[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. 2020/04/24 02:29:22 fuzzer started 2020/04/24 02:29:23 dialing manager at 10.128.0.105:45225 2020/04/24 02:29:24 syscalls: 2960 2020/04/24 02:29:24 code coverage: enabled 2020/04/24 02:29:24 comparison tracing: enabled 2020/04/24 02:29:24 extra coverage: enabled 2020/04/24 02:29:24 setuid sandbox: enabled 2020/04/24 02:29:24 namespace sandbox: enabled 2020/04/24 02:29:24 Android sandbox: /sys/fs/selinux/policy does not exist 2020/04/24 02:29:24 fault injection: enabled 2020/04/24 02:29:24 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/04/24 02:29:24 net packet injection: enabled 2020/04/24 02:29:24 net device setup: enabled 2020/04/24 02:29:24 concurrency sanitizer: enabled 2020/04/24 02:29:24 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/04/24 02:29:24 USB emulation: /dev/raw-gadget does not exist syzkaller login: [ 45.890781][ T6732] KCSAN: could not find function: 'do_ipv6_setsockopt' [ 47.114019][ T6732] KCSAN: could not find function: '_find_next_bit' [ 48.050166][ T6732] KCSAN: could not find function: 'poll_schedule_timeout' 2020/04/24 02:29:29 adding functions to KCSAN blacklist: 'vm_area_dup' 'find_get_pages_range_tag' 'xas_clear_mark' '__ext4_new_inode' 'wbt_done' 'bond_start_xmit' 'ext4_writepages' 'generic_write_end' 'run_timer_softirq' 'kauditd_thread' 'ext4_setattr' 'ep_poll' 'tick_sched_do_timer' 'blk_mq_dispatch_rq_list' '__mark_inode_dirty' 'get_cpu_idle_time_us' 'ext4_free_inodes_count' 'kvm_mmu_notifier_invalidate_range_end' 'do_ipv6_setsockopt' '__add_to_page_cache_locked' '__dev_queue_xmit' 'ext4_mark_iloc_dirty' 'blk_mq_get_request' 'add_timer' 'page_counter_charge' 'copy_process' '_find_next_bit' 'do_nanosleep' 'ktime_get_real_seconds' 'poll_schedule_timeout' 'filemap_map_pages' 'xas_find_marked' 'pcpu_alloc' 'io_sq_thread' 'do_exit' 'tick_nohz_idle_stop_tick' '__delete_from_page_cache' 'generic_fillattr' 'blk_mq_sched_dispatch_requests' 'fsnotify' '__x64_sys_ptrace' 'lruvec_lru_size' 'echo_char' 'do_signal_stop' 'mod_timer' 'audit_log_start' 'atime_needs_update' [ 143.995639][ T6734] ================================================================== [ 144.004046][ T6734] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 144.011918][ T6734] [ 144.014387][ T6734] write to 0xffffffff86fce8c8 of 280 bytes by interrupt on cpu 1: [ 144.022744][ T6734] timekeeping_advance+0x88e/0xd80 [ 144.028011][ T6734] update_wall_time+0x15/0x20 [ 144.032680][ T6734] tick_do_update_jiffies64+0x1e5/0x2a0 [ 144.038201][ T6734] tick_sched_do_timer+0xc7/0xd0 [ 144.043114][ T6734] tick_sched_timer+0x3f/0xd0 [ 144.047768][ T6734] __hrtimer_run_queues+0x271/0x600 [ 144.053063][ T6734] hrtimer_interrupt+0x226/0x490 [ 144.057994][ T6734] smp_apic_timer_interrupt+0xd8/0x270 [ 144.063430][ T6734] apic_timer_interrupt+0xf/0x20 [ 144.068411][ T6734] __tsan_read8+0x8a/0x110 [ 144.072825][ T6734] nf_ct_get_tuple+0x35e/0x4a0 [ 144.077569][ T6734] nf_conntrack_in+0x238/0xa60 [ 144.082488][ T6734] ipv4_conntrack_in+0x23/0x40 [ 144.087265][ T6734] nf_hook_slow+0x7c/0x160 [ 144.091676][ T6734] nf_hook_slow_list+0x140/0x29f [ 144.096609][ T6734] ip_sublist_rcv+0x4f9/0x530 [ 144.101280][ T6734] ip_list_rcv+0x2f3/0x321 [ 144.105692][ T6734] __netif_receive_skb_list_core+0x368/0x5c0 [ 144.111658][ T6734] netif_receive_skb_list_internal+0x5c7/0x810 [ 144.117787][ T6734] gro_normal_list.part.0+0x37/0xa0 [ 144.122972][ T6734] gro_normal_one+0x14c/0x160 [ 144.127713][ T6734] napi_gro_receive+0x27d/0x2f0 [ 144.132544][ T6734] receive_buf+0x252/0x2ed0 [ 144.137023][ T6734] virtnet_poll+0x343/0x790 [ 144.141512][ T6734] net_rx_action+0x3ad/0xac0 [ 144.146089][ T6734] __do_softirq+0x118/0x34a [ 144.150667][ T6734] run_ksoftirqd+0x41/0x60 [ 144.155070][ T6734] smpboot_thread_fn+0x374/0x4a0 [ 144.159994][ T6734] kthread+0x203/0x230 [ 144.164037][ T6734] ret_from_fork+0x1f/0x30 [ 144.168418][ T6734] [ 144.170751][ T6734] read to 0xffffffff86fce940 of 8 bytes by task 6734 on cpu 0: [ 144.178267][ T6734] ktime_get_seconds+0x42/0x60 [ 144.183006][ T6734] tcp_rcv_established+0xe79/0xee0 [ 144.188110][ T6734] tcp_v4_do_rcv+0x396/0x4f0 [ 144.192689][ T6734] __release_sock+0x130/0x1e0 [ 144.197339][ T6734] release_sock+0x5e/0x160 [ 144.201753][ T6734] tcp_recvmsg+0x68e/0x1ba0 [ 144.206233][ T6734] inet_recvmsg+0xc1/0x250 [ 144.210632][ T6734] sock_recvmsg+0x8e/0xb0 [ 144.214948][ T6734] sock_read_iter+0x185/0x230 [ 144.219617][ T6734] new_sync_read+0x416/0x450 [ 144.224190][ T6734] __vfs_read+0x9e/0xb0 [ 144.228325][ T6734] vfs_read+0x13e/0x2b0 [ 144.232541][ T6734] ksys_read+0x16a/0x1a0 [ 144.236806][ T6734] __x64_sys_read+0x49/0x60 [ 144.241307][ T6734] do_syscall_64+0xc7/0x3b0 [ 144.245818][ T6734] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 144.252661][ T6734] [ 144.254963][ T6734] Reported by Kernel Concurrency Sanitizer on: [ 144.261096][ T6734] CPU: 0 PID: 6734 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 144.269323][ T6734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.280054][ T6734] ================================================================== [ 144.288168][ T6734] Kernel panic - not syncing: panic_on_warn set ... [ 144.294940][ T6734] CPU: 0 PID: 6734 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 144.303413][ T6734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.313965][ T6734] Call Trace: [ 144.317248][ T6734] dump_stack+0x11d/0x187 [ 144.321567][ T6734] panic+0x210/0x640 [ 144.325615][ T6734] ? vprintk_func+0x89/0x13a [ 144.330188][ T6734] kcsan_report.cold+0xc/0x1a [ 144.334859][ T6734] kcsan_setup_watchpoint+0x3fb/0x440 [ 144.340493][ T6734] ktime_get_seconds+0x42/0x60 [ 144.345306][ T6734] tcp_rcv_established+0xe79/0xee0 [ 144.350415][ T6734] tcp_v4_do_rcv+0x396/0x4f0 [ 144.355431][ T6734] __release_sock+0x130/0x1e0 [ 144.360361][ T6734] release_sock+0x5e/0x160 [ 144.365037][ T6734] tcp_recvmsg+0x68e/0x1ba0 [ 144.369535][ T6734] ? sock_poll+0xfc/0x240 [ 144.373855][ T6734] inet_recvmsg+0xc1/0x250 [ 144.378265][ T6734] ? apparmor_socket_recvmsg+0x38/0x40 [ 144.383733][ T6734] ? inet_sendpage+0xf0/0xf0 [ 144.388313][ T6734] sock_recvmsg+0x8e/0xb0 [ 144.392621][ T6734] sock_read_iter+0x185/0x230 [ 144.397277][ T6734] new_sync_read+0x416/0x450 [ 144.401849][ T6734] __vfs_read+0x9e/0xb0 [ 144.406331][ T6734] vfs_read+0x13e/0x2b0 [ 144.410464][ T6734] ksys_read+0x16a/0x1a0 [ 144.414684][ T6734] __x64_sys_read+0x49/0x60 [ 144.419443][ T6734] do_syscall_64+0xc7/0x3b0 [ 144.424891][ T6734] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 144.430949][ T6734] RIP: 0033:0x47c530 [ 144.434830][ T6734] 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 [ 144.455058][ T6734] RSP: 002b:000000c4205d5810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 144.463719][ T6734] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 144.471946][ T6734] RDX: 0000000000001000 RSI: 000000c4201fc000 RDI: 0000000000000003 [ 144.480515][ T6734] RBP: 000000c4205d5868 R08: 0000000000000000 R09: 0000000000000000 [ 144.488468][ T6734] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003 [ 144.496428][ T6734] R13: 000000c42e4b7808 R14: 0000000000000002 R15: ffffffffffffffff [ 144.505873][ T6734] Kernel Offset: disabled [ 144.510375][ T6734] Rebooting in 86400 seconds..