[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. 2020/06/16 02:22:26 fuzzer started 2020/06/16 02:22:27 dialing manager at 10.128.0.105:43759 2020/06/16 02:22:27 syscalls: 3085 2020/06/16 02:22:27 code coverage: enabled 2020/06/16 02:22:27 comparison tracing: enabled 2020/06/16 02:22:27 extra coverage: enabled 2020/06/16 02:22:27 setuid sandbox: enabled 2020/06/16 02:22:27 namespace sandbox: enabled 2020/06/16 02:22:27 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/16 02:22:27 fault injection: enabled 2020/06/16 02:22:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/16 02:22:27 net packet injection: enabled 2020/06/16 02:22:27 net device setup: enabled 2020/06/16 02:22:27 concurrency sanitizer: enabled 2020/06/16 02:22:27 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/16 02:22:27 USB emulation: enabled syzkaller login: [ 53.601885][ T8939] KCSAN: could not find function: 'poll_schedule_timeout' [ 54.653172][ T8939] KCSAN: could not find function: '_find_next_bit' 2020/06/16 02:22:33 suppressing KCSAN reports in functions: '__bforget' 'blk_mq_sched_dispatch_requests' 'blk_mq_dispatch_rq_list' 'page_counter_charge' 'n_tty_receive_buf_common' 'ext4_free_inodes_count' 'af_alg_sendpage' 'poll_schedule_timeout' '__ext4_new_inode' 'add_timer' 'generic_write_end' 'blk_mq_get_request' 'do_syslog' 'mod_timer' '_find_next_bit' 'tick_nohz_idle_stop_tick' 'generic_update_time' 'echo_char' 'file_update_time' 'do_nanosleep' '__splice_from_pipe' 'copy_process' 'ext4_mark_iloc_dirty' '__dev_queue_xmit' 'io_sq_thread' 'dd_has_work' 'run_timer_softirq' '__send_signal' 'kcm_rfree' 'xas_clear_mark' 'find_get_pages_range_tag' '__get_user_pages' 'iptunnel_xmit' 'tick_sched_do_timer' 'ep_poll' 'tick_nohz_next_event' 'kauditd_thread' 'ext4_ext_try_to_merge_right' 'futex_wait_queue_me' 'audit_log_start' 'generic_fillattr' [ 124.001023][ T8927] ================================================================== [ 124.009172][ T8927] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 124.017053][ T8927] [ 124.019398][ T8927] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 1: [ 124.027215][ T8927] timekeeping_advance+0x88e/0xd80 [ 124.032325][ T8927] update_wall_time+0x15/0x20 [ 124.037010][ T8927] tick_do_update_jiffies64+0x1e5/0x2a0 [ 124.042567][ T8927] tick_sched_do_timer+0xc7/0xd0 [ 124.047601][ T8927] tick_sched_timer+0x3f/0xd0 [ 124.052268][ T8927] __hrtimer_run_queues+0x271/0x600 [ 124.057450][ T8927] hrtimer_interrupt+0x226/0x490 [ 124.062388][ T8927] smp_apic_timer_interrupt+0xd8/0x270 [ 124.067869][ T8927] apic_timer_interrupt+0xf/0x20 [ 124.073364][ T8927] __sanitizer_cov_trace_switch+0x27/0x70 [ 124.079157][ T8927] __write_once_size+0x20/0x100 [ 124.084038][ T8927] __netif_receive_skb_list_core+0x1c9/0x5c0 [ 124.090011][ T8927] netif_receive_skb_list_internal+0x5c7/0x810 [ 124.096397][ T8927] gro_normal_list.part.0+0x37/0xa0 [ 124.101661][ T8927] gro_normal_one+0x14c/0x160 [ 124.106327][ T8927] napi_gro_receive+0x27d/0x2f0 [ 124.111165][ T8927] receive_buf+0x24c/0x3420 [ 124.115643][ T8927] virtnet_poll+0x343/0x790 [ 124.120126][ T8927] net_rx_action+0x3ad/0xac0 [ 124.124730][ T8927] __do_softirq+0x118/0x34a [ 124.129233][ T8927] run_ksoftirqd+0x41/0x60 [ 124.133647][ T8927] smpboot_thread_fn+0x374/0x4a0 [ 124.138841][ T8927] kthread+0x203/0x230 [ 124.143938][ T8927] ret_from_fork+0x1f/0x30 [ 124.148328][ T8927] [ 124.150663][ T8927] read to 0xffffffff88ae9140 of 8 bytes by task 8927 on cpu 0: [ 124.158674][ T8927] ktime_get_seconds+0x42/0x60 [ 124.163447][ T8927] tcp_rcv_established+0xe79/0xee0 [ 124.168542][ T8927] tcp_v4_do_rcv+0x396/0x4f0 [ 124.173115][ T8927] __release_sock+0x130/0x1e0 [ 124.177777][ T8927] release_sock+0x5e/0x160 [ 124.182263][ T8927] tcp_recvmsg+0x68e/0x1ba0 [ 124.186791][ T8927] inet_recvmsg+0xc1/0x250 [ 124.191214][ T8927] sock_recvmsg+0x8e/0xb0 [ 124.195537][ T8927] sock_read_iter+0x185/0x230 [ 124.200206][ T8927] new_sync_read+0x416/0x450 [ 124.205383][ T8927] __vfs_read+0x9e/0xb0 [ 124.209631][ T8927] vfs_read+0x13e/0x2b0 [ 124.213914][ T8927] ksys_read+0x16a/0x1a0 [ 124.218203][ T8927] __x64_sys_read+0x49/0x60 [ 124.222869][ T8927] do_syscall_64+0xc7/0x3b0 [ 124.227350][ T8927] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.234023][ T8927] [ 124.236342][ T8927] Reported by Kernel Concurrency Sanitizer on: [ 124.242561][ T8927] CPU: 0 PID: 8927 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 124.250786][ T8927] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.260962][ T8927] ================================================================== [ 124.269023][ T8927] Kernel panic - not syncing: panic_on_warn set ... [ 124.275594][ T8927] CPU: 0 PID: 8927 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 124.285010][ T8927] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.295276][ T8927] Call Trace: [ 124.298554][ T8927] dump_stack+0x11d/0x187 [ 124.302865][ T8927] panic+0x210/0x640 [ 124.306921][ T8927] ? vprintk_func+0x89/0x13a [ 124.311735][ T8927] kcsan_report.cold+0xc/0x1a [ 124.316687][ T8927] kcsan_setup_watchpoint+0x3fb/0x440 [ 124.322395][ T8927] ktime_get_seconds+0x42/0x60 [ 124.327240][ T8927] tcp_rcv_established+0xe79/0xee0 [ 124.332953][ T8927] tcp_v4_do_rcv+0x396/0x4f0 [ 124.337528][ T8927] __release_sock+0x130/0x1e0 [ 124.342186][ T8927] release_sock+0x5e/0x160 [ 124.346669][ T8927] tcp_recvmsg+0x68e/0x1ba0 [ 124.351218][ T8927] inet_recvmsg+0xc1/0x250 [ 124.355790][ T8927] ? apparmor_socket_recvmsg+0x38/0x40 [ 124.361313][ T8927] ? inet_sendpage+0xf0/0xf0 [ 124.365881][ T8927] sock_recvmsg+0x8e/0xb0 [ 124.370193][ T8927] sock_read_iter+0x185/0x230 [ 124.374863][ T8927] new_sync_read+0x416/0x450 [ 124.379447][ T8927] __vfs_read+0x9e/0xb0 [ 124.383591][ T8927] vfs_read+0x13e/0x2b0 [ 124.387824][ T8927] ksys_read+0x16a/0x1a0 [ 124.392247][ T8927] __x64_sys_read+0x49/0x60 [ 124.396739][ T8927] do_syscall_64+0xc7/0x3b0 [ 124.401246][ T8927] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.408080][ T8927] RIP: 0033:0x4b3cdb [ 124.412145][ T8927] 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 [ 124.432338][ T8927] RSP: 002b:000000c00036b890 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 124.440934][ T8927] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb [ 124.449357][ T8927] RDX: 0000000000001000 RSI: 000000c000300000 RDI: 0000000000000006 [ 124.457322][ T8927] RBP: 000000c00036b8e0 R08: 0000000000000001 R09: 0000000000000002 [ 124.465286][ T8927] R10: 0000000000005716 R11: 0000000000000206 R12: 0000000000006526 [ 124.473414][ T8927] R13: 0000000000000400 R14: 0000000000000040 R15: 0000000000000020 [ 124.483127][ T8927] Kernel Offset: disabled [ 124.487458][ T8927] Rebooting in 86400 seconds..