Backtrace

BUG: unable to handle page fault for address: ffffb0f5b0000003
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 100000067 P4D 100000067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP NOPTI
CPU: 4 PID: 4363 Comm: langdon_demo Tainted: G           OE      6.5.6-300.fc39.x86_64 #1
Hardware name: LENOVO 30E0008QUS/1046, BIOS S07KT47A 05/06/2022
RIP: 0010:iowrite32+0xd/0x60
Code: ff 0f 0b e9 85 b0 7c 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 81 fe ff ff 03 00 76 07 <89> 3e e9 5c b0 7c 00 48 81 fe 00 00 01 00 76 0a 89 f8 89 f2 ef e9
RSP: 0018:ffffb0f4a20d7e30 EFLAGS: 00010292
RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffb0f4b0000000 RSI: ffffb0f5b0000003 RDI: 0000000000000000
RBP: ffff8f5206917200 R08: 0000000000000000 R09: ffffb0f4a20d7ce0
R10: 0000000000000003 R11: ffff8f58ed0fffe8 R12: 0000000080084608
R13: 00007ffcb6c7e3ac R14: ffff8f5309148000 R15: 0000000000000000
FS:  00007f0567118480(0000) GS:ffff8f58ed300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffb0f5b0000003 CR3: 00000001ee5d8000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 ? __die+0x23/0x70
 ? page_fault_oops+0x171/0x4e0
 ? srso_return_thunk+0x5/0x10
 ? exc_page_fault+0x175/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? iowrite32+0xd/0x60
 langdon_dma_ioctl+0x498/0x580 [langdon_driver]
 proc_reg_unlocked_ioctl+0x5b/0xa0
 ? srso_return_thunk+0x5/0x10
 __x64_sys_ioctl+0x97/0xd0
 do_syscall_64+0x60/0x90
 ? srso_return_thunk+0x5/0x10
 ? syscall_exit_to_user_mode+0x2b/0x40
 ? srso_return_thunk+0x5/0x10
 ? do_syscall_64+0x6c/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f056722a17d
Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
RSP: 002b:00007ffcb6c7e320 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f056722a17d
RDX: 00007ffcb6c7e3ac RSI: 0000000080084608 RDI: 0000000000000004
RBP: 00007ffcb6c7e370 R08: 0000000000000000 R09: 00007ffcb6c7da10
R10: 00007f0567124b38 R11: 0000000000000246 R12: 0000000000000009
R13: 0000000000000000 R14: 00007f056769d000 R15: 000000000042bc78
 </TASK>
Modules linked in: langdon_driver(OE) tls 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 rfkill ip_set nf_tables nfnetlink qrtr sunrpc binfmt_misc intel_rapl_msr intel_rapl_common amd64_edac edac_mce_amd kvm_amd vfat fat snd_hda_codec_hdmi ucsi_ccg kvm typec_ucsi typec irqbypass snd_hda_intel snd_usb_audio snd_intel_dspcfg snd_intel_sdw_acpi think_lmi rapl firmware_attributes_class wmi_bmof snd_hda_codec snd_usbmidi_lib pcspkr acpi_cpufreq snd_ump snd_rawmidi snd_hda_core mc snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd i2c_nvidia_gpu soundcore i2c_piix4 k10temp joydev loop zram nouveau drm_ttm_helper ttm crct10dif_pclmul crc32_pclmul video crc32c_intel polyval_clmulni i2c_algo_bit polyval_generic ghash_clmulni_intel sha512_ssse3 mxm_wmi nvme drm_display_helper uas atlantic nvme_core ccp cec
 usb_storage nvme_common sp5100_tco macsec wmi ip6_tables ip_tables fuse
CR2: ffffb0f5b0000003