Backtrace

NETDEV WATCHDOG: enp0s20u6u1u1 (cdc_ether): transmit queue 0 timed out
WARNING: CPU: 5 PID: 0 at net/sched/sch_generic.c:442 dev_watchdog+0x24e/0x260
Modules linked in: tap cdc_ether usbnet mii rfcomm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp 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 bridge stp llc ip_set nfnetlink ebtable_filter ebtables cmac bnep ip6table_filter ip6_tables iptable_filter tun sunrpc vfat fat snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic ledtrig_audio iwlmvm snd_hda_intel btusb mac80211 snd_intel_dspcfg intel_rapl_msr intel_rapl_common snd_hda_codec libarc4 snd_hda_core snd_hwdep x86_pkg_temp_thermal snd_seq intel_powerclamp btrtl btbcm iwlwifi btintel bluetooth snd_seq_device coretemp snd_pcm kvm_intel ecdh_generic snd_timer cfg80211 snd ecc kvm iTCO_wdt intel_pmc_bxt irqbypass iTCO_vendor_support
 soundcore pcspkr rfkill lpc_ich rapl intel_cstate intel_uncore mei_me i2c_i801 mei mxm_wmi i2c_smbus binfmt_misc ip_tables hid_logitech_hidpp hid_logitech_dj amdgpu iommu_v2 gpu_sched raid1 radeon drm_kms_helper cec ttm crct10dif_pclmul crc32_pclmul crc32c_intel drm igb e1000e ghash_clmulni_intel dca i2c_algo_bit wmi fuse i2c_dev
CPU: 5 PID: 0 Comm: swapper/5 Tainted: G        W         5.8.18-100.fc31.x86_64 #1
Hardware name: MSI MS-7881/X99A XPOWER AC (MS-7881), BIOS A.70 06/20/2018
RIP: 0010:dev_watchdog+0x24e/0x260
Code: 85 c0 75 e5 eb 9c 4c 89 ef c6 05 c0 68 23 01 01 e8 e7 05 fb ff 44 89 e1 4c 89 ee 48 c7 c7 28 fb 49 95 48 89 c2 e8 64 e8 6e ff <0f> 0b e9 7a ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
RSP: 0018:ffffbacc00224e98 EFLAGS: 00010292
RAX: 0000000000000046 RBX: ffff9abc0a862600 RCX: 0000000000000027
RDX: 0000000000000027 RSI: 0000000000000096 RDI: ffff9abc3fb58d08
RBP: ffff9ab883be83dc R08: ffff9abc3fb58d00 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff9ab883be8000 R14: ffff9ab883be8480 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff9abc3fb40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000035c709ba8000 CR3: 0000001410a0a004 CR4: 00000000001606e0
Call Trace:
 <IRQ>
 ? pfifo_fast_enqueue+0x150/0x150
 call_timer_fn+0x2d/0x130
 run_timer_softirq+0x183/0x490
 ? __hrtimer_run_queues+0x115/0x240
 ? recalibrate_cpu_khz+0x10/0x10
 ? ktime_get+0x38/0x90
 ? sched_clock+0x5/0x10
 __do_softirq+0xee/0x2ff
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 do_softirq_own_stack+0x37/0x40
 irq_exit_rcu+0xd8/0xe0
 sysvec_apic_timer_interrupt+0x34/0x80
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:cpuidle_enter_state+0xc9/0x3e0
Code: e8 0c f5 7d ff 80 7c 24 0f 00 74 17 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 e5 02 00 00 31 ff e8 4e 4b 84 ff fb 66 0f 1f 44 00 00 <45> 85 ed 0f 88 3b 02 00 00 49 63 d5 4c 2b 64 24 10 48 8d 04 52 48
RSP: 0018:ffffbacc000f3e78 EFLAGS: 00000246
RAX: ffff9abc3fb6a2c0 RBX: ffff9abc3fb75200 RCX: 000000000000001f
RDX: 0000000000000000 RSI: 000000002aaaaaaa RDI: 0000000000000000
RBP: ffffffff95b6f540 R08: 000010785a76e3a6 R09: 0000000000000cd2
R10: 0000000000000242 R11: ffff9abc3fb690e4 R12: 000010785a76e3a6
R13: 0000000000000003 R14: 0000000000000003 R15: ffff9abc389626c0
 ? cpuidle_enter_state+0xa4/0x3e0
 cpuidle_enter+0x29/0x40
 do_idle+0x1c0/0x260
 cpu_startup_entry+0x19/0x20
 start_secondary+0x144/0x170
 secondary_startup_64+0xb6/0xc0