Warning: Permanently added '10.128.0.118' (ECDSA) to the list of known hosts. 2020/04/15 08:13:09 fuzzer started 2020/04/15 08:13:11 dialing manager at 10.128.0.105:44371 2020/04/15 08:13:11 syscalls: 2957 2020/04/15 08:13:11 code coverage: enabled 2020/04/15 08:13:11 comparison tracing: enabled 2020/04/15 08:13:11 extra coverage: enabled 2020/04/15 08:13:11 setuid sandbox: enabled 2020/04/15 08:13:11 namespace sandbox: enabled 2020/04/15 08:13:11 Android sandbox: /sys/fs/selinux/policy does not exist 2020/04/15 08:13:11 fault injection: enabled 2020/04/15 08:13:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/04/15 08:13:11 net packet injection: enabled 2020/04/15 08:13:11 net device setup: enabled 2020/04/15 08:13:11 concurrency sanitizer: enabled 2020/04/15 08:13:11 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/04/15 08:13:11 USB emulation: /dev/raw-gadget does not exist syzkaller login: [ 57.794512][ T7846] KCSAN: could not find function: 'poll_schedule_timeout' [ 60.033427][ T7846] KCSAN: could not find function: '_find_next_bit' 2020/04/15 08:13:18 adding functions to KCSAN blacklist: 'list_lru_count_one' 'lru_add_drain_all' 'do_nanosleep' 'poll_schedule_timeout' 'blk_mq_sched_dispatch_requests' 'tick_nohz_next_event' 'generic_write_end' 'copy_process' 'blk_mq_dispatch_rq_list' 'run_timer_softirq' 'kauditd_thread' 'ext4_setattr' 'get_cpu_iowait_time_us' '__ext4_new_inode' '__mark_inode_dirty' '__snd_rawmidi_transmit_ack' '__find_get_block' 'do_wait' 'install_new_memslots' 'tick_nohz_idle_stop_tick' 'blk_mq_get_request' 'do_signal_stop' 'snd_seq_check_queue' 'atime_needs_update' '_find_next_bit' 'generic_fillattr' 'wbt_issue' 'bpf_lru_pop_free' 'ext4_free_inodes_count' 'do_syslog' 'ktime_get_real_seconds' 'find_get_pages_range_tag' 'echo_char' 'xas_clear_mark' 'shmem_add_to_page_cache' 'ext4_has_free_clusters' 'kcm_rfree' '__delete_from_page_cache' 'tick_sched_do_timer' 'dput' 'ext4_nonda_switch' 'page_counter_charge' 'add_timer' 'smpboot_thread_fn' 'mod_timer' 'lruvec_lru_size' 'snd_seq_prioq_cell_out' 'ep_poll' 'direct_page_fault' '__bpf_lru_node_move_in' 'dd_has_work' 'audit_log_start' 'ext4_writepages' 'n_tty_receive_buf_common' '__add_to_page_cache_locked' 'pcpu_alloc' 'page_counter_try_charge' 'generic_file_read_iter' 'shmem_getpage_gfp' 'ext4_mark_iloc_dirty' 'xas_find_marked' [ 70.009436][ T7835] ================================================================== [ 70.017601][ T7835] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 70.025484][ T7835] [ 70.027819][ T7835] write to 0xffffffff86d972c8 of 280 bytes by interrupt on cpu 1: [ 70.035670][ T7835] timekeeping_advance+0x88e/0xd80 [ 70.040772][ T7835] update_wall_time+0x15/0x20 [ 70.045431][ T7835] tick_do_update_jiffies64+0x1e5/0x2a0 [ 70.051011][ T7835] tick_sched_do_timer+0xc7/0xd0 [ 70.055929][ T7835] tick_sched_timer+0x3f/0xd0 [ 70.060670][ T7835] __hrtimer_run_queues+0x271/0x600 [ 70.065849][ T7835] hrtimer_interrupt+0x226/0x490 [ 70.070789][ T7835] smp_apic_timer_interrupt+0xd8/0x270 [ 70.076236][ T7835] apic_timer_interrupt+0xf/0x20 [ 70.081246][ T7835] kcsan_setup_watchpoint+0x25a/0x440 [ 70.086611][ T7835] ipt_do_table+0x706/0xe70 [ 70.091109][ T7835] iptable_security_hook+0x44/0x60 [ 70.096205][ T7835] nf_hook_slow+0x7c/0x160 [ 70.100632][ T7835] ip_local_deliver+0x1f2/0x220 [ 70.105521][ T7835] ip_sublist_rcv_finish+0xf0/0x140 [ 70.110707][ T7835] ip_sublist_rcv+0x3f8/0x530 [ 70.115368][ T7835] ip_list_rcv+0x2f3/0x321 [ 70.119866][ T7835] __netif_receive_skb_list_core+0x368/0x5c0 [ 70.125827][ T7835] netif_receive_skb_list_internal+0x5c7/0x810 [ 70.131972][ T7835] gro_normal_list.part.0+0x37/0xa0 [ 70.137167][ T7835] gro_normal_one+0x14c/0x160 [ 70.141831][ T7835] napi_gro_receive+0x27d/0x2f0 [ 70.146679][ T7835] receive_buf+0x24e/0x2e20 [ 70.151265][ T7835] virtnet_poll+0x343/0x790 [ 70.155809][ T7835] net_rx_action+0x3ad/0xac0 [ 70.160417][ T7835] __do_softirq+0x118/0x34a [ 70.165157][ T7835] run_ksoftirqd+0x41/0x60 [ 70.169559][ T7835] smpboot_thread_fn+0x374/0x4a0 [ 70.174480][ T7835] kthread+0x1cb/0x1f0 [ 70.178544][ T7835] ret_from_fork+0x1f/0x30 [ 70.183211][ T7835] [ 70.185534][ T7835] read to 0xffffffff86d97340 of 8 bytes by task 7835 on cpu 0: [ 70.193075][ T7835] ktime_get_seconds+0x42/0x60 [ 70.197977][ T7835] tcp_rcv_established+0xe79/0xee0 [ 70.203232][ T7835] tcp_v4_do_rcv+0x396/0x4f0 [ 70.208080][ T7835] __release_sock+0x130/0x1e0 [ 70.212744][ T7835] release_sock+0x5e/0x160 [ 70.217160][ T7835] tcp_recvmsg+0x68f/0x1cc0 [ 70.221655][ T7835] inet_recvmsg+0xc1/0x250 [ 70.226080][ T7835] sock_recvmsg+0x8e/0xb0 [ 70.231002][ T7835] sock_read_iter+0x185/0x230 [ 70.235669][ T7835] new_sync_read+0x416/0x450 [ 70.240238][ T7835] __vfs_read+0x9e/0xb0 [ 70.244372][ T7835] vfs_read+0x13e/0x2b0 [ 70.248548][ T7835] ksys_read+0x16a/0x1a0 [ 70.252773][ T7835] __x64_sys_read+0x49/0x60 [ 70.257278][ T7835] do_syscall_64+0xc7/0x390 [ 70.261776][ T7835] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.267640][ T7835] [ 70.269952][ T7835] Reported by Kernel Concurrency Sanitizer on: [ 70.276143][ T7835] CPU: 0 PID: 7835 Comm: syz-fuzzer Not tainted 5.6.0-rc1-syzkaller #0 [ 70.284692][ T7835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.295189][ T7835] ================================================================== [ 70.303412][ T7835] Kernel panic - not syncing: panic_on_warn set ... [ 70.310071][ T7835] CPU: 0 PID: 7835 Comm: syz-fuzzer Not tainted 5.6.0-rc1-syzkaller #0 [ 70.318672][ T7835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.330030][ T7835] Call Trace: [ 70.333318][ T7835] dump_stack+0x11d/0x187 [ 70.337644][ T7835] panic+0x210/0x640 [ 70.341538][ T7835] ? vprintk_func+0x89/0x13a [ 70.346137][ T7835] kcsan_report.cold+0xc/0xf [ 70.350834][ T7835] kcsan_setup_watchpoint+0x3fb/0x440 [ 70.356213][ T7835] ktime_get_seconds+0x42/0x60 [ 70.361356][ T7835] tcp_rcv_established+0xe79/0xee0 [ 70.366538][ T7835] tcp_v4_do_rcv+0x396/0x4f0 [ 70.371249][ T7835] __release_sock+0x130/0x1e0 [ 70.375926][ T7835] release_sock+0x5e/0x160 [ 70.380465][ T7835] tcp_recvmsg+0x68f/0x1cc0 [ 70.384978][ T7835] inet_recvmsg+0xc1/0x250 [ 70.389403][ T7835] ? apparmor_socket_recvmsg+0x38/0x40 [ 70.395033][ T7835] ? inet_sendpage+0xf0/0xf0 [ 70.399810][ T7835] sock_recvmsg+0x8e/0xb0 [ 70.404242][ T7835] sock_read_iter+0x185/0x230 [ 70.408921][ T7835] new_sync_read+0x416/0x450 [ 70.413529][ T7835] __vfs_read+0x9e/0xb0 [ 70.417689][ T7835] vfs_read+0x13e/0x2b0 [ 70.421959][ T7835] ksys_read+0x16a/0x1a0 [ 70.426203][ T7835] __x64_sys_read+0x49/0x60 [ 70.430721][ T7835] do_syscall_64+0xc7/0x390 [ 70.435219][ T7835] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.441106][ T7835] RIP: 0033:0x47c530 [ 70.445160][ T7835] 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 [ 70.464807][ T7835] RSP: 002b:000000c42029d810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 70.473214][ T7835] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 70.481191][ T7835] RDX: 0000000000001000 RSI: 000000c420224000 RDI: 0000000000000003 [ 70.489378][ T7835] RBP: 000000c42029d868 R08: 0000000000000000 R09: 0000000000000000 [ 70.497482][ T7835] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000010 [ 70.505600][ T7835] R13: ffffffffffffffff R14: 0000000000000008 R15: ffffffffffffffff [ 70.515686][ T7835] Kernel Offset: disabled [ 70.520178][ T7835] Rebooting in 86400 seconds..