Warning: Permanently added '10.128.1.51' (ECDSA) to the list of known hosts. 2020/04/27 05:11:10 fuzzer started syzkaller login: [ 44.450160][ T6719] as (6719) used greatest stack depth: 10440 bytes left 2020/04/27 05:11:12 dialing manager at 10.128.0.105:35849 2020/04/27 05:11:12 syscalls: 2960 2020/04/27 05:11:12 code coverage: enabled 2020/04/27 05:11:12 comparison tracing: enabled 2020/04/27 05:11:12 extra coverage: enabled 2020/04/27 05:11:12 setuid sandbox: enabled 2020/04/27 05:11:12 namespace sandbox: enabled 2020/04/27 05:11:12 Android sandbox: /sys/fs/selinux/policy does not exist 2020/04/27 05:11:12 fault injection: enabled 2020/04/27 05:11:12 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/04/27 05:11:12 net packet injection: enabled 2020/04/27 05:11:12 net device setup: enabled 2020/04/27 05:11:12 concurrency sanitizer: enabled 2020/04/27 05:11:12 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/04/27 05:11:12 USB emulation: /dev/raw-gadget does not exist [ 47.237179][ T6727] KCSAN: could not find function: '_find_next_bit' [ 49.230253][ T6727] KCSAN: could not find function: 'poll_schedule_timeout' 2020/04/27 05:11:18 adding functions to KCSAN blacklist: 'blk_mq_sched_dispatch_requests' 'commit_echoes' 'hrtimer_interrupt' '__mark_inode_dirty' 'copy_process' 'ext4_mb_good_group' 'af_alg_sendmsg' 'audit_log_start' '__filemap_fdatawrite_range' 'get_signal' 'pipe_double_lock' 'page_counter_charge' 'blk_mq_get_request' 'dd_has_work' 'echo_char' 'mod_timer' 'generic_write_end' 'blk_mq_dispatch_rq_list' '_find_next_bit' 'ktime_get_real_seconds' 'do_signal_stop' '__add_to_page_cache_locked' 'do_nanosleep' '__x64_sys_ptrace' '__snd_rawmidi_transmit_ack' 'add_timer' 'ext4_free_inodes_count' 'tick_sched_do_timer' 'do_syslog' '__bpf_lru_node_move_in' 'find_get_pages_range_tag' 'run_timer_softirq' 'futex_wait_queue_me' '__rcu_read_unlock' '__delete_from_page_cache' 'n_tty_receive_char_special' 'poll_schedule_timeout' 'tick_nohz_idle_stop_tick' 'generic_fillattr' 'wbt_done' 'wbt_issue' 'blk_mq_request_bypass_insert' 'ep_poll' '__d_instantiate' 'ext4_mark_iloc_dirty' 'snd_seq_check_queue' 'io_sq_thread' 'n_tty_receive_buf_common' 'pcpu_alloc' 'xas_clear_mark' 'kauditd_thread' 'vm_area_dup' '__ext4_new_inode' 'do_exit' '__find_get_block' 'xas_find_marked' [ 147.002634][ T6712] ================================================================== [ 147.010792][ T6712] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 147.018670][ T6712] [ 147.020994][ T6712] write to 0xffffffff86fce8c8 of 280 bytes by interrupt on cpu 0: [ 147.028796][ T6712] timekeeping_advance+0x88e/0xd80 [ 147.033903][ T6712] update_wall_time+0x15/0x20 [ 147.038567][ T6712] tick_do_update_jiffies64+0x1e5/0x2a0 [ 147.044088][ T6712] tick_sched_do_timer+0xc7/0xd0 [ 147.049043][ T6712] tick_sched_timer+0x3f/0xd0 [ 147.053697][ T6712] __hrtimer_run_queues+0x271/0x600 [ 147.058868][ T6712] hrtimer_interrupt+0x226/0x490 [ 147.063785][ T6712] smp_apic_timer_interrupt+0xd8/0x270 [ 147.069220][ T6712] apic_timer_interrupt+0xf/0x20 [ 147.074185][ T6712] clear_page_erms+0x7/0x10 [ 147.078670][ T6712] kernel_init_free_pages+0x61/0xa0 [ 147.083841][ T6712] prep_new_page+0xa2/0xb0 [ 147.088230][ T6712] get_page_from_freelist+0x14ce/0x17c0 [ 147.093748][ T6712] __alloc_pages_nodemask+0x158/0x300 [ 147.099092][ T6712] alloc_pages_current+0xca/0x170 [ 147.104091][ T6712] skb_page_frag_refill+0x15e/0x250 [ 147.109264][ T6712] try_fill_recv+0x523/0xdb0 [ 147.113831][ T6712] virtnet_poll+0x62d/0x790 [ 147.118310][ T6712] net_rx_action+0x3ad/0xac0 [ 147.122874][ T6712] __do_softirq+0x118/0x34a [ 147.127394][ T6712] run_ksoftirqd+0x41/0x60 [ 147.131785][ T6712] smpboot_thread_fn+0x374/0x4a0 [ 147.136696][ T6712] kthread+0x203/0x230 [ 147.140736][ T6712] ret_from_fork+0x1f/0x30 [ 147.145117][ T6712] [ 147.147445][ T6712] read to 0xffffffff86fce940 of 8 bytes by task 6712 on cpu 1: [ 147.154959][ T6712] ktime_get_seconds+0x42/0x60 [ 147.159706][ T6712] tcp_rcv_established+0xe79/0xee0 [ 147.164789][ T6712] tcp_v4_do_rcv+0x396/0x4f0 [ 147.169358][ T6712] __release_sock+0x130/0x1e0 [ 147.174017][ T6712] release_sock+0x5e/0x160 [ 147.178406][ T6712] tcp_recvmsg+0x68e/0x1ba0 [ 147.182888][ T6712] inet_recvmsg+0xc1/0x250 [ 147.187277][ T6712] sock_recvmsg+0x8e/0xb0 [ 147.191580][ T6712] sock_read_iter+0x185/0x230 [ 147.196231][ T6712] new_sync_read+0x416/0x450 [ 147.200806][ T6712] __vfs_read+0x9e/0xb0 [ 147.204934][ T6712] vfs_read+0x13e/0x2b0 [ 147.209059][ T6712] ksys_read+0x16a/0x1a0 [ 147.213291][ T6712] __x64_sys_read+0x49/0x60 [ 147.217785][ T6712] do_syscall_64+0xc7/0x3b0 [ 147.222264][ T6712] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.228130][ T6712] [ 147.230429][ T6712] Reported by Kernel Concurrency Sanitizer on: [ 147.236571][ T6712] CPU: 1 PID: 6712 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 147.244779][ T6712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.254806][ T6712] ================================================================== [ 147.262859][ T6712] Kernel panic - not syncing: panic_on_warn set ... [ 147.269424][ T6712] CPU: 1 PID: 6712 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 147.277641][ T6712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.287677][ T6712] Call Trace: [ 147.290944][ T6712] dump_stack+0x11d/0x187 [ 147.295262][ T6712] panic+0x210/0x640 [ 147.299135][ T6712] ? vprintk_func+0x89/0x13a [ 147.303712][ T6712] kcsan_report.cold+0xc/0x1a [ 147.308375][ T6712] kcsan_setup_watchpoint+0x3fb/0x440 [ 147.313731][ T6712] ktime_get_seconds+0x42/0x60 [ 147.318476][ T6712] tcp_rcv_established+0xe79/0xee0 [ 147.323565][ T6712] tcp_v4_do_rcv+0x396/0x4f0 [ 147.328143][ T6712] __release_sock+0x130/0x1e0 [ 147.332796][ T6712] release_sock+0x5e/0x160 [ 147.337187][ T6712] tcp_recvmsg+0x68e/0x1ba0 [ 147.341671][ T6712] ? _raw_spin_unlock_irq+0x55/0x80 [ 147.346849][ T6712] inet_recvmsg+0xc1/0x250 [ 147.351246][ T6712] ? apparmor_socket_recvmsg+0x38/0x40 [ 147.356692][ T6712] ? inet_sendpage+0xf0/0xf0 [ 147.361269][ T6712] sock_recvmsg+0x8e/0xb0 [ 147.365576][ T6712] sock_read_iter+0x185/0x230 [ 147.370242][ T6712] new_sync_read+0x416/0x450 [ 147.374811][ T6712] __vfs_read+0x9e/0xb0 [ 147.378943][ T6712] vfs_read+0x13e/0x2b0 [ 147.383076][ T6712] ksys_read+0x16a/0x1a0 [ 147.387303][ T6712] __x64_sys_read+0x49/0x60 [ 147.391793][ T6712] do_syscall_64+0xc7/0x3b0 [ 147.396277][ T6712] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.402153][ T6712] RIP: 0033:0x47c530 [ 147.406028][ T6712] 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 [ 147.425610][ T6712] RSP: 002b:000000c420373810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 147.434044][ T6712] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 147.442001][ T6712] RDX: 0000000000001000 RSI: 000000c42032e000 RDI: 0000000000000003 [ 147.449968][ T6712] RBP: 000000c420373868 R08: 0000000000000000 R09: 0000000000000000 [ 147.460095][ T6712] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000100 [ 147.468043][ T6712] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 147.477202][ T6712] Kernel Offset: disabled [ 147.481528][ T6712] Rebooting in 86400 seconds..