Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000020
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#2] SMP PTI
CPU: 14 PID: 681 Comm: systemd-udevd Tainted: G      D W I       5.11.12-300.fc34.x86_64 #1
Hardware name: System manufacturer System Product Name/PRIME X299-A, BIOS 1902 06/27/2019
RIP: 0010:klist_put+0x15/0x90
Code: 00 e9 28 ff ff ff 4c 89 f6 e8 57 cc 56 00 e9 73 ff ff ff 66 90 41 55 41 54 55 48 89 fd 53 4c 8b 27 89 f3 49 83 e4 fe 4c 89 e7 <4d> 8b 6c 24 20 e8 c1 ce 56 00 84 db 75 41 48 8d 7d 18 b8 ff ff ff
RSP: 0018:ffffa656811e7d58 EFLAGS: 00010246
RAX: ffff8a9d4b07a568 RBX: 0000000000000000 RCX: 0000000000000027
RDX: ffff8aa4c0198ac8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8a9d4b07a568 R08: ffff8a9d4b0cfca0 R09: ffffa656811e7b88
R10: ffffa656811e7b30 R11: ffffffff9ab1c450 R12: 0000000000000000
R13: ffffffffc042d000 R14: 00007f8b70c5432c R15: ffffa656811e7e88
FS:  00007f8b6fef3b40(0000) GS:ffff8aa4c0180000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 0000000105c02006 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ? device_driver_attach+0xb0/0xb0
 klist_iter_exit+0x14/0x20
 bus_for_each_dev+0x73/0x90
 bus_add_driver+0x12b/0x1e0
 driver_register+0x8f/0xe0
 ? 0xffffffffc0436000
 do_one_initcall+0x44/0x1d0
 ? do_init_module+0x23/0x270
 ? kmem_cache_alloc_trace+0xef/0x1e0
 do_init_module+0x5c/0x270
 __do_sys_init_module+0x11d/0x180
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f8b70b0144e
Code: 48 8b 0d 25 1a 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f2 19 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdafef54a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af
RAX: ffffffffffffffda RBX: 000055ccc261a980 RCX: 00007f8b70b0144e
RDX: 00007f8b70c5432c RSI: 00000000000028fe RDI: 000055ccc2706f10
RBP: 000055ccc2706f10 R08: 000055ccc24ae010 R09: 000055ccc2626a98
R10: 000000055ccc24ae R11: 0000000000000246 R12: 00007f8b70c5432c
R13: 000055ccc2619690 R14: 0000000000000007 R15: 000055ccc24ae290
Modules linked in: wmi_bmof(+) intel_wmi_thunderbolt(+) ioatdma dca zram ip_tables nouveau video i2c_algo_bit drm_ttm_helper ttm drm_kms_helper cec drm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel e1000e mxm_wmi wmi fuse
CR2: 0000000000000020