Additional info:
reporter:       libreport-2.9.7
WARNING: CPU: 0 PID: 14081 at drivers/net/wireless/intel/iwlwifi/mvm/scan.c:1860 iwl_mvm_rx_umac_scan_complete_notif+0x1f3/0x200 [iwlmvm]
Modules linked in: ccm thunderbolt rfcomm fuse xt_CHECKSUM ipt_MASQUERADE tun bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast devlink xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ip6table_nat nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 cmac ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables bnep sunrpc vfat fat arc4 mei_wdt intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp iTCO_wdt iTCO_vendor_support kvm_intel crct10dif_pclmul crc32_pclmul snd_hda_codec_hdmi ghash_clmulni_intel intel_cstate intel_uncore iwlmvm uvcvideo dm_thin_pool intel_rapl_perf intel_wmi_thunderbolt dm_persistent_data dm_bio_prison libcrc32c mac80211 btusb snd_soc_skl wmi_bmof btrtl btbcm snd_soc_hdac_hda btintel videobuf2_vmalloc snd_hda_ext_core joydev snd_soc_skl_ipc snd_soc_sst_ipc videobuf2_memops iwlwifi
 snd_soc_sst_dsp bluetooth videobuf2_v4l2 snd_soc_acpi_intel_match videobuf2_common snd_soc_acpi snd_hda_codec_realtek snd_soc_core snd_hda_codec_generic snd_compress videodev ac97_bus snd_pcm_dmaengine snd_hda_intel snd_hda_codec cfg80211 media snd_hda_core ecdh_generic snd_hwdep snd_seq snd_seq_device snd_pcm ucsi_acpi typec_ucsi mei_me typec mei intel_pch_thermal snd_timer i2c_i801 thinkpad_acpi snd soundcore rfkill acpi_pad pcc_cpufreq i915 kvmgt mdev vfio kvm irqbypass i2c_algo_bit drm_kms_helper nvme e1000e crc32c_intel drm uas serio_raw nvme_core usb_storage hid_microsoft ff_memless wmi video
CPU: 0 PID: 14081 Comm: kworker/0:2 Not tainted 4.20.0-1.fc30.x86_64 #1
Hardware name: LENOVO 20HGS22D0W/20HGS22D0W, BIOS N1WET51W (1.30 ) 09/14/2018
Workqueue: events iwl_mvm_async_handlers_wk [iwlmvm]
RIP: 0010:iwl_mvm_rx_umac_scan_complete_notif+0x1f3/0x200 [iwlmvm]
Code: a7 fe ff ff 48 8b 7f 28 e8 7a 6d e9 ff 8b 8d 10 19 00 00 c7 85 30 19 00 00 00 00 00 00 41 8b 84 24 94 19 00 00 e9 81 fe ff ff <0f> 0b e9 33 ff ff ff e8 81 74 28 e7 90 0f 1f 44 00 00 53 48 8b 06
RSP: 0018:ffffbb4a8cfebe08 EFLAGS: 00010246
RAX: 0000000000000200 RBX: ffff985c542991c0 RCX: 0000000000000001
RDX: ffff985e086095c8 RSI: ffff985c7e42be90 RDI: ffff985e08609588
RBP: ffffbb4a8cfebe50 R08: ffff985e0e221928 R09: 0000000000000000
R10: 0000000000000000 R11: ffff985e0e21fd84 R12: ffff985e08609588
R13: 0000000000000000 R14: dead000000000100 R15: ffff985c7e42be80
FS:  0000000000000000(0000) GS:ffff985e0e200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2388c4d000 CR3: 00000002eb20a001 CR4: 00000000003606f0
Call Trace:
 iwl_mvm_async_handlers_wk+0xba/0x160 [iwlmvm]
 process_one_work+0x1a1/0x3a0
 worker_thread+0x30/0x380
 ? pwq_unbound_release_workfn+0xd0/0xd0
 kthread+0x112/0x130
 ? kthread_create_on_node+0x60/0x60
 ret_from_fork+0x35/0x40

Potential duplicate: bug 1564973