Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000049
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 3 PID: 27617 Comm: kworker/3:1 Tainted: G           OE      6.1.5-200.fc37.x86_64 #1
Hardware name: Intel(R) Client Systems NUC8i5BEK/NUC8BEB, BIOS BECFL357.86A.0041.2018.0719.1931 07/19/2018
Workqueue: events_long drm_dp_mst_up_req_work [drm_display_helper]
RIP: 0010:get_mst_branch_device_by_guid_helper+0xf/0x70 [drm_display_helper]
Code: 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1f 44 00 00 e9 26 89 3d f2 66 0f 1f 44 00 00 0f 1f 44 00 00 41 54 55 48 89 f5 53 48 8b 16 <48> 39 57 49 74 3f 48 8b 47 28 4c 8d 67 28 48 8d 58 e8 49 39 c4 74
RSP: 0018:ffffb7d82056fe10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9b45c1820ce8 RCX: ffff9b45c1820cd8
RDX: 0000000104b68ca6 RSI: ffff9b45c109e198 RDI: 0000000000000000
RBP: ffff9b45c109e198 R08: 0000000000000000 R09: 0000000080150014
R10: 0000000000000008 R11: 0000000000000000 R12: ffff9b45c109e180
R13: ffff9b45c1820cd8 R14: ffff9b45c109e198 R15: ffff9b45c109e208
FS:  0000000000000000(0000) GS:ffff9b492dcc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000049 CR3: 00000003cf010002 CR4: 00000000003706e0
Call Trace:
 <TASK>
 drm_dp_mst_up_req_work+0x12b/0x450 [drm_display_helper]
 process_one_work+0x1c4/0x380
 worker_thread+0x4d/0x380
 ? rescuer_thread+0x380/0x380
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: ppp_deflate bsd_comp ppp_async ppp_generic slhc cdc_ether usbnet tls rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs rc_hauppauge em28xx_rc si2157 lgdt3306a i2c_mux em28xx_dvb dvb_core nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter iptable_filter snd_hda_codec_hdmi qrtr snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci
 snd_sof_xtensa_dsp snd_sof snd_sof_utils soundwire_bus snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp bnep snd_soc_acpi_intel_match snd_soc_acpi snd_hda_codec_realtek snd_soc_core intel_rapl_msr intel_rapl_common snd_hda_codec_generic snd_compress ledtrig_audio ac97_bus snd_pcm_dmaengine iwlmvm snd_hda_intel intel_tcc_cooling sunrpc snd_intel_dspcfg x86_pkg_temp_thermal snd_intel_sdw_acpi intel_powerclamp coretemp mac80211 snd_hda_codec snd_hda_core kvm_intel snd_hwdep iTCO_wdt libarc4 mei_pxp mei_hdcp ee1004 intel_pmc_bxt btusb snd_seq iTCO_vendor_support snd_seq_device btrtl kvm btbcm iwlwifi snd_pcm em28xx btintel irqbypass rapl tveeprom btmtk vfat intel_cstate snd_timer fat intel_uncore pcspkr bluetooth wmi_bmof snd intel_wmi_thunderbolt cfg80211 videodev joydev mei_me i2c_i801 soundcore i2c_smbus mc mei rfkill intel_pch_thermal ir_rc6_decoder rc_rc6_mce ite_cir acpi_pad zram hid_logitech_hidpp crct10dif_pclmul rtsx_pci_sdmmc i915
 crc32_pclmul mmc_core crc32c_intel polyval_clmulni polyval_generic nvme ghash_clmulni_intel e1000e nvme_core drm_buddy drm_display_helper sha512_ssse3 rtsx_pci cec nvme_common hid_logitech_dj ttm video wmi pinctrl_cannonlake r8152 mii scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip6_tables ip_tables dm_multipath fuse
CR2: 0000000000000049