Comment 8 for bug 1956519

Kelsey, following the suggestion from bug 1956401, I've upgraded to 5.13.0-24-generic and it's exactly the same story as with 5.13.0-23:

    1.330735] BUG: kernel NULL pointer dereference, address: 000000000000000c
[ 1.330768] #PF: supervisor write access in kernel mode
[ 1.330788] #PF: error_code(0x0002) - not-present page
[ 1.330809] PGD 0 P4D 0
[ 1.330822] Oops: 0002 [#1] SMP NOPTI
[ 1.330838] CPU: 0 PID: 204 Comm: systemd-udevd Not tainted 5.13.0-24-generic #24-Ubuntu
[ 1.330870] Hardware name: ASUSTeK COMPUTER INC. MINIPC PN50/PN50, BIOS 0623 05/13/2021
[ 1.330900] RIP: 0010:amd_sfh_hid_client_init+0x47/0x350 [amd_sfh]
[ 1.330930] Code: 00 53 48 83 ec 20 48 8b 5f 08 48 8b 07 48 8d b3 22 01 00 00 4c 8d b0 c8 00 00 00 e8 23 07 00 00 45 31 c0 31 c9 ba 00 00 20 00 <89> 43 0c 48 8d 83 68 01 00 00 48 8d bb 80 01 00 00 48 c7 c6 f0 6d
[ 1.330997] RSP: 0018:ffffa523c0b939e0 EFLAGS: 00010246
[ 1.331018] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 1.331045] RDX: 0000000000200000 RSI: ffffffffc040c249 RDI: ffffffff9300004c
[ 1.331072] RBP: ffffa523c0b93a28 R08: 0000000000000000 R09: 0000000000000006
[ 1.331100] R10: ffffa523c0d00000 R11: 0000000000000007 R12: 0000000fffffffe0
[ 1.331127] R13: ffff8a4ac11c5cd8 R14: ffff8a4ac11570c8 R15: ffff8a4ac11c5cd8
[ 1.331154] FS: 00007feacb0ca8c0(0000) GS:ffff8a4dbf200000(0000) knlGS:0000000000000000
[ 1.331184] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.331206] CR2: 000000000000000c CR3: 0000000117148000 CR4: 0000000000350ef0
[ 1.331233] Call Trace:
[ 1.331245] <TASK>
[ 1.331255] ? __pci_set_master+0x5f/0xe0
[ 1.331276] amd_mp2_pci_probe+0xad/0x160 [amd_sfh]
[ 1.331298] local_pci_probe+0x48/0x80
[ 1.331315] pci_device_probe+0x105/0x1c0
[ 1.331333] really_probe+0x24b/0x4c0
[ 1.331351] driver_probe_device+0xf0/0x160
[ 1.331369] device_driver_attach+0xab/0xb0
[ 1.331388] __driver_attach+0xb2/0x140
[ 1.331405] ? device_driver_attach+0xb0/0xb0
[ 1.331423] bus_for_each_dev+0x7e/0xc0
[ 1.331440] driver_attach+0x1e/0x20
[ 1.331458] bus_add_driver+0x135/0x1f0
[ 1.331475] driver_register+0x95/0xf0
[ 1.331492] ? 0xffffffffc0411000
[ 1.331506] __pci_register_driver+0x57/0x60
[ 1.331524] amd_mp2_pci_driver_init+0x23/0x1000 [amd_sfh]
[ 1.331548] do_one_initcall+0x48/0x1d0
[ 1.331566] ? kmem_cache_alloc_trace+0xfb/0x240
[ 1.331587] do_init_module+0x62/0x290
[ 1.331605] load_module+0xa8f/0xb10
[ 1.331621] __do_sys_finit_module+0xc2/0x120
[ 1.331641] __x64_sys_finit_module+0x18/0x20
[ 1.332883] do_syscall_64+0x61/0xb0
[ 1.334112] ? fput+0x13/0x20
[ 1.335316] ? ksys_mmap_pgoff+0x135/0x260
[ 1.336514] ? exit_to_user_mode_prepare+0x37/0xb0
[ 1.337702] ? syscall_exit_to_user_mode+0x27/0x50
[ 1.338877] ? __x64_sys_mmap+0x33/0x40
[ 1.340036] ? do_syscall_64+0x6e/0xb0
[ 1.341180] ? do_syscall_64+0x6e/0xb0
[ 1.342303] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 1.343422] RIP: 0033:0x7feacb66094d
[ 1.344527] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b3 64 0f 00 f7 d8 64 89 01 48
[ 1.345707] RSP: 002b:00007ffc5c487aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1.346879] RAX: ffffffffffffffda RBX: 000055ce67fb06d0 RCX: 00007feacb66094d
[ 1.348048] RDX: 0000000000000000 RSI: 00007feacb7f03fe RDI: 0000000000000005
[ 1.349211] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000000
[ 1.349613] libphy: r8169: probed
[ 1.350355] R10: 0000000000000005 R11: 0000000000000246 R12: 00007feacb7f03fe
[ 1.351649] r8169 0000:02:00.0 eth0: RTL8168ep/8111ep, 24:4b:fe:c8:7e:6d, XID 502, IRQ 35
[ 1.352626] R13: 000055ce67fc6440 R14: 000055ce67fe9420 R15: 000055ce67fe9760
[ 1.352628] </TASK>
[ 1.352629] Modules linked in: amd_sfh(+) i2c_hid_acpi i2c_hid r8169(+) xhci_pci(+) realtek i2c_piix4 xhci_pci_renesas wmi(+) video(+)
[ 1.353776] r8169 0000:02:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
[ 1.354912] fjes(+) hid
[ 1.359502] CR2: 000000000000000c
[ 1.360640] ---[ end trace 98bea865e3daeb73 ]---
[ 1.361773] RIP: 0010:amd_sfh_hid_client_init+0x47/0x350 [amd_sfh]
[ 1.362911] Code: 00 53 48 83 ec 20 48 8b 5f 08 48 8b 07 48 8d b3 22 01 00 00 4c 8d b0 c8 00 00 00 e8 23 07 00 00 45 31 c0 31 c9 ba 00 00 20 00 <89> 43 0c 48 8d 83 68 01 00 00 48 8d bb 80 01 00 00 48 c7 c6 f0 6d
[ 1.364128] RSP: 0018:ffffa523c0b939e0 EFLAGS: 00010246
[ 1.365338] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 1.366562] RDX: 0000000000200000 RSI: ffffffffc040c249 RDI: ffffffff9300004c
[ 1.367776] RBP: ffffa523c0b93a28 R08: 0000000000000000 R09: 0000000000000006
[ 1.368986] R10: ffffa523c0d00000 R11: 0000000000000007 R12: 0000000fffffffe0
[ 1.370180] R13: ffff8a4ac11c5cd8 R14: ffff8a4ac11570c8 R15: ffff8a4ac11c5cd8
[ 1.371342] FS: 00007feacb0ca8c0(0000) GS:ffff8a4dbf200000(0000) knlGS:0000000000000000
[ 1.372480] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.373613] CR2: 000000000000000c CR3: 0000000117148000 CR4: 0000000000350ef0