 2019/11/12 18:13:44 fuzzer started 2019/11/12 18:13:46 dialing manager at 10.128.0.105:45453 2019/11/12 18:13:46 syscalls: 2566 2019/11/12 18:13:46 code coverage: enabled 2019/11/12 18:13:46 comparison tracing: enabled 2019/11/12 18:13:46 extra coverage: extra coverage is not supported by the kernel 2019/11/12 18:13:46 setuid sandbox: enabled 2019/11/12 18:13:46 namespace sandbox: enabled 2019/11/12 18:13:46 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/12 18:13:46 fault injection: enabled 2019/11/12 18:13:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/12 18:13:46 net packet injection: enabled 2019/11/12 18:13:46 net device setup: enabled 2019/11/12 18:13:46 concurrency sanitizer: enabled 2019/11/12 18:13:46 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 70.668002][ T7668] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/12 18:14:00 adding functions to KCSAN blacklist: 'dd_has_work' 'poll_schedule_timeout' 'do_signal_stop' 'sit_tunnel_xmit' 'clean_buffers' 'find_next_bit' 'taskstats_exit' 'xas_clear_mark' 'blk_mq_sched_dispatch_requests' 'tick_nohz_idle_stop_tick' 'rq_depth_scale_up' 'snd_seq_prioq_cell_out' '__hrtimer_run_queues' 'blk_mq_dispatch_rq_list' 'echo_char' 'wbt_issue' 'ext4_free_inodes_count' 'rcu_gp_fqs_check_wake' 'pcpu_alloc' 'smpboot_thread_fn' '__find_get_block' '__acct_update_integrals' 'mod_timer' 'blk_mq_get_request' 'copy_process' 'wbc_detach_inode' 'free_pid' '__delete_from_page_cache' 'add_timer' 'generic_fillattr' 'ext4_nonda_switch' 'kernfs_refresh_inode' 'list_lru_count_one' 'ext4_es_lookup_extent' 'find_alive_thread' 'blk_mq_run_hw_queue' 'vti_tunnel_xmit' 'vfs_fsync_range' 'find_get_pages_range_tag' 'kauditd_thread' 'generic_write_end' '__perf_event_overflow' 'ep_poll' 'vm_area_dup' 'blk_mq_free_request' 'tick_do_update_jiffies64' 'process_srcu' 'do_syslog' 'audit_log_start' 'mem_cgroup_select_victim_node' 'do_exit' '__d_lookup_done' 'timer_clear_idle' 'snd_seq_check_queue' '__mark_inode_dirty' 'inactive_list_is_low' 'snd_rawmidi_kernel_write1' 'tomoyo_supervisor' 'pipe_poll' '__ext4_new_inode' 'do_nanosleep' 'icmp_global_allow' 'p9_poll_workfn' 'futex_wait_queue_me' 'kvm_mmu_notifier_invalidate_range_end' 'ext4_mark_iloc_dirty' 'lruvec_lru_size' 'pipe_wait' 'mm_update_next_owner' 'n_tty_receive_buf_common' 'common_perm_cond' 'generic_file_read_iter' 'pid_update_inode' '__add_to_page_cache_locked' 'xas_find_marked' 'exit_signals' 'tcp_add_backlog' 'ksys_read' 'atime_needs_update' 'commit_echoes' 'run_timer_softirq' 'ext4_free_inode' '__wb_update_bandwidth' '__skb_try_recv_from_queue' 'ktime_get_real_seconds' 'dput' 'tick_sched_do_timer' 'ext4_has_free_clusters' 'p9_client_cb' 'virtqueue_disable_cb' [ 232.019059][ T7665] ================================================================== [ 232.028258][ T7665] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 232.036135][ T7665] [ 232.038458][ T7665] write to 0xffffffff86044b08 of 280 bytes by interrupt on cpu 1: [ 232.046251][ T7665] timekeeping_advance+0x88e/0xd80 [ 232.051428][ T7665] update_wall_time+0x19/0x20 [ 232.056085][ T7665] tick_do_update_jiffies64+0x1a4/0x250 [ 232.061612][ T7665] tick_sched_do_timer+0xd4/0xe0 [ 232.066533][ T7665] tick_sched_timer+0x43/0xe0 [ 232.071279][ T7665] __hrtimer_run_queues+0x274/0x5f0 [ 232.076453][ T7665] hrtimer_interrupt+0x22a/0x480 [ 232.081397][ T7665] smp_apic_timer_interrupt+0xdc/0x280 [ 232.086846][ T7665] apic_timer_interrupt+0xf/0x20 [ 232.091769][ T7665] clear_page_erms+0x7/0x10 [ 232.096331][ T7665] prep_new_page+0xae/0xb0 [ 232.100734][ T7665] get_page_from_freelist+0x139e/0x1650 [ 232.106265][ T7665] __alloc_pages_nodemask+0x15f/0x310 [ 232.111654][ T7665] alloc_pages_current+0xd1/0x170 [ 232.116863][ T7665] skb_page_frag_refill+0x16f/0x260 [ 232.122049][ T7665] try_fill_recv+0x510/0xda0 [ 232.126633][ T7665] virtnet_poll+0x64c/0x7d0 [ 232.131122][ T7665] net_rx_action+0x3ae/0xa90 [ 232.135783][ T7665] __do_softirq+0x115/0x33f [ 232.140268][ T7665] run_ksoftirqd+0x46/0x60 [ 232.144664][ T7665] smpboot_thread_fn+0x37d/0x4a0 [ 232.149580][ T7665] kthread+0x1d4/0x200 [ 232.153637][ T7665] ret_from_fork+0x1f/0x30 [ 232.158025][ T7665] [ 232.160335][ T7665] read to 0xffffffff86044b80 of 8 bytes by task 7665 on cpu 0: [ 232.167887][ T7665] ktime_get_seconds+0x45/0x70 [ 232.172628][ T7665] tcp_rcv_established+0xeeb/0xf50 [ 232.177731][ T7665] tcp_v4_do_rcv+0x3b5/0x520 [ 232.182309][ T7665] __release_sock+0x135/0x1e0 [ 232.186963][ T7665] release_sock+0x61/0x160 [ 232.191381][ T7665] tcp_recvmsg+0x653/0x1b40 [ 232.195869][ T7665] inet_recvmsg+0xbb/0x250 [ 232.200272][ T7665] sock_recvmsg+0x92/0xb0 [ 232.204667][ T7665] sock_read_iter+0x15f/0x1e0 [ 232.209322][ T7665] new_sync_read+0x389/0x4f0 [ 232.213893][ T7665] __vfs_read+0xb1/0xc0 [ 232.218031][ T7665] vfs_read+0x143/0x2c0 [ 232.222163][ T7665] ksys_read+0xd5/0x1b0 [ 232.226306][ T7665] __x64_sys_read+0x4c/0x60 [ 232.230791][ T7665] do_syscall_64+0xcc/0x370 [ 232.235273][ T7665] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 232.241133][ T7665] [ 232.243449][ T7665] Reported by Kernel Concurrency Sanitizer on: [ 232.250864][ T7665] CPU: 0 PID: 7665 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 232.258299][ T7665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 232.268345][ T7665] ================================================================== [ 232.276398][ T7665] Kernel panic - not syncing: panic_on_warn set ... [ 232.282964][ T7665] CPU: 0 PID: 7665 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 232.290391][ T7665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 232.300434][ T7665] Call Trace: [ 232.303749][ T7665] dump_stack+0x11d/0x181 [ 232.308069][ T7665] panic+0x210/0x640 [ 232.311951][ T7665] ? vprintk_func+0x8d/0x140 [ 232.316637][ T7665] kcsan_report.cold+0xc/0x1a [ 232.321328][ T7665] kcsan_setup_watchpoint+0x3fe/0x460 [ 232.326685][ T7665] __tsan_read8+0xc6/0x100 [ 232.331097][ T7665] ktime_get_seconds+0x45/0x70 [ 232.335859][ T7665] tcp_rcv_established+0xeeb/0xf50 [ 232.340975][ T7665] ? ipv4_dst_check+0xc6/0xf0 [ 232.345654][ T7665] tcp_v4_do_rcv+0x3b5/0x520 [ 232.350234][ T7665] __release_sock+0x135/0x1e0 [ 232.354897][ T7665] release_sock+0x61/0x160 [ 232.359305][ T7665] tcp_recvmsg+0x653/0x1b40 [ 232.363812][ T7665] inet_recvmsg+0xbb/0x250 [ 232.368210][ T7665] ? apparmor_socket_recvmsg+0x3b/0x50 [ 232.373660][ T7665] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 232.379881][ T7665] ? security_socket_recvmsg+0x92/0xb0 [ 232.385327][ T7665] ? inet_sendpage+0x100/0x100 [ 232.390079][ T7665] sock_recvmsg+0x92/0xb0 [ 232.394387][ T7665] sock_read_iter+0x15f/0x1e0 [ 232.399047][ T7665] new_sync_read+0x389/0x4f0 [ 232.403638][ T7665] __vfs_read+0xb1/0xc0 [ 232.407773][ T7665] vfs_read+0x143/0x2c0 [ 232.411913][ T7665] ksys_read+0xd5/0x1b0 [ 232.416070][ T7665] __x64_sys_read+0x4c/0x60 [ 232.420571][ T7665] do_syscall_64+0xcc/0x370 [ 232.425076][ T7665] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 232.430955][ T7665] RIP: 0033:0x47c530 [ 232.434837][ T7665] 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 [ 232.454424][ T7665] RSP: 002b:000000c4202ef7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 232.462900][ T7665] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 232.470949][ T7665] RDX: 0000000000001000 RSI: 000000c4201e4000 RDI: 0000000000000003 [ 232.479407][ T7665] RBP: 000000c4202ef830 R08: 0000000000000000 R09: 0000000000000000 [ 232.487376][ T7665] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010 [ 232.495330][ T7665] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 232.504836][ T7665] Kernel Offset: disabled [ 232.509178][ T7665] Rebooting in 86400 seconds..