[ 4298.531408] BUG: unable to handle kernel NULL pointer dereference at 0000000000000114 [ 4298.534882] IP: [] strlen+0x0/0x20 [ 4298.534882] PGD 0 [ 4298.534882] Oops: 0000 [#1] SMP [ 4298.534882] Modules linked in: xt_conntrack xt_tcpudp xt_CT nf_log_ipv6 nf_log_ipv4 nf_log_common xt_LOG xt_comment xt_limit xt_set ip_set_hash_netnet ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_net ip_set nfnetlink ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip6table_raw iptable_raw ip6table_filter ip6_tables iptable_filter ip_tables x_tables snd_hda_codec_generic kvm_amd snd_hda_intel kvm snd_hda_codec irqbypass snd_hda_core input_leds snd_hwdep joydev snd_pcm serio_raw snd_timer snd i2c_piix4 soundcore 8250_fintek mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic virtio_gpu ttm drm_kms_helper syscopyarea psmouse usbhid sysfillrect hid sysimgblt fb_sys_fops drm pata_acpi floppy [ 4298.534882] CPU: 0 PID: 8645 Comm: ipset Not tainted 4.4.0-134-generic #160-Ubuntu [ 4298.534882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 4298.534882] task: ffff880017826600 ti: ffff88001b100000 task.ti: ffff88001b100000 [ 4298.534882] RIP: 0010:[] [] strlen+0x0/0x20 [ 4298.534882] RSP: 0018:ffff88001b103aa8 EFLAGS: 00000202 [ 4298.534882] RAX: 0000000000000086 RBX: ffff880017651a80 RCX: 0000000000000104 [ 4298.534882] RDX: ffff88001914fe58 RSI: ffff88001b103ab0 RDI: 0000000000000114 [ 4298.534882] RBP: ffff88001b103ae8 R08: 0100000000000000 R09: 0100000000000000 [ 4298.534882] R10: ffff880017a97078 R11: 00347670692d6c61 R12: ffff88001914fe40 [ 4298.534882] R13: ffff88001699c500 R14: 0000000000000114 R15: ffff88001914fe48 [ 4298.534882] FS: 00007f4231863700(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000 [ 4298.534882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4298.534882] CR2: 0000000000000114 CR3: 0000000015e6b000 CR4: 00000000000006f0 [ 4298.534882] Stack: [ 4298.534882] ffffffffc055c779 0100000000000000 b6eea494b627f0fe ffff88001914fe40 [ 4298.534882] 000000000000000b 0000000000000000 ffff88001699c500 ffff880017651a80 [ 4298.534882] ffff88001b103b90 ffffffffc0576ede ffff880017a96ef4 ffff88001ad40000 [ 4298.534882] Call Trace: [ 4298.534882] [] ? ip_set_put_extensions+0x99/0x260 [ip_set] [ 4298.534882] [] hash_netport4_list+0x35e/0x530 [ip_set_hash_netport] [ 4298.534882] [] ip_set_dump_start+0x4c5/0x7b0 [ip_set] [ 4298.534882] [] ? __kmalloc_reserve.isra.34+0x31/0x90 [ 4298.534882] [] ? __alloc_skb+0x5b/0x1f0 [ 4298.534882] [] ? __alloc_skb+0x9b/0x1f0 [ 4298.534882] [] netlink_dump+0x23a/0x2d0 [ 4298.534882] [] netlink_recvmsg+0x278/0x420 [ 4298.534882] [] sock_recvmsg+0x43/0x50 [ 4298.534882] [] ___sys_recvmsg+0xda/0x1f0 [ 4298.534882] [] ? dput+0x34/0x230 [ 4298.534882] [] ? common_file_perm+0x6e/0x1a0 [ 4298.534882] [] __sys_recvmsg+0x51/0x90 [ 4298.534882] [] SyS_recvmsg+0x12/0x20 [ 4298.534882] [] entry_SYSCALL_64_fastpath+0x22/0xc1 [ 4298.534882] Code: 89 f8 48 89 e5 f6 82 00 22 a5 81 20 74 10 48 83 c0 01 0f b6 10 f6 82 00 22 a5 81 20 75 f0 5d c3 90 66 2e 0f 1f 84 00 00 00 00 00 <80> 3f 00 55 48 89 e5 74 11 48 89 f8 48 83 c0 01 80 38 00 75 f7 [ 4298.534882] RIP [] strlen+0x0/0x20 [ 4298.534882] RSP [ 4298.534882] CR2: 0000000000000114 [ 4298.534882] ---[ end trace 1b64c51e89b1e9e3 ]--- [ 4298.534882] Kernel panic - not syncing: Fatal exception in interrupt [ 4298.534882] Kernel Offset: disabled [ 4298.534882] ---[ end Kernel panic - not syncing: Fatal exception in interrupt