Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000020
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] SMP PTI
CPU: 1 PID: 848 Comm: pool-NetworkMan Not tainted 5.8.18-100.fc31.x86_64 #1
Hardware name: Hewlett-Packard HPE-442f/2A9C, BIOS 6.12 07/12/2010
RIP: 0010:ip_output+0x9d/0xd0
Code: 00 00 eb e1 4c 8b 87 f8 0a 00 00 4d 85 c0 74 48 48 89 74 24 08 31 c9 48 89 e6 48 89 54 24 10 4c 89 c2 48 89 7c 24 20 4c 89 e7 <4c> 89 6c 20 18 c7 04 24 04 00 00 00 c6 44 24 04 02 48 c7 44 24 28
RSP: 0018:ffffa11f80d63bb8 EFLAGS: 00010246
RAX: 0000000000000008 RBX: ffffffffbbbf2e40 RCX: 0000000000000000
RDX: ffff92f8894e0280 RSI: ffffa11f80d63bb8 RDI: ffff92f89ea78700
RBP: ffffffffbbbf2e40 R08: ffff92f8894e0280 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000002c R12: ffff92f89ea78700
R13: ffff92f883eaf080 R14: ffff92f883eaf3f0 R15: 0000000000000033
FS:  00007f25ad756700(0000) GS:ffff92f8a7c40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 000000020d116000 CR4: 00000000000006e0
Call Trace:
 ? ip_local_out+0x18/0x50
 ip_send_skb+0x15/0x40
 udp_send_skb.isra.0+0x150/0x350
 udp_sendmsg+0xb0e/0xd50
 ? ip_reply_glue_bits+0x40/0x40
 ? sock_has_perm+0x84/0xa0
 ? ip_route_output_key_hash_rcu+0x4d2/0x870
 ? sock_sendmsg+0x57/0x60
 sock_sendmsg+0x57/0x60
 __sys_sendto+0xee/0x160
 ? ip_setsockopt+0x29/0x80
 __x64_sys_sendto+0x25/0x30
 do_syscall_64+0x4d/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f25bcfe5c8c
Code: 89 4c 24 1c e8 75 f8 ff ff 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 30 89 ef 48 89 04 24 e8 a1 f8 ff ff 48 8b 04
RSP: 002b:00007f25ad754090 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000002309e8e0 RCX: 00007f25bcfe5c8c
RDX: 000000000000002b RSI: 00007f25ad754320 RDI: 000000000000001c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 00007f25ad7541f8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in: uinput xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp tun bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter sunrpc rt2800pci rt2800mmio rt2800lib rt2x00pci rt2x00mmio rt2x00lib mac80211 cfg80211 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep intel_powerclamp gpio_ich coretemp snd_seq snd_seq_device snd_pcm joydev eeprom_93cx6 rfkill libarc4 mei_wdt iTCO_wdt intel_pmc_bxt iTCO_vendor_support at24 snd_timer snd soundcore wmi_bmof intel_cstate intel_uncore pcspkr mei_me mei i2c_i801 lpc_ich
 i2c_smbus i7core_edac acpi_cpufreq ip_tables radeon i2c_algo_bit drm_kms_helper cec crc32c_intel ttm uas drm firewire_ohci usb_storage firewire_core hid_roccat_savu r8169 crc_itu_t hid_roccat hid_roccat_common wmi fuse
CR2: 0000000000000020