Hi, I'm trying to make WG work on Ubuntu 14.04.5, but got a driver bug apparently. WG was installed this way: sudo add-apt-repository ppa:wireguard/wireguard && sudo apt update && sudo apt install wireguard Then, the following commands were executed (mixed with syslog output): $ lsb_release -a Distributor ID:    Ubuntu Description:    Ubuntu 14.04.5 LTS Release:    14.04 Codename:    trusty $ uname -a Linux l 3.13.0-165-generic #215-Ubuntu SMP Wed Jan 16 11:46:47 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux $ apt search wireguard wireguard/trusty,now 0.0.20190123-wg1~trusty all [installed] wireguard-dkms/trusty,now 0.0.20190123-wg1~trusty all [installed,automatic] wireguard-tools/trusty,now 0.0.20190123-wg1~trusty amd64 [installed,automatic] $ wg genkey | tee privatekey | wg pubkey > publickey $ sudo ip link add dev wg0 type wireguard Feb  4 13:20:37 l kernel: [  248.082139] wireguard: module verification failed: signature and/or  required key missing - tainting kernel Feb  4 13:20:37 l kernel: [  248.082815] wireguard: WireGuard 0.0.20190123 loaded. See www.wireguard.com for information. Feb  4 13:20:37 l kernel: [  248.082816] wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld . All Rights Reserved. $ sudo ip addr add 10.0.0.1/24 dev wg0 $ sudo wg set wg0 listen-port 500 private-key ./privatekey $ sudo ip link set wg0 up Feb  4 13:22:12 l kernel: [  342.791370] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 Feb  4 13:22:12 l kernel: [  342.791635] IP: [] wg_socket_init+0x13c/0x3f0 [wireguard] Feb  4 13:22:12 l kernel: [  342.791861] PGD 80000000b2899067 PUD b2a0d067 PMD 0 Feb  4 13:22:12 l kernel: [  342.792043] Oops: 0000 [#1] SMP Feb  4 13:22:12 l kernel: [  342.792162] Modules linked in: wireguard(OX) ip_tunnel iptable_mangle xt_nat iptable_nat nf_nat_ipv4 ipt_REJECT xt_tcpmss xt_tcpudp xt_LOG xt_limit nf_conntrack_ipv4 nf_defrag_ipv4 xt_owner xt_recent xt_set xt_conntrack iptable_filter ip_tables ip_set_hash_ip ip_set nfnetlink bridge stp llc intel_rapl e1000e x86_pkg_temp_thermal intel_powerclamp r8169 mii kvm_intel ptp gpio_ich ipmi_devintf lpc_ich pps_core joydev shpchp kvm crct10dif_pclmul ipmi_si crc32_pclmul ghash_clmulni_intel nf_conntrack_sip nf_conntrack_tftp xt_multiport x_tables nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack coretemp lp nls_iso8859_1 parport dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid0 multipath linear raid1 hid_generic aesni_intel snd_pcsp aes_x86_64 glue_helper snd_pcm lrw snd_page_alloc gf128mul snd_timer ablk_helper usbhid ahci snd cryptd soundcore libahci hid wmi mac_hid Feb  4 13:22:12 l kernel: [  342.795383] CPU: 6 PID: 3154 Comm: ip Tainted: G           OX 3.13.0-165-generic #215-Ubuntu Feb  4 13:22:12 l kernel: [  342.795650] Hardware name: IBM IBM System x3100 M4 Feb  4 13:22:12 l kernel: [  342.795957] task: ffff88021cb0b000 ti: ffff8800af964000 task.ti: ffff8800af964000 Feb  4 13:22:12 l kernel: [  342.796192] RIP: 0010:[]  [] wg_socket_init+0x13c/0x3f0 [wireguard] Feb  4 13:22:12 l kernel: [  342.796497] RSP: 0018:ffff8800af9656e0  EFLAGS: 00010202 Feb  4 13:22:12 l kernel: [  342.796665] RAX: 0000000000000000 RBX: ffff88021b300880 RCX: 000000007fbae3ff Feb  4 13:22:12 l kernel: [  342.796894] RDX: ffff88021b300880 RSI: ffff880221d7f980 RDI: ffffffff81cded00 Feb  4 13:22:12 l kernel: [  342.797120] RBP: ffff8800af965798 R08: ffff88023fd94690 R09: 0000000000000004 Feb  4 13:22:12 l kernel: [  342.797344] R10: ffff88023fd94688 R11: ffffc90004e0ca8c R12: 0000000000000065 Feb  4 13:22:12 l kernel: [  342.797568] R13: 0000000000000000 R14: ffff8800af96573c R15: 00000000000001f4 Feb  4 13:22:12 l kernel: [  342.797794] FS: 00007f34c4d92740(0000) GS:ffff88023fd80000(0000) knlGS:0000000000000000 Feb  4 13:22:12 l kernel: [  342.798050] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Feb  4 13:22:12 l kernel: [  342.798230] CR2: 0000000000000018 CR3: 00000000af87a000 CR4: 0000000000160770 Feb  4 13:22:12 l kernel: [  342.798455] Stack: Feb  4 13:22:12 l kernel: [  342.798520]  ffff8800af965750 ffff880221d7f980 0000000000000000 ffff88021b300880 Feb  4 13:22:12 l kernel: [  342.798784]  ffffffff8162bd01 ffffffffa036c340 0000000000000002 0000000000000000 Feb  4 13:22:12 l kernel: [  342.799046]  0000000000000000 0000000000000000 0000f40100000000 0000000a00000001 Feb  4 13:22:12 l kernel: [  342.799309] Call Trace: Feb  4 13:22:12 l kernel: [  342.806648] [] ? skb_copy_and_csum_dev+0xb1/0xc0 Feb  4 13:22:12 l kernel: [  342.814226] [] ? send6+0x340/0x340 [wireguard] Feb  4 13:22:12 l kernel: [  342.821781] [] wg_open+0x5a/0xe0 [wireguard] Feb  4 13:22:12 l kernel: [  342.829201] [] __dev_open+0xc2/0x140 Feb  4 13:22:12 l kernel: [  342.836477] [] __dev_change_flags+0xa3/0x180 Feb  4 13:22:12 l kernel: [  342.843676] [] dev_change_flags+0x29/0x60 Feb  4 13:22:12 l kernel: [  342.850884] [] do_setlink+0x2f6/0x9a0 Feb  4 13:22:12 l kernel: [  342.857911] [] ? nla_parse+0x32/0x120 Feb  4 13:22:12 l kernel: [  342.864767] [] rtnl_newlink+0x3ba/0x620 Feb  4 13:22:12 l kernel: [  342.871445] [] ? __alloc_pages_nodemask+0x1a3/0xb90 Feb  4 13:22:12 l kernel: [  342.878020] [] ? security_capable+0x1e/0x20 Feb  4 13:22:12 l kernel: [  342.884415] [] ? ns_capable+0x29/0x50 Feb  4 13:22:12 l kernel: [  342.890633] [] rtnetlink_rcv_msg+0x98/0x250 Feb  4 13:22:12 l kernel: [  342.896710] [] ? __kmalloc_node_track_caller+0x58/0x2b0 Feb  4 13:22:12 l kernel: [  342.902695] [] ? __alloc_skb+0x7e/0x2b0 Feb  4 13:22:12 l kernel: [  342.908496] [] ? rtnetlink_rcv+0x30/0x30 Feb  4 13:22:12 l kernel: [  342.914122] [] netlink_rcv_skb+0xab/0xc0 Feb  4 13:22:12 l kernel: [  342.919616] [] rtnetlink_rcv+0x28/0x30 Feb  4 13:22:12 l kernel: [  342.924963] [] netlink_unicast+0xe0/0x1b0 Feb  4 13:22:12 l kernel: [  342.930172] [] netlink_sendmsg+0x30e/0x680 Feb  4 13:22:12 l kernel: [  342.935225] [] sock_sendmsg+0x91/0xc0 Feb  4 13:22:12 l kernel: [  342.940134] [] ? __mem_cgroup_commit_charge+0x156/0x3d0 Feb  4 13:22:12 l kernel: [  342.944970] [] ? move_addr_to_kernel.part.14+0x1e/0x60 Feb  4 13:22:12 l kernel: [  342.949771] [] ? move_addr_to_kernel+0x21/0x30 Feb  4 13:22:12 l kernel: [  342.954457] [] ___sys_sendmsg+0x389/0x3a0 Feb  4 13:22:12 l kernel: [  342.959123] [] ? sock_destroy_inode+0x2f/0x40 Feb  4 13:22:12 l kernel: [  342.963784] [] ? __do_page_fault+0x214/0x570 Feb  4 13:22:12 l kernel: [  342.968464] [] ? dput+0xad/0x190 Feb  4 13:22:12 l kernel: [  342.973110] [] ? mntput+0x24/0x40 Feb  4 13:22:12 l kernel: [  342.977642] [] ? __fput+0x181/0x260 Feb  4 13:22:12 l kernel: [  342.982066] [] __sys_sendmsg+0x42/0x80 Feb  4 13:22:12 l kernel: [  342.986430] [] SyS_sendmsg+0x12/0x20 Feb  4 13:22:12 l kernel: [  342.990694] [] system_call_fastpath+0x26/0x2b Feb  4 13:22:12 l kernel: [  342.994897] Code: 7f 48 8b 78 20 e8 65 7e 2b e1 48 8b bb 50 02 00 00 48 8b b5 50 ff ff ff 48 8d 95 60 ff ff ff e8 8b dd 01 00 48 8b 05 9c 44 9b e1 <48> 83 78 18 00 0f 84 87 01 00 00 48 8b 95 50 ff ff ff 48 8b bb Feb  4 13:22:12 l kernel: [  343.008678] RIP [] wg_socket_init+0x13c/0x3f0 [wireguard] Feb  4 13:22:12 l kernel: [  343.013245]  RSP Feb  4 13:22:12 l kernel: [  343.017746] CR2: 0000000000000018 Feb  4 13:22:12 l kernel: [  343.022234] ---[ end trace 7a6ac50ecd32399e ]--- Any idea what could be the problem? Regards, Anatoli