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Sat, 27 Dec 2025 02:50:57 -0500 (EST) From: Christopher Snowhill To: nouveau@lists.freedesktop.org CC: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Lyude Paul , Danilo Krummrich , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Subject: NULL pointer dereference in Nouveau in 6.19 rc2 on boot Message-ID: <176682185563.8256.115798774340102079@copycat> User-Agent: Dodo Date: Fri, 26 Dec 2025 23:50:55 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg="pgp-sha512"; boundary="===============3980477359181962303==" --===============3980477359181962303== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit 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: 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: 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 --===============3980477359181962303== Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" MIME-Version: 1.0 -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEdiLr51NrDwQ29PFjjWyYR59K3nEFAmlPj98ACgkQjWyYR59K 3nFNzxAAiqwHRToqG7+yGVfeohcIzuTM/J35RWz0KDKGRFc/KgpjB0qEVg0qxGkp jaamJ6eib7+G9k9Wsk12pZhyOKVXwp9F5i2STMAwY6P5BJnrH4r2Nzh2Mv2wfFwB x8dLAUDXh3vTqRy67C/te6pI3sf6Rve56ao97pm0FlW9MZAwvu+QaNw5YMin+jWY FAcMZe508nlhckjtwn5/IzYQwsQl5Ii1XUlq9KxTQNmtsEk0a7VHWACACvzIbMuT VksTTcCCe4iYb9z8Vxd0cZJHj0OxV6i523GU80yLeXQyQHeGnCQDU4vrzbzvkg/D KAJHyPE2LZrM2QSdfBDocVIziopehvQPAlCS2BHCLd4uK8/rE20d6NGpgJyXhwlu Tf1UUgD5hyzGYSbZdGd26s4oYGL3Hshy+JBGEtuF1HyEUsW0jjkkRMGpvqn/Fy/q 6B/WNFDGKAPg8UVK/hFABIR98suI7FSA6wFzwckp8wUNcf+q5AnTbeTQGimymoOk YKIfNZzLSY0UC5t2gnMdHubxlVrk0+4DnZ9od/dAuKWsfmgRxD8axMPdL+PEbNHs ATpgXq3mOpQs6+QIZAnKRZ69bsV+rC5SAqz89trshZ/ggeUxHKWoCxaKpYYbfiOg MxI3ggUqfhiRW2fS1oWfW22hlIxTd29pM/K/cU+r2HYfbpPDfs8= =zaIr -----END PGP SIGNATURE----- --===============3980477359181962303==--