Warning: Permanently added '10.128.1.4' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   34.824594] ip_tables: iptables: counters copy to user failed while replacing table
[   34.837930] ------------[ cut here ]------------
[   34.842778] kernel BUG at net/core/dev.c:2648!
[   34.847633] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   34.853022] Modules linked in:
[   34.856219] CPU: 0 PID: 6341 Comm: syz-executor763 Not tainted 4.14.175-syzkaller #0
[   34.864097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.873448] task: ffff8880846780c0 task.stack: ffff888097cd8000
[   34.879508] RIP: 0010:skb_checksum_help+0x5fd/0x830
[   34.884603] RSP: 0018:ffff888097cdf468 EFLAGS: 00010297
[   34.889962] RAX: ffff8880846780c0 RBX: 00000000000000e0 RCX: 0000000000000120
[   34.897249] RDX: 0000000000000000 RSI: 000000000000001c RDI: 0000000000000000
[   34.904513] RBP: ffff88809dd2cb40 R08: ffff88809dd2cbc0 R09: 0000000000000000
[   34.911769] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809dd2cbc4
[   34.919023] R13: ffff88809dd2cc0c R14: ffff88809dd2cbd0 R15: 0000000000000000
[   34.926517] FS:  0000000000f03880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
[   34.934764] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.940972] CR2: 0000000000000000 CR3: 000000008d0ca000 CR4: 00000000001406f0
[   34.948225] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.955486] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.962735] Call Trace:
[   34.965316]  checksum_tg+0x52/0x65
[   34.968835]  ipt_do_table+0xaaf/0x16d0
[   34.972703]  ? get_info+0x530/0x530
[   34.976318]  ? ___pskb_trim+0x6c8/0xf20
[   34.980356]  ? save_trace+0x220/0x290
[   34.984149]  iptable_mangle_hook+0x9c/0x560
[   34.988464]  nf_hook_slow+0xa5/0x1a0
[   34.992170]  ip_rcv+0xb9e/0xfec
[   34.995428]  ? ip_local_deliver+0x450/0x450
[   34.999724]  ? ip_local_deliver_finish+0xaa0/0xaa0
[   35.004629]  ? ip_local_deliver+0x450/0x450
[   35.008929]  __netif_receive_skb_core+0x1e50/0x2c00
[   35.013975]  ? trace_hardirqs_on+0x10/0x10
[   35.018202]  ? enqueue_to_backlog+0xd20/0xd20
[   35.022690]  ? finish_task_switch+0x178/0x620
[   35.027169]  ? lock_acquire+0x170/0x3f0
[   35.031127]  ? __netif_receive_skb+0x27/0x1a0
[   35.035651]  __netif_receive_skb+0x27/0x1a0
[   35.039955]  netif_receive_skb_internal+0xd7/0x580
[   35.044865]  ? dev_cpu_dead+0x8c0/0x8c0
[   35.048818]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   35.054259]  ? rcu_read_lock_sched_held+0x10a/0x130
[   35.059253]  ? netif_receive_skb+0x47/0x2a0
[   35.063553]  tun_rx_batched.isra.0+0x46c/0x7a0
[   35.068112]  ? tun_sock_write_space+0x190/0x190
[   35.072771]  ? ___preempt_schedule_notrace+0x16/0x27
[   35.077867]  ? preempt_schedule_notrace+0x99/0x120
[   35.082777]  ? ___preempt_schedule_notrace+0x16/0x27
[   35.087871]  tun_get_user+0xcde/0x3880
[   35.091753]  ? tun_net_xmit+0xf10/0xf10
[   35.095711]  ? find_held_lock+0x2d/0x110
[   35.099762]  ? __tun_get+0x11c/0x220
[   35.103460]  ? lock_downgrade+0x6e0/0x6e0
[   35.107592]  tun_chr_write_iter+0xcf/0x179
[   35.112596]  __vfs_write+0x44e/0x630
[   35.116354]  ? kernel_read+0x110/0x110
[   35.120281]  ? avc_policy_seqno+0x5/0x10
[   35.124326]  ? selinux_file_permission+0x7a/0x440
[   35.129595]  ? rw_verify_area+0xe1/0x2a0
[   35.134217]  vfs_write+0x192/0x4e0
[   35.137740]  SyS_write+0xf2/0x210
[   35.141177]  ? SyS_read+0x210/0x210
[   35.144940]  ? do_syscall_64+0x4c/0x640
[   35.148939]  ? SyS_read+0x210/0x210
[   35.152549]  do_syscall_64+0x1d5/0x640
[   35.156417]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   35.161586] RIP: 0033:0x441729
[   35.164755] RSP: 002b:00007fffbaae6ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   35.172450] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441729
[   35.179737] RDX: 000000000000fdef RSI: 00000000200000c0 RDI: 0000000000000003
[   35.187044] RBP: 656c6c616b7a7973 R08: 0000000000001c00 R09: 0000000000402fb0
[   35.194299] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402fb0
[   35.201603] R13: 0000000000403040 R14: 0000000000000000 R15: 0000000000000000
[   35.208857] Code: 8b 7c 24 28 e8 75 e0 85 fc e9 0d fe ff ff e8 4b 8e 5c fc 48 89 ef 41 bc ea ff ff ff e8 9d b3 ff ff e9 94 fe ff ff e8 33 8e 5c fc <0f> 0b e8 2c 8e 5c fc 0f 0b e8 25 8e 5c fc 48 8b 54 24 28 48 b8 
[   35.227931] RIP: skb_checksum_help+0x5fd/0x830 RSP: ffff888097cdf468
[   35.234469] ---[ end trace dd20dd799c821843 ]---
[   35.239239] Kernel panic - not syncing: Fatal exception in interrupt
[   35.246850] Kernel Offset: disabled
[   35.250471] Rebooting in 86400 seconds..