Backtrace

WARNING: CPU: 1 PID: 0 at kernel/workqueue.c:1474 __queue_work+0x33f/0x3e0
Modules linked in: cdc_acm 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 ccm nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter sunrpc intel_rapl_msr intel_rapl_common uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc x86_pkg_temp_thermal ath9k ath9k_common ath9k_hw intel_powerclamp snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio mac80211 snd_hda_intel coretemp mei_hdcp at24 snd_intel_dspcfg snd_hda_codec ath snd_hda_core cfg80211 snd_hwdep kvm_intel snd_seq iTCO_wdt snd_seq_device kvm intel_pmc_bxt acer_wmi libarc4 joydev
 sparse_keymap iTCO_vendor_support snd_pcm rfkill snd_timer wmi_bmof irqbypass snd i2c_i801 lpc_ich soundcore mei_me mei i2c_smbus pcspkr rapl intel_cstate intel_uncore ip_tables i915 i2c_algo_bit drm_kms_helper cec drm crct10dif_pclmul crc32_pclmul crc32c_intel sdhci_pci ghash_clmulni_intel cqhci sdhci mmc_core serio_raw tg3 wmi video fuse
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.18-100.fc31.x86_64 #1
Hardware name: Acer Aspire E1-571/EA50_HC_CR, BIOS V2.13 01/17/2013
RIP: 0010:__queue_work+0x33f/0x3e0
Code: e2 f1 78 a9 00 01 ff 00 75 0f 65 48 8b 3c 25 c0 7b 01 00 f6 47 24 20 75 25 0f 0b 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b e9 fe fd ff ff 41 83 cd 02 48 8d 53 60 e9 e3 fd ff ff e8 a8
RSP: 0018:ffffbb87c0100e90 EFLAGS: 00010093
RAX: ffff9c9ac0357798 RBX: ffff9c9acb46f700 RCX: 0000000000000000
RDX: ffff9c9ac0357790 RSI: 0000000000000002 RDI: ffff9c9acb469c40
RBP: ffff9c9ac0357790 R08: ffff9c9acb469c40 R09: ffff9c9aca4036c0
R10: ffff9c9aca4036f8 R11: 0000000000000000 R12: 000000000000002a
R13: 0000000000000001 R14: 0000000000002000 R15: ffff9c9aca818e00
FS:  0000000000000000(0000) GS:ffff9c9acb440000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558095499008 CR3: 0000000137a0a002 CR4: 00000000001606e0
Call Trace:
 <IRQ>
 queue_work_on+0x36/0x40
 __usb_hcd_giveback_urb+0x6f/0x120
 usb_giveback_urb_bh+0xa0/0xf0
 tasklet_action_common.isra.0+0x5b/0x100
 __do_softirq+0xee/0x2ff
 ? x2apic_cluster_probe.cold+0x11/0x11
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 do_softirq_own_stack+0x37/0x40
 irq_exit_rcu+0xd8/0xe0
 common_interrupt+0x75/0x150
 asm_common_interrupt+0x1e/0x40
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:ffffbb87c009be78 EFLAGS: 00000246
RAX: ffff9c9acb46a2c0 RBX: ffff9c9acb475000 RCX: 000000000000001f
RDX: 0000000000000000 RSI: 000000003157b787 RDI: 0000000000000000
RBP: ffffffff88b6f540 R08: 00000ad4c6a071a9 R09: 0000000000000105
R10: 0000000000000031 R11: ffff9c9acb4690e4 R12: 00000ad4c6a071a9
R13: 0000000000000005 R14: 0000000000000005 R15: ffff9c9acaac8000
 ? 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