[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.210' (ECDSA) to the list of known hosts. 2020/05/17 23:28:35 fuzzer started 2020/05/17 23:28:35 dialing manager at 10.128.0.105:43791 2020/05/17 23:28:36 syscalls: 3055 2020/05/17 23:28:36 code coverage: enabled 2020/05/17 23:28:36 comparison tracing: enabled 2020/05/17 23:28:36 extra coverage: enabled 2020/05/17 23:28:36 setuid sandbox: enabled 2020/05/17 23:28:36 namespace sandbox: enabled 2020/05/17 23:28:36 Android sandbox: /sys/fs/selinux/policy does not exist 2020/05/17 23:28:36 fault injection: enabled 2020/05/17 23:28:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/05/17 23:28:36 net packet injection: enabled 2020/05/17 23:28:36 net device setup: enabled 2020/05/17 23:28:36 concurrency sanitizer: enabled 2020/05/17 23:28:36 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/05/17 23:28:36 USB emulation: enabled syzkaller login: [ 56.499571][ T8908] KCSAN: could not find function: 'fprop_reflect_period_percpu' [ 58.800248][ T8908] KCSAN: could not find function: '_find_next_bit' [ 60.905263][ T8908] KCSAN: could not find function: 'poll_schedule_timeout' 2020/05/17 23:28:46 adding functions to KCSAN blacklist: 'dd_has_work' 'futex_wait_queue_me' 'snd_seq_check_queue' 'wg_packet_send_staged_packets' 'audit_log_start' 'ion_page_pool_remove' 'kcm_rfree' 'pcpu_alloc' 'shmem_add_to_page_cache' 'ion_heap_deferred_free' 'copy_process' 'do_exit' 'atime_needs_update' '__alloc_fd' 'vm_area_dup' '__perf_event_overflow' 'tick_sched_do_timer' 'ep_poll' 'blk_mq_sched_dispatch_requests' 'alloc_pid' 'ext4_writepages' 'shmem_getpage_gfp' 'do_wait' 'inode_sync_complete' 'add_timer' 'do_syslog' '__put_unused_fd' '__add_to_page_cache_locked' '__ext4_new_inode' 'kauditd_thread' '__mark_inode_dirty' 'fsnotify' 'ext4_setattr' 'page_counter_charge' 'ktime_get_real_seconds' '__filemap_fdatawrite_range' 'commit_echoes' 'generic_fillattr' 'do_signal_stop' 'ext4_free_inodes_count' 'list_lru_add' 'fprop_reflect_period_percpu' 'do_nanosleep' 'blk_mq_request_bypass_insert' 'xas_find_marked' 'decrypt_packet' 'mod_timer' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'fasync_remove_entry' 'io_sq_thread' '_find_next_bit' 'run_timer_softirq' 'n_tty_receive_buf_common' 'shmem_file_read_iter' 'ext4_mark_iloc_dirty' '__writeback_single_inode' '__snd_rawmidi_transmit_ack' 'install_new_memslots' 'xprt_connect' 'lruvec_lru_size' 'tick_nohz_idle_stop_tick' 'poll_schedule_timeout' 'emulator_read_write_onepage' 'iput' 'file_remove_privs' 'find_get_pages_range_tag' 'blk_mq_get_request' '__delete_from_page_cache' 'wbt_done' 'ondemand_readahead' 'filemap_fault' 'generic_write_end' 'echo_char' [ 296.992116][ T8898] ================================================================== [ 297.000264][ T8898] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 297.008211][ T8898] [ 297.010541][ T8898] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 1: [ 297.018421][ T8898] timekeeping_advance+0x88e/0xd80 [ 297.023507][ T8898] update_wall_time+0x15/0x20 [ 297.028308][ T8898] tick_do_update_jiffies64+0x1e5/0x2a0 [ 297.033935][ T8898] tick_sched_do_timer+0xc7/0xd0 [ 297.038872][ T8898] tick_sched_timer+0x3f/0xd0 [ 297.043600][ T8898] __hrtimer_run_queues+0x271/0x600 [ 297.049132][ T8898] hrtimer_interrupt+0x226/0x490 [ 297.054068][ T8898] smp_apic_timer_interrupt+0xd8/0x270 [ 297.059593][ T8898] apic_timer_interrupt+0xf/0x20 [ 297.064719][ T8898] __tsan_read1+0x5d/0x110 [ 297.069141][ T8898] tcp_v4_rcv+0x434/0x1e10 [ 297.073555][ T8898] ip_protocol_deliver_rcu+0x4b/0x410 [ 297.078908][ T8898] ip_local_deliver_finish+0xf3/0x120 [ 297.084516][ T8898] ip_local_deliver+0x135/0x220 [ 297.089376][ T8898] ip_sublist_rcv_finish+0xf0/0x140 [ 297.094733][ T8898] ip_sublist_rcv+0x3f8/0x530 [ 297.099387][ T8898] ip_list_rcv+0x2f3/0x321 [ 297.103869][ T8898] __netif_receive_skb_list_core+0x368/0x5c0 [ 297.109826][ T8898] netif_receive_skb_list_internal+0x5c7/0x810 [ 297.115958][ T8898] gro_normal_list.part.0+0x37/0xa0 [ 297.121150][ T8898] gro_normal_one+0x14c/0x160 [ 297.125811][ T8898] napi_gro_receive+0x27d/0x2f0 [ 297.130655][ T8898] receive_buf+0x24c/0x3420 [ 297.135136][ T8898] virtnet_poll+0x343/0x790 [ 297.139695][ T8898] net_rx_action+0x3ad/0xac0 [ 297.144371][ T8898] __do_softirq+0x118/0x34a [ 297.148854][ T8898] run_ksoftirqd+0x41/0x60 [ 297.153250][ T8898] smpboot_thread_fn+0x374/0x4a0 [ 297.158264][ T8898] kthread+0x203/0x230 [ 297.162343][ T8898] ret_from_fork+0x1f/0x30 [ 297.166738][ T8898] [ 297.169043][ T8898] read to 0xffffffff88ae9140 of 8 bytes by task 8898 on cpu 0: [ 297.176831][ T8898] ktime_get_seconds+0x42/0x60 [ 297.181591][ T8898] tcp_rcv_established+0xe79/0xee0 [ 297.187326][ T8898] tcp_v4_do_rcv+0x396/0x4f0 [ 297.191904][ T8898] __release_sock+0x130/0x1e0 [ 297.196567][ T8898] release_sock+0x5e/0x160 [ 297.201153][ T8898] tcp_recvmsg+0x68e/0x1ba0 [ 297.205652][ T8898] inet_recvmsg+0xc1/0x250 [ 297.210068][ T8898] sock_recvmsg+0x8e/0xb0 [ 297.214615][ T8898] sock_read_iter+0x185/0x230 [ 297.219296][ T8898] new_sync_read+0x416/0x450 [ 297.223973][ T8898] __vfs_read+0x9e/0xb0 [ 297.228218][ T8898] vfs_read+0x13e/0x2b0 [ 297.232359][ T8898] ksys_read+0x16a/0x1a0 [ 297.236587][ T8898] __x64_sys_read+0x49/0x60 [ 297.241166][ T8898] do_syscall_64+0xc7/0x3b0 [ 297.246608][ T8898] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 297.252657][ T8898] [ 297.254960][ T8898] Reported by Kernel Concurrency Sanitizer on: [ 297.261117][ T8898] CPU: 0 PID: 8898 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 297.269335][ T8898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 297.280327][ T8898] ================================================================== [ 297.288372][ T8898] Kernel panic - not syncing: panic_on_warn set ... [ 297.295823][ T8898] CPU: 0 PID: 8898 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 297.304372][ T8898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 297.314425][ T8898] Call Trace: [ 297.317701][ T8898] dump_stack+0x11d/0x187 [ 297.322011][ T8898] panic+0x210/0x640 [ 297.325904][ T8898] ? vprintk_func+0x89/0x13a [ 297.330483][ T8898] kcsan_report.cold+0xc/0x1a [ 297.335146][ T8898] kcsan_setup_watchpoint+0x3fb/0x440 [ 297.340517][ T8898] ktime_get_seconds+0x42/0x60 [ 297.345261][ T8898] tcp_rcv_established+0xe79/0xee0 [ 297.351747][ T8898] tcp_v4_do_rcv+0x396/0x4f0 [ 297.356501][ T8898] __release_sock+0x130/0x1e0 [ 297.361183][ T8898] release_sock+0x5e/0x160 [ 297.365591][ T8898] tcp_recvmsg+0x68e/0x1ba0 [ 297.370093][ T8898] inet_recvmsg+0xc1/0x250 [ 297.374504][ T8898] ? apparmor_socket_recvmsg+0x38/0x40 [ 297.379941][ T8898] ? inet_sendpage+0xf0/0xf0 [ 297.384510][ T8898] sock_recvmsg+0x8e/0xb0 [ 297.388822][ T8898] sock_read_iter+0x185/0x230 [ 297.393927][ T8898] new_sync_read+0x416/0x450 [ 297.398539][ T8898] __vfs_read+0x9e/0xb0 [ 297.403133][ T8898] vfs_read+0x13e/0x2b0 [ 297.407362][ T8898] ksys_read+0x16a/0x1a0 [ 297.411965][ T8898] __x64_sys_read+0x49/0x60 [ 297.416504][ T8898] do_syscall_64+0xc7/0x3b0 [ 297.421021][ T8898] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 297.426911][ T8898] RIP: 0033:0x47c530 [ 297.430808][ T8898] 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 [ 297.450403][ T8898] RSP: 002b:000000c4201fd7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 297.458791][ T8898] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 297.466760][ T8898] RDX: 0000000000001000 RSI: 000000c42021a000 RDI: 0000000000000003 [ 297.474748][ T8898] RBP: 000000c4201fd830 R08: 0000000000000000 R09: 0000000000000000 [ 297.482929][ T8898] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000008 [ 297.490884][ T8898] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 297.500582][ T8898] Kernel Offset: disabled [ 297.504917][ T8898] Rebooting in 86400 seconds..