Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000005
#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: 0 PID: 651 Comm: kworker/0:3 Not tainted 6.8.5-301.fc40.x86_64 #1
Hardware name: Xplore Tech iX104C5/iX104C5, BIOS V1.03           11/17/2011
Workqueue: pm pm_runtime_work
RIP: 0010:serial8250_tx_chars+0xd2/0x280
Code: 5e 00 a8 20 0f 84 a1 01 00 00 41 83 ec 01 48 63 85 8c 01 00 00 45 85 e4 0f 8e ab 01 00 00 48 8b 95 80 01 00 00 31 f6 48 89 df <0f> b6 14 02 48 8b 43 20 e8 a1 59 5e 00 f6 83 4c 02 00 00 20 74 11
RSP: 0018:ffffbbb100503d30 EFLAGS: 00010046
RAX: 0000000000000005 RBX: ffffffffab342b20 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffab342b20
RBP: ffff9307816646e0 R08: ffff93078491e280 R09: ffff93078491e2c0
R10: 0000000000000003 R11: 0000000000000003 R12: 0000000000000010
R13: ffff930781761ce4 R14: 0000000000000000 R15: ffff9307826c8000
FS:  0000000000000000(0000) GS:ffff930835e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000005 CR3: 000000018d422005 CR4: 00000000000206f0
Call Trace:
 <TASK>
 ? __die+0x23/0x70
 ? page_fault_oops+0x174/0x530
 ? exc_page_fault+0x7f/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? serial8250_tx_chars+0xd2/0x280
 serial8250_start_tx+0x1a8/0x1e0
 serial_port_runtime_suspend+0x83/0xc0
 ? __pfx_serial_port_runtime_suspend+0x10/0x10
 __rpm_callback+0x44/0x170
 ? __pfx_serial_port_runtime_suspend+0x10/0x10
 rpm_callback+0x5d/0x70
 ? __pfx_serial_port_runtime_suspend+0x10/0x10
 rpm_suspend+0x11e/0x6c0
 ? complete+0x1c/0x80
 pm_runtime_work+0x98/0xb0
 process_one_work+0x170/0x330
 worker_thread+0x273/0x3c0
 ? __pfx_worker_thread+0x10/0x10
 kthread+0xe8/0x120
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x34/0x50
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1b/0x30
 </TASK>
Modules linked in: rfcomm snd_seq_dummy snd_hrtimer 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 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables qrtr uhid bnep snd_hda_codec_realtek snd_hda_codec_generic intel_powerclamp snd_hda_intel coretemp kvm_intel snd_intel_dspcfg snd_intel_sdw_acpi iTCO_wdt mei_wdt snd_hda_codec mei_pxp uvcvideo intel_pmc_bxt at24 iwldvm iTCO_vendor_support kvm uvc snd_hda_core videobuf2_vmalloc mac80211 snd_hwdep videobuf2_memops videobuf2_v4l2 snd_seq videobuf2_common libarc4 irqbypass sparse_keymap btusb btrtl btintel intel_cstate btbcm videodev btmtk iwlwifi mei_me intel_uncore platform_profile i2c_i801 wmi_bmof bluetooth snd_seq_device pcspkr acpi_cpufreq cdc_acm snd_pcm mc i2c_smbus intel_ips mei cfg80211 lpc_ich snd_timer snd rfkill jmb38x_ms soundcore memstick binfmt_misc joydev loop nfnetlink zram i915 hid_logitech_hidpp
 crct10dif_pclmul crc32_pclmul crc32c_intel polyval_generic ghash_clmulni_intel sha512_ssse3 i2c_algo_bit sha256_ssse3 sha1_ssse3 drm_buddy ttm sdhci_pci broadcom bcm_phy_ptp cqhci drm_display_helper sdhci bcm_phy_lib firewire_ohci tg3 mmc_core cec firewire_core crc_itu_t video wmi wacom hid_logitech_dj serio_raw ip6_tables ip_tables fuse
CR2: 0000000000000005