[ 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 '10.128.0.109' (ECDSA) to the list of known hosts. 2020/06/02 20:26:08 fuzzer started 2020/06/02 20:26:08 dialing manager at 10.128.0.105:37135 2020/06/02 20:26:08 syscalls: 3055 2020/06/02 20:26:08 code coverage: enabled 2020/06/02 20:26:08 comparison tracing: enabled 2020/06/02 20:26:08 extra coverage: enabled 2020/06/02 20:26:08 setuid sandbox: enabled 2020/06/02 20:26:08 namespace sandbox: enabled 2020/06/02 20:26:08 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/02 20:26:08 fault injection: enabled 2020/06/02 20:26:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/02 20:26:08 net packet injection: enabled 2020/06/02 20:26:08 net device setup: enabled 2020/06/02 20:26:08 concurrency sanitizer: enabled 2020/06/02 20:26:08 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/02 20:26:08 USB emulation: enabled syzkaller login: [ 53.488888][ T8918] KCSAN: could not find function: '__bpf_lru_list_rotate_inactive' [ 56.272392][ T8918] KCSAN: could not find function: '_find_next_bit' 2020/06/02 20:26:14 adding functions to KCSAN blacklist: '__send_signal' 'page_counter_charge' 'ext4_free_inodes_count' 'do_exit' 'find_get_pages_range_tag' 'xas_clear_mark' 'futex_wait_queue_me' '__snd_rawmidi_transmit_ack' '__lru_cache_add' 'ktime_get_real_seconds' 'dd_has_work' 'shmem_file_read_iter' 'generic_update_time' 'decrypt_packet' '__bpf_lru_list_rotate_inactive' '__bpf_lru_node_move_in' 'generic_fillattr' 'do_syslog' '__mark_inode_dirty' 'echo_char' 'blk_mq_get_request' '__add_to_page_cache_locked' 'tick_nohz_idle_stop_tick' 'blk_mq_sched_dispatch_requests' 'add_timer' '__filemap_fdatawrite_range' 'kauditd_thread' 'copy_process' 'shmem_getpage_gfp' 'wbt_done' '__x64_sys_ptrace' 'pcpu_alloc' 'ext4_mark_iloc_dirty' 'ep_poll' '__ext4_new_inode' 'n_tty_receive_buf_common' 'tick_nohz_next_event' 'xas_find_marked' 'blk_mq_dispatch_rq_list' '_find_next_bit' 'mod_timer' 'generic_write_end' 'do_nanosleep' 'run_timer_softirq' 'tick_sched_do_timer' [ 79.014961][ T8909] ================================================================== [ 79.023089][ T8909] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 79.031053][ T8909] [ 79.033365][ T8909] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 1: [ 79.041202][ T8909] timekeeping_advance+0x88e/0xd80 [ 79.046309][ T8909] update_wall_time+0x15/0x20 [ 79.051094][ T8909] tick_do_update_jiffies64+0x1e5/0x2a0 [ 79.056619][ T8909] tick_sched_do_timer+0xc7/0xd0 [ 79.061531][ T8909] tick_sched_timer+0x3f/0xd0 [ 79.066197][ T8909] __hrtimer_run_queues+0x271/0x600 [ 79.071381][ T8909] hrtimer_interrupt+0x226/0x490 [ 79.076308][ T8909] smp_apic_timer_interrupt+0xd8/0x270 [ 79.081743][ T8909] apic_timer_interrupt+0xf/0x20 [ 79.086668][ T8909] __list_del_entry_valid+0x83/0x8e [ 79.091843][ T8909] nf_hook_slow_list+0xc2/0x29f [ 79.096667][ T8909] ip_sublist_rcv+0x4f9/0x530 [ 79.101316][ T8909] ip_list_rcv+0x2f3/0x321 [ 79.105723][ T8909] __netif_receive_skb_list_core+0x368/0x5c0 [ 79.111679][ T8909] netif_receive_skb_list_internal+0x5c7/0x810 [ 79.117808][ T8909] gro_normal_list.part.0+0x37/0xa0 [ 79.122987][ T8909] gro_normal_one+0x14c/0x160 [ 79.127642][ T8909] napi_gro_receive+0x27d/0x2f0 [ 79.132467][ T8909] receive_buf+0x24c/0x3420 [ 79.136954][ T8909] virtnet_poll+0x343/0x790 [ 79.141431][ T8909] net_rx_action+0x3ad/0xac0 [ 79.145997][ T8909] __do_softirq+0x118/0x34a [ 79.150471][ T8909] run_ksoftirqd+0x41/0x60 [ 79.154868][ T8909] smpboot_thread_fn+0x374/0x4a0 [ 79.159797][ T8909] kthread+0x203/0x230 [ 79.163840][ T8909] ret_from_fork+0x1f/0x30 [ 79.168221][ T8909] [ 79.170541][ T8909] read to 0xffffffff88ae9140 of 8 bytes by task 8909 on cpu 0: [ 79.178055][ T8909] ktime_get_seconds+0x42/0x60 [ 79.182793][ T8909] tcp_rcv_established+0xe79/0xee0 [ 79.187886][ T8909] tcp_v4_do_rcv+0x396/0x4f0 [ 79.192459][ T8909] __release_sock+0x130/0x1e0 [ 79.197208][ T8909] release_sock+0x5e/0x160 [ 79.201609][ T8909] tcp_recvmsg+0x68e/0x1ba0 [ 79.206091][ T8909] inet_recvmsg+0xc1/0x250 [ 79.210482][ T8909] sock_recvmsg+0x8e/0xb0 [ 79.214791][ T8909] sock_read_iter+0x185/0x230 [ 79.219443][ T8909] new_sync_read+0x416/0x450 [ 79.224009][ T8909] __vfs_read+0x9e/0xb0 [ 79.228146][ T8909] vfs_read+0x13e/0x2b0 [ 79.232316][ T8909] ksys_read+0x16a/0x1a0 [ 79.236533][ T8909] __x64_sys_read+0x49/0x60 [ 79.241106][ T8909] do_syscall_64+0xc7/0x3b0 [ 79.245599][ T8909] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 79.251462][ T8909] [ 79.253829][ T8909] Reported by Kernel Concurrency Sanitizer on: [ 79.259960][ T8909] CPU: 0 PID: 8909 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 79.268219][ T8909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.278288][ T8909] ================================================================== [ 79.286324][ T8909] Kernel panic - not syncing: panic_on_warn set ... [ 79.292888][ T8909] CPU: 0 PID: 8909 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 79.301093][ T8909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.311118][ T8909] Call Trace: [ 79.314388][ T8909] dump_stack+0x11d/0x187 [ 79.318698][ T8909] panic+0x210/0x640 [ 79.322570][ T8909] ? vprintk_func+0x89/0x13a [ 79.327137][ T8909] kcsan_report.cold+0xc/0x1a [ 79.331793][ T8909] kcsan_setup_watchpoint+0x3fb/0x440 [ 79.337146][ T8909] ktime_get_seconds+0x42/0x60 [ 79.341886][ T8909] tcp_rcv_established+0xe79/0xee0 [ 79.346992][ T8909] tcp_v4_do_rcv+0x396/0x4f0 [ 79.351571][ T8909] __release_sock+0x130/0x1e0 [ 79.356226][ T8909] release_sock+0x5e/0x160 [ 79.360618][ T8909] tcp_recvmsg+0x68e/0x1ba0 [ 79.365105][ T8909] inet_recvmsg+0xc1/0x250 [ 79.369599][ T8909] ? apparmor_socket_recvmsg+0x38/0x40 [ 79.375048][ T8909] ? inet_sendpage+0xf0/0xf0 [ 79.379623][ T8909] sock_recvmsg+0x8e/0xb0 [ 79.383930][ T8909] sock_read_iter+0x185/0x230 [ 79.388588][ T8909] new_sync_read+0x416/0x450 [ 79.393172][ T8909] __vfs_read+0x9e/0xb0 [ 79.397305][ T8909] vfs_read+0x13e/0x2b0 [ 79.401434][ T8909] ksys_read+0x16a/0x1a0 [ 79.405649][ T8909] __x64_sys_read+0x49/0x60 [ 79.410131][ T8909] do_syscall_64+0xc7/0x3b0 [ 79.414635][ T8909] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 79.420500][ T8909] RIP: 0033:0x4b3cdb [ 79.424383][ T8909] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 bb a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 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 [ 79.443960][ T8909] RSP: 002b:000000c0000e3890 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 79.452356][ T8909] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb [ 79.460317][ T8909] RDX: 0000000000001000 RSI: 000000c0000f4000 RDI: 0000000000000006 [ 79.468262][ T8909] RBP: 000000c0000e38e0 R08: 0000000000000001 R09: 0000000000000002 [ 79.476208][ T8909] R10: 00000000000050f7 R11: 0000000000000206 R12: 0000000000005b24 [ 79.484153][ T8909] R13: 0000000000000400 R14: 0000000000000004 R15: 0000000000000004 [ 79.493544][ T8909] Kernel Offset: disabled [ 79.497968][ T8909] Rebooting in 86400 seconds..