Message-ID: <2420af5b-492e-4ecd-a432-5904f097c581@tochlab.net>
Date: Tue, 13 Jan 2026 12:13:23 +0300
From: Dmitrii Tochanskii <tochansky@...hlab.net>
To: Christopher Snowhill <chris@...e54.net>, nouveau@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 Lyude Paul <lyude@...hat.com>, Danilo Krummrich <dakr@...nel.org>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Subject: Re: [BUG] NULL pointer dereference in Nouveau in 6.19 rc3 on boot


On 12/30/25 1:47 AM, Christopher Snowhill wrote:
> On Sun 28 Dec 2025 10:01:21 PM , Christopher Snowhill wrote:
>> On Fri 26 Dec 2025 11:50:55 PM , Christopher Snowhill wrote:
>>> I get the following NULL pointer dereference on boot, shortly before it
>>> would be showing me my LUKS password prompt on a graphical screen. I had
>>> to trust that there was a prompt and log into it blindly to boot and
>>> recover this kernel log snippet.
>>>
>>> This kernel is built using the linux-cachyos-rc package, and only has
>>> minor patches unrelated to DRM code, except that I also applied the
>>> Nouveau ZCULL patch set on top, as well as some downstream sched-ext
>>> patches from Andrea Righi's tree.
>>>
>>> Using latest stable linux-firmware packages from CachyOS, so
>>> 1:20251125-2.
>>>
>>> Should I also have CC'd Maarten Lankhorst? I recall he was retiring from
>>> the maintainer position due to leaving Intel, but get_maintainers.pl
>>> still returns his contact name and address.
>>>
>>> Dec 26 22:52:57 cachyos kernel: nouveau 0000:01:00.0: vgaarb: deactivate vga
>>> console
>>> Dec 26 22:52:57 cachyos kernel: BUG: kernel NULL pointer dereference, address:
>>> 00000000000000cc
>>> Dec 26 22:52:57 cachyos kernel: #PF: supervisor read access in kernel mode
>>> Dec 26 22:52:57 cachyos kernel: #PF: error_code(0x0000) - not-present page
>>> Dec 26 22:52:57 cachyos kernel: PGD 0 P4D 0
>>> Dec 26 22:52:57 cachyos kernel: Oops: Oops: 0000 [#1] SMP NOPTI
>>> Dec 26 22:52:57 cachyos kernel: CPU: 3 UID: 0 PID: 398 Comm: (udev-worker) Not
>>> tainted 6.19.0-rc2-1-cachyos-rc #1 PREEMPT(full)
>>> 71029b2e9fcfeb4957f998851dc3b8eefd7c60f1
>>> Dec 26 22:52:57 cachyos kernel: Hardware name: Micro-Star International Co.,
>>> Ltd. MS-7E16/X670E GAMING PLUS WIFI (MS-7E16), BIOS 1.C7 10/22/2025
>>> Dec 26 22:52:57 cachyos kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
>>> Dec 26 22:52:57 cachyos kernel: Code: 48 88 f2 0f 1f 00 90 90 90 90 90 90 90
>>> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
>>> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b0 00 00 00 83 c6 0a 49 89 d6 48 89
>>> Dec 26 22:52:57 cachyos kernel: RSP: 0018:ffffd13900b73568 EFLAGS: 00010282
>>> Dec 26 22:52:57 cachyos kernel: RAX: ffff8ef7a5429000 RBX: 0000000000000000
>>> RCX: ffffd13900b735ff
>>> Dec 26 22:52:57 cachyos kernel: RDX: ffffd13900b7359a RSI: 0000000000000070
>>> RDI: 0000000000000000
>>> Dec 26 22:52:57 cachyos kernel: RBP: ffff8ef79305d000 R08: ffffd13900b73608
>>> R09: 000000000000001f
>>> Dec 26 22:52:57 cachyos kernel: R10: 0000000000000002 R11: 0000000000010000
>>> R12: ffffd13900b735ff
>>> Dec 26 22:52:57 cachyos kernel: R13: 0000000000000070 R14: ffffd13900b73608
>>> R15: ffffd13900b735fe
>>> Dec 26 22:52:57 cachyos kernel: FS:  00007f830f677840(0000)
>>> GS:ffff8f0ec8730000(0000) knlGS:0000000000000000
>>> Dec 26 22:52:57 cachyos kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
>>> 0000000080050033
>>> Dec 26 22:52:57 cachyos kernel: CR2: 00000000000000cc CR3: 0000000117521000
>>> CR4: 0000000000f50ef0
>>> Dec 26 22:52:57 cachyos kernel: PKRU: 55555554
>>> Dec 26 22:52:57 cachyos kernel: Call Trace:
>>> Dec 26 22:52:57 cachyos kernel:  <TASK>
>>> Dec 26 22:52:57 cachyos kernel:  nvbios_pmuEp+0x51/0x130 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_gsp_fwsec_init+0x76/0x3c0 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  r535_gsp_oneinit+0x2e4/0x1060 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  gh100_gsp_oneinit+0x33b/0x4d0 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_subdev_init_+0x63/0x100 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_subdev_init+0x46/0x60 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_device_init+0x163/0x1e0 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_udevice_init+0x45/0x70 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_object_init+0x42/0x120 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_ioctl_new+0x1d8/0x290 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  ? __pfx_nvkm_client_child_new+0x10/0x10
>>> [nouveau 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  ? __pfx_nvkm_udevice_new+0x10/0x10 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvkm_ioctl+0xba/0x130 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos systemd-udevd[363]: 0000:01:00.0: Worker [398]
>>> terminated by signal 9 (KILL).
>>> Dec 26 22:52:57 cachyos kernel:  nvif_object_ctor+0x114/0x190 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nvif_device_ctor+0x2e/0x70 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nouveau_drm_device_new+0x15c/0x320 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  nouveau_drm_probe+0xbb/0x210 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  ? __pm_runtime_resume+0x59/0x80
>>> Dec 26 22:52:57 cachyos kernel:  pci_device_probe+0x112/0x2d0
>>> Dec 26 22:52:57 cachyos kernel:  really_probe+0xde/0x400
>>> Dec 26 22:52:57 cachyos kernel:  ? __pfx___driver_attach+0x10/0x10
>>> Dec 26 22:52:57 cachyos kernel:  ? __pfx___driver_attach+0x10/0x10
>>> Dec 26 22:52:57 cachyos kernel:  __driver_probe_device+0x78/0x150
>>> Dec 26 22:52:57 cachyos kernel:  __driver_attach+0xa0/0x340
>>> Dec 26 22:52:57 cachyos kernel:  bus_for_each_dev+0x10b/0x160
>>> Dec 26 22:52:57 cachyos kernel:  bus_add_driver+0x131/0x280
>>> Dec 26 22:52:57 cachyos kernel:  ? __pfx_nouveau_drm_init+0x10/0x10 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  driver_register+0x75/0xe0
>>> Dec 26 22:52:57 cachyos kernel:  nouveau_drm_init+0x1b3/0xff0 [nouveau
>>> 92367f81003504f1f8c63f31342b6d203ebdc5d1]
>>> Dec 26 22:52:57 cachyos kernel:  do_one_initcall+0x5b/0x300
>>> Dec 26 22:52:57 cachyos kernel:  do_init_module+0x62/0x250
>>> Dec 26 22:52:57 cachyos kernel:  ? init_module_from_file+0xd6/0x140
>>> Dec 26 22:52:57 cachyos kernel:  init_module_from_file+0xd6/0x140
>>> Dec 26 22:52:57 cachyos kernel:  idempotent_init_module+0x118/0x310
>>> Dec 26 22:52:57 cachyos kernel:  __x64_sys_finit_module+0x71/0xe0
>>> Dec 26 22:52:57 cachyos kernel:  ? syscall_trace_enter+0x91/0x1e0
>>> Dec 26 22:52:57 cachyos kernel:  do_syscall_64+0x81/0x630
>>> Dec 26 22:52:57 cachyos kernel:  ? __x64_sys_pread64+0x9c/0xd0
>>> Dec 26 22:52:57 cachyos kernel:  ? do_syscall_64+0x81/0x630
>>> Dec 26 22:52:57 cachyos kernel:  ? __do_sys_newfstatat+0xe0/0x170
>>> Dec 26 22:52:57 cachyos kernel:  ? do_syscall_64+0x81/0x630
>>> Dec 26 22:52:57 cachyos kernel:  ? irq_exit_rcu+0x55/0x100
>>> Dec 26 22:52:57 cachyos kernel:  entry_SYSCALL_64_after_hwframe+0x79/0x81
>>> Dec 26 22:52:57 cachyos kernel: RIP: 0033:0x7f830ff3c79d
>>> Dec 26 22:52:57 cachyos kernel: Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90
>>> 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 3b 15 0f 00 f7 d8 64 89 01 48
>>> Dec 26 22:52:57 cachyos kernel: RSP: 002b:00007ffc68e73f08 EFLAGS: 00000246
>>> ORIG_RAX: 0000000000000139
>>> Dec 26 22:52:57 cachyos kernel: RAX: ffffffffffffffda RBX: 0000558c285bb2a0
>>> RCX: 00007f830ff3c79d
>>> Dec 26 22:52:57 cachyos kernel: RDX: 0000000000000004 RSI: 00007f830f6222f2
>>> RDI: 000000000000003f
>>> Dec 26 22:52:57 cachyos kernel: RBP: 00007ffc68e73fa0 R08: 0000000000000000
>>> R09: 0000558c285bc240
>>> Dec 26 22:52:57 cachyos kernel: R10: 0000000000000000 R11: 0000000000000246
>>> R12: 00007f830f6222f2
>>> Dec 26 22:52:57 cachyos kernel: R13: 0000000000020000 R14: 0000558c2853b7a0
>>> R15: 0000558c285bb2a0
>>> Dec 26 22:52:57 cachyos kernel:  </TASK>
>>> Dec 26 22:52:57 cachyos kernel: Modules linked in: dm_mod nouveau(+)
>>> drm_ttm_helper ttm gpu_sched hid_playstation(+) i2c_algo_bit uas nvme
>>> ghash_clmulni_intel drm_gpuvm led_class_multicolor usb_storage aesni_intel
>>> drm_exec ff_memless nvme_core mxm_wmi ccp nvme_keyring drm_display_helper
>>> nvme_auth hid_multitouch hid_logitech_dj(+) video hkdf cec wmi
>>> Dec 26 22:52:57 cachyos kernel: CR2: 00000000000000cc
>>> Dec 26 22:52:57 cachyos kernel: ---[ end trace 0000000000000000 ]---
>>> Dec 26 22:52:57 cachyos kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
>>> Dec 26 22:52:57 cachyos kernel: Code: 48 88 f2 0f 1f 00 90 90 90 90 90 90 90
>>> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
>>> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b0 00 00 00 83 c6 0a 49 89 d6 48 89
>>> Dec 26 22:52:57 cachyos kernel: RSP: 0018:ffffd13900b73568 EFLAGS: 00010282
>>> Dec 26 22:52:57 cachyos kernel: RAX: ffff8ef7a5429000 RBX: 0000000000000000
>>> RCX: ffffd13900b735ff
>>> Dec 26 22:52:57 cachyos kernel: RDX: ffffd13900b7359a RSI: 0000000000000070
>>> RDI: 0000000000000000
>>> Dec 26 22:52:57 cachyos kernel: RBP: ffff8ef79305d000 R08: ffffd13900b73608
>>> R09: 000000000000001f
>>> Dec 26 22:52:57 cachyos kernel: R10: 0000000000000002 R11: 0000000000010000
>>> R12: ffffd13900b735ff
>>> Dec 26 22:52:57 cachyos kernel: R13: 0000000000000070 R14: ffffd13900b73608
>>> R15: ffffd13900b735fe
>>> Dec 26 22:52:57 cachyos kernel: FS:  00007f830f677840(0000)
>>> GS:ffff8f0ec8730000(0000) knlGS:0000000000000000
>>> Dec 26 22:52:57 cachyos kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
>>> 0000000080050033
>>> Dec 26 22:52:57 cachyos kernel: CR2: 00000000000000cc CR3: 0000000117521000
>>> CR4: 0000000000f50ef0
>>> Dec 26 22:52:57 cachyos kernel: PKRU: 55555554
>>> Dec 26 22:52:57 cachyos kernel: note: (udev-worker)[398] exited with irqs
>>> disabled
>>>
>> Still crashing with 6.19 rc3. I have to use the proprietary drivers to
>> have a desktop, but I probably should be using those anyway.
>>
>> Dec 28 21:47:18 cachyos kernel: BUG: kernel NULL pointer dereference, address:
>> 00000000000000cc
>> Dec 28 21:47:18 cachyos kernel: #PF: supervisor read access in kernel mode
>> Dec 28 21:47:18 cachyos kernel: #PF: error_code(0x0000) - not-present page
>> Dec 28 21:47:18 cachyos kernel: PGD 0 P4D 0
>> Dec 28 21:47:18 cachyos kernel: Oops: Oops: 0000 [#1] SMP NOPTI
>> Dec 28 21:47:18 cachyos kernel: CPU: 3 UID: 0 PID: 410 Comm: (udev-worker) Not
>> tainted 6.19.0-rc3-1-cachyos-rc #1 PREEMPT(full)
>> 048c9ac8e7cc8ed3d1ec452c3a62bf8817030490
>> Dec 28 21:47:18 cachyos kernel: Hardware name: Micro-Star International Co.,
>> Ltd. MS-7E16/X670E GAMING PLUS WIFI (MS-7E16), BIOS 1.C7 10/22/2025
>> Dec 28 21:47:18 cachyos kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
>> Dec 28 21:47:18 cachyos kernel: Code: 48 08 f4 0f 1f 00 90 90 90 90 90 90 90
>> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
>> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b0 00 00 00 83 c6 0a 49 89 d6 48 89
>> Dec 28 21:47:18 cachyos kernel: RSP: 0018:ffffd1e280bdb6f8 EFLAGS: 00010286
>> Dec 28 21:47:18 cachyos kernel: RAX: ffff8bec90f54800 RBX: 0000000000000000
>> RCX: ffffd1e280bdb78f
>> Dec 28 21:47:18 cachyos kernel: RDX: ffffd1e280bdb72a RSI: 0000000000000070
>> RDI: 0000000000000000
>> Dec 28 21:47:18 cachyos kernel: RBP: ffff8beca75a1000 R08: ffffd1e280bdb798
>> R09: 000000000000001f
>> Dec 28 21:47:18 cachyos kernel: R10: 0000000000000002 R11: 0000000000010000
>> R12: ffffd1e280bdb78f
>> Dec 28 21:47:18 cachyos kernel: R13: 0000000000000070 R14: ffffd1e280bdb798
>> R15: ffffd1e280bdb78e
>> Dec 28 21:47:18 cachyos kernel: FS:  00007f1ad28a2840(0000)
>> GS:ffff8c03c7130000(0000) knlGS:0000000000000000
>> Dec 28 21:47:18 cachyos kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Dec 28 21:47:18 cachyos kernel: CR2: 00000000000000cc CR3: 00000001184a6000
>> CR4: 0000000000f50ef0
>> Dec 28 21:47:18 cachyos kernel: PKRU: 55555554
>> Dec 28 21:47:18 cachyos kernel: Call Trace:
>> Dec 28 21:47:18 cachyos kernel:  <TASK>
>> Dec 28 21:47:18 cachyos kernel:  nvbios_pmuEp+0x51/0x130 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_gsp_fwsec_init+0x76/0x3c0 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  r535_gsp_oneinit+0x2e4/0x1060 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  gh100_gsp_oneinit+0x33b/0x4d0 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_subdev_init_+0x63/0x100 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_subdev_init+0x46/0x60 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_device_init+0x163/0x1e0 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_udevice_init+0x45/0x70 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_object_init+0x42/0x120 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_ioctl_new+0x1d8/0x290 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  ? __pfx_nvkm_client_child_new+0x10/0x10
>> [nouveau 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  ? __pfx_nvkm_udevice_new+0x10/0x10 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvkm_ioctl+0xba/0x130 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvif_object_ctor+0x114/0x190 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nvif_device_ctor+0x2e/0x70 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nouveau_drm_device_new+0x15c/0x320 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  nouveau_drm_probe+0xbb/0x210 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  ? __pm_runtime_resume+0x59/0x80
>> Dec 28 21:47:18 cachyos kernel:  pci_device_probe+0x112/0x2d0
>> Dec 28 21:47:18 cachyos kernel:  really_probe+0xde/0x400
>> Dec 28 21:47:18 cachyos kernel:  ? __pfx___driver_attach+0x10/0x10
>> Dec 28 21:47:18 cachyos kernel:  ? __pfx___driver_attach+0x10/0x10
>> Dec 28 21:47:18 cachyos kernel:  __driver_probe_device+0x78/0x150
>> Dec 28 21:47:18 cachyos kernel:  __driver_attach+0xa0/0x340
>> Dec 28 21:47:18 cachyos kernel:  bus_for_each_dev+0x10b/0x160
>> Dec 28 21:47:18 cachyos kernel:  bus_add_driver+0x131/0x280
>> Dec 28 21:47:18 cachyos kernel:  ? __pfx_nouveau_drm_init+0x10/0x10 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  driver_register+0x75/0xe0
>> Dec 28 21:47:18 cachyos kernel:  nouveau_drm_init+0x1b3/0xff0 [nouveau
>> 52ba080e4b7b95996467b34d4d25c4c6ce5aa54d]
>> Dec 28 21:47:18 cachyos kernel:  do_one_initcall+0x5b/0x300
>> Dec 28 21:47:18 cachyos kernel:  do_init_module+0x62/0x250
>> Dec 28 21:47:18 cachyos kernel:  ? init_module_from_file+0xd6/0x140
>> Dec 28 21:47:18 cachyos kernel:  init_module_from_file+0xd6/0x140
>> Dec 28 21:47:18 cachyos kernel:  idempotent_init_module+0x118/0x310
>> Dec 28 21:47:18 cachyos kernel:  __x64_sys_finit_module+0x71/0xe0
>> Dec 28 21:47:18 cachyos systemd-udevd[360]: 0000:01:00.0: Worker [410]
>> terminated by signal 9 (KILL).
>> Dec 28 21:47:18 cachyos kernel:  ? syscall_trace_enter+0x91/0x1e0
>> Dec 28 21:47:18 cachyos kernel:  do_syscall_64+0x81/0x630
>> Dec 28 21:47:18 cachyos kernel:  ? do_syscall_64+0x81/0x630
>> Dec 28 21:47:18 cachyos kernel:  ? irq_exit_rcu+0x55/0x100
>> Dec 28 21:47:18 cachyos kernel:  entry_SYSCALL_64_after_hwframe+0x79/0x81
>> Dec 28 21:47:18 cachyos kernel: RIP: 0033:0x7f1ad316779d
>> Dec 28 21:47:18 cachyos kernel: Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90
>> 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 3b 15 0f 00 f7 d8 64 89 01 48
>> Dec 28 21:47:18 cachyos kernel: RSP: 002b:00007ffe71df2278 EFLAGS: 00000246
>> ORIG_RAX: 0000000000000139
>> Dec 28 21:47:18 cachyos kernel: RAX: ffffffffffffffda RBX: 000055cb0eb476a0
>> RCX: 00007f1ad316779d
>> Dec 28 21:47:18 cachyos kernel: RDX: 0000000000000004 RSI: 00007f1ad284d2f2
>> RDI: 000000000000005d
>> Dec 28 21:47:18 cachyos kernel: RBP: 00007ffe71df2310 R08: 0000000000000000
>> R09: 000055cb0eb49a70
>> Dec 28 21:47:18 cachyos kernel: R10: 0000000000000000 R11: 0000000000000246
>> R12: 00007f1ad284d2f2
>> Dec 28 21:47:18 cachyos kernel: R13: 0000000000020000 R14: 000055cb0eadd7c0
>> R15: 000055cb0eb476a0
>> Dec 28 21:47:18 cachyos kernel:  </TASK>
>> Dec 28 21:47:18 cachyos kernel: Modules linked in: dm_mod nouveau(+)
>> drm_ttm_helper ttm gpu_sched uas i2c_algo_bit hid_playstation
>> ghash_clmulni_intel drm_gpuvm nvme usb_storage led_class_multicolor drm_exec
>> aesni_intel ff_memless mxm_wmi nvme_core ccp nvme_keyring drm_display_helper
>> nvme_auth hid_logitech_dj hid_multitouch cec hkdf video wmi
>> Dec 28 21:47:18 cachyos kernel: CR2: 00000000000000cc
>> Dec 28 21:47:18 cachyos kernel: ---[ end trace 0000000000000000 ]---
>> Dec 28 21:47:18 cachyos kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
>> Dec 28 21:47:18 cachyos kernel: Code: 48 08 f4 0f 1f 00 90 90 90 90 90 90 90
>> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
>> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b0 00 00 00 83 c6 0a 49 89 d6 48 89
>> Dec 28 21:47:18 cachyos kernel: RSP: 0018:ffffd1e280bdb6f8 EFLAGS: 00010286
>> Dec 28 21:47:18 cachyos kernel: RAX: ffff8bec90f54800 RBX: 0000000000000000
>> RCX: ffffd1e280bdb78f
>> Dec 28 21:47:18 cachyos kernel: RDX: ffffd1e280bdb72a RSI: 0000000000000070
>> RDI: 0000000000000000
>> Dec 28 21:47:18 cachyos kernel: RBP: ffff8beca75a1000 R08: ffffd1e280bdb798
>> R09: 000000000000001f
>> Dec 28 21:47:18 cachyos kernel: R10: 0000000000000002 R11: 0000000000010000
>> R12: ffffd1e280bdb78f
>> Dec 28 21:47:18 cachyos kernel: R13: 0000000000000070 R14: ffffd1e280bdb798
>> R15: ffffd1e280bdb78e
>> Dec 28 21:47:18 cachyos kernel: FS:  00007f1ad28a2840(0000)
>> GS:ffff8c03c7130000(0000) knlGS:0000000000000000
>> Dec 28 21:47:18 cachyos kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Dec 28 21:47:18 cachyos kernel: CR2: 00000000000000cc CR3: 00000001184a6000
>> CR4: 0000000000f50ef0
>> Dec 28 21:47:18 cachyos kernel: PKRU: 55555554
>> Dec 28 21:47:18 cachyos kernel: note: (udev-worker)[410] exited with irqs
>> disabled
>>
>> Does this new kernel require bleeding edge linux-firmware for nvidia?
> Replicated the issue on linux-mainline, so it's not cachyos patches
> causing the problem. Another user has failed to replicate it on various
> 6.19 versions (rc1, rc3) using a 3000 series GPU, so it's likely
> Blackwell specific, as I have a 5070 Ti.
>
> The crash on linux-mainline was complicated by the mt76 string overflow
> issue that still isn't patched in RC3, though.
>
> Dec 28 23:01:13 archlinux kernel: BUG: kernel NULL pointer dereference,
> address: 00000000000000cc
> Dec 28 23:01:13 archlinux kernel: #PF: supervisor read access in kernel mode
> Dec 28 23:01:13 archlinux kernel: #PF: error_code(0x0000) - not-present page
> Dec 28 23:01:13 archlinux kernel: PGD 0 P4D 0
> Dec 28 23:01:13 archlinux kernel: Oops: Oops: 0000 [#1] SMP NOPTI
> Dec 28 23:01:13 archlinux kernel: CPU: 3 UID: 0 PID: 432 Comm: (udev-worker)
> Not tainted 6.19.0-rc3-1-mainline-dirty #1 PREEMPT(full)
> 6f31553276eb8f2de91bc301e09f6c7cde02609a
> Dec 28 23:01:13 archlinux kernel: Hardware name: Micro-Star International Co.,
> Ltd. MS-7E16/X670E GAMING PLUS WIFI (MS-7E16), BIOS 1.C7 10/22/2025
> Dec 28 23:01:13 archlinux kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
> Dec 28 23:01:13 archlinux kernel: Code: ff e8 80 0b 73 f8 90 90 90 90 90 90 90
> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b1 00 00 00 83 c6 0a 49 89 d6 48 89
> Dec 28 23:01:13 archlinux kernel: RSP: 0018:ffffcccc815074b8 EFLAGS: 00010296
> Dec 28 23:01:13 archlinux kernel: RAX: 0000000000000000 RBX: 0000000000000000
> RCX: ffffcccc81507536
> Dec 28 23:01:13 archlinux kernel: RDX: ffffcccc815074f2 RSI: 0000000000000070
> RDI: 0000000000000000
> Dec 28 23:01:13 archlinux kernel: RBP: ffffcccc81507536 R08: ffffcccc81507537
> R09: 0000000000001000
> Dec 28 23:01:13 archlinux kernel: R10: 000000009ffdf000 R11: 0000000000000002
> R12: ffffcccc81507537
> Dec 28 23:01:13 archlinux kernel: R13: 0000000000000070 R14: ffffcccc8150758e
> R15: ffffcccc8150758f
> Dec 28 23:01:13 archlinux kernel: FS:  00007f175c3b8840(0000)
> GS:ffff8aef0298c000(0000) knlGS:0000000000000000
> Dec 28 23:01:13 archlinux kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> Dec 28 23:01:13 archlinux kernel: CR2: 00000000000000cc CR3: 0000000116f96000
> CR4: 0000000000f50ef0
> Dec 28 23:01:13 archlinux kernel: PKRU: 55555554
> Dec 28 23:01:13 archlinux kernel: Call Trace:
> Dec 28 23:01:13 archlinux kernel:  <TASK>
> Dec 28 23:01:13 archlinux kernel:  nvbios_pmuTe+0x4f/0xf0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvbios_pmuEp+0x4d/0xc0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_gsp_fwsec_init+0x77/0x3c0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  r535_gsp_oneinit+0x25e/0xf90 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? gh100_gsp_oneinit+0x288/0x420 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  gh100_gsp_oneinit+0x2bc/0x420 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_subdev_oneinit_+0x43/0x90 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? ktime_get+0x3b/0xd0
> Dec 28 23:01:13 archlinux kernel:  nvkm_subdev_init_+0x31/0xa0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? nvkm_intr_rearm+0xc4/0x1c0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_subdev_init+0x46/0x60 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_device_init+0x163/0x1e0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_udevice_init+0x45/0x70 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_object_init+0x42/0x120 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_ioctl_new+0x15c/0x220 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? __pfx_nvkm_client_child_new+0x10/0x10
> [nouveau 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? __pfx_nvkm_udevice_new+0x10/0x10 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvkm_ioctl+0xba/0x130 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvif_object_ctor+0x114/0x190 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nvif_device_ctor+0x2e/0x70 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  nouveau_drm_device_new+0x15c/0x320 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? __pci_set_master+0x5e/0xe0
> Dec 28 23:01:13 archlinux kernel:  nouveau_drm_probe+0xb9/0x210 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  ? __pm_runtime_resume+0x5f/0x90
> Dec 28 23:01:13 archlinux kernel:  local_pci_probe+0x42/0x90
> Dec 28 23:01:13 archlinux kernel:  pci_device_probe+0xda/0x280
> Dec 28 23:01:13 archlinux kernel:  ? sysfs_do_create_link_sd+0x6d/0xd0
> Dec 28 23:01:13 archlinux kernel:  really_probe+0xde/0x380
> Dec 28 23:01:13 archlinux kernel:  __driver_probe_device+0x78/0x150
> Dec 28 23:01:13 archlinux kernel:  driver_probe_device+0x1f/0xa0
> Dec 28 23:01:13 archlinux kernel:  ? __pfx___driver_attach+0x10/0x10
> Dec 28 23:01:13 archlinux kernel:  __driver_attach+0xcb/0x200
> Dec 28 23:01:13 archlinux kernel:  bus_for_each_dev+0x85/0xd0
> Dec 28 23:01:13 archlinux kernel:  bus_add_driver+0x118/0x200
> Dec 28 23:01:13 archlinux kernel:  ? __pfx_nouveau_drm_init+0x10/0x10 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  driver_register+0x75/0xe0
> Dec 28 23:01:13 archlinux kernel:  nouveau_drm_init+0x1b3/0xff0 [nouveau
> 1ced2b39f8fa9b515ea0f917e46ab5fde01df79e]
> Dec 28 23:01:13 archlinux kernel:  do_one_initcall+0x5b/0x300
> Dec 28 23:01:13 archlinux kernel:  do_init_module+0x62/0x250
> Dec 28 23:01:13 archlinux systemd-udevd[359]: 0000:01:00.0: Worker [432]
> terminated by signal 9 (KILL).
> Dec 28 23:01:13 archlinux kernel:  init_module_from_file+0xd8/0x140
> Dec 28 23:01:13 archlinux kernel:  idempotent_init_module+0x114/0x310
> Dec 28 23:01:13 archlinux kernel:  __x64_sys_finit_module+0x71/0xe0
> Dec 28 23:01:13 archlinux kernel:  ? syscall_trace_enter+0x8d/0x1d0
> Dec 28 23:01:13 archlinux kernel:  do_syscall_64+0x81/0x610
> Dec 28 23:01:13 archlinux kernel:  ? do_sys_openat2+0xac/0xf0
> Dec 28 23:01:13 archlinux kernel:  ? __x64_sys_openat+0x61/0xa0
> Dec 28 23:01:13 archlinux kernel:  ? do_syscall_64+0x81/0x610
> Dec 28 23:01:13 archlinux kernel:  ? do_sys_openat2+0xac/0xf0
> Dec 28 23:01:13 archlinux kernel:  ? __x64_sys_openat+0x61/0xa0
> Dec 28 23:01:13 archlinux kernel:  ? do_syscall_64+0x81/0x610
> Dec 28 23:01:13 archlinux kernel:  ? __x64_sys_openat+0x61/0xa0
> Dec 28 23:01:13 archlinux kernel:  ? do_syscall_64+0x81/0x610
> Dec 28 23:01:13 archlinux kernel:  ? sched_clock+0x10/0x30
> Dec 28 23:01:13 archlinux kernel:  ? sched_clock_cpu+0xf/0x200
> Dec 28 23:01:13 archlinux kernel:  ?
> __flush_smp_call_function_queue+0xae/0x410
> Dec 28 23:01:13 archlinux kernel:  ? sched_clock_cpu+0xf/0x200
> Dec 28 23:01:13 archlinux kernel:  ? irqtime_account_irq+0x3c/0xc0
> Dec 28 23:01:13 archlinux kernel:  ? __irq_exit_rcu+0x4c/0xf0
> Dec 28 23:01:13 archlinux kernel:  entry_SYSCALL_64_after_hwframe+0x76/0x7e
> Dec 28 23:01:13 archlinux kernel: RIP: 0033:0x7f175cc7d79d
> Dec 28 23:01:13 archlinux kernel: Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90
> 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 3b 15 0f 00 f7 d8 64 89 01 48
> Dec 28 23:01:13 archlinux kernel: RSP: 002b:00007ffeea4f46a8 EFLAGS: 00000246
> ORIG_RAX: 0000000000000139
> Dec 28 23:01:13 archlinux kernel: RAX: ffffffffffffffda RBX: 0000561d180f9e90
> RCX: 00007f175cc7d79d
> Dec 28 23:01:13 archlinux kernel: RDX: 0000000000000004 RSI: 00007f175c3632f2
> RDI: 000000000000008d
> Dec 28 23:01:13 archlinux kernel: RBP: 00007ffeea4f4740 R08: 0000000000000000
> R09: 0000561d180fd7d0
> Dec 28 23:01:13 archlinux kernel: R10: 0000000000000000 R11: 0000000000000246
> R12: 00007f175c3632f2
> Dec 28 23:01:13 archlinux kernel: R13: 0000000000020000 R14: 0000561d180f9210
> R15: 0000561d180f9e90
> Dec 28 23:01:13 archlinux kernel:  </TASK>
> Dec 28 23:01:13 archlinux kernel: Modules linked in: dm_mod nouveau(+)
> drm_ttm_helper ttm gpu_sched uas hid_playstation i2c_algo_bit
> ghash_clmulni_intel nvme usb_storage drm_gpuvm led_class_multicolor
> aesni_intel ff_memless drm_exec nvme_core mxm_wmi ccp nvme_keyring
> drm_display_helper nvme_auth hid_logitech_dj(+) video hkdf hid_multitouch cec
> wmi
> Dec 28 23:01:13 archlinux kernel: CR2: 00000000000000cc
> Dec 28 23:01:13 archlinux kernel: ---[ end trace 0000000000000000 ]---
> Dec 28 23:01:13 archlinux kernel: RIP: 0010:bit_entry+0x14/0xf0 [nouveau]
> Dec 28 23:01:13 archlinux kernel: Code: ff e8 80 0b 73 f8 90 90 90 90 90 90 90
> 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 0f 1f 44 00 00 41 56 41 55 41 89 f5 41
> 54 55 53 <8b> b7 cc 00 00 00 85 f6 0f 84 b1 00 00 00 83 c6 0a 49 89 d6 48 89
> Dec 28 23:01:13 archlinux kernel: RSP: 0018:ffffcccc815074b8 EFLAGS: 00010296
> Dec 28 23:01:13 archlinux kernel: RAX: 0000000000000000 RBX: 0000000000000000
> RCX: ffffcccc81507536
> Dec 28 23:01:13 archlinux kernel: RDX: ffffcccc815074f2 RSI: 0000000000000070
> RDI: 0000000000000000
> Dec 28 23:01:13 archlinux kernel: RBP: ffffcccc81507536 R08: ffffcccc81507537
> R09: 0000000000001000
> Dec 28 23:01:13 archlinux kernel: R10: 000000009ffdf000 R11: 0000000000000002
> R12: ffffcccc81507537
> Dec 28 23:01:13 archlinux kernel: R13: 0000000000000070 R14: ffffcccc8150758e
> R15: ffffcccc8150758f
> Dec 28 23:01:13 archlinux kernel: FS:  00007f175c3b8840(0000)
> GS:ffff8aef0298c000(0000) knlGS:0000000000000000
> Dec 28 23:01:13 archlinux kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> Dec 28 23:01:13 archlinux kernel: CR2: 00000000000000cc CR3: 0000000116f96000
> CR4: 0000000000f50ef0
> Dec 28 23:01:13 archlinux kernel: PKRU: 55555554
> Dec 28 23:01:13 archlinux kernel: note: (udev-worker)[432] exited with irqs
> disabled
>
I started having the same error when upgrading from 6.18.3 to 6.18.4 on 
RTX 5080.

Bug line is drivers/gpu/drm/nouveau/nvkm/subdev/bios/bit.c:30 because 
'bios' is NULL.

Not sure where it has to be set but in 
drivers/gpu/drm/nouveau/nvkm/subdev/gsp/fwsec.c:266 it's NULL.

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