Hi, Unfortunately, I was not able to reboot in this kernel again to do the stack decode, but I thought that any information about the NULL pointer dereference is better than no info. The system is Ubuntu 23.10 Mantic with AMD product: Navi 23 [Radeon RX 6600/6600 XT/6600M] graphic card. Please find the config and the hw listing attached. Best regards, Mirsad kernel: [ 5.576702] BUG: kernel NULL pointer dereference, address: 0000000000000008 kernel: [ 5.576707] #PF: supervisor read access in kernel mode kernel: [ 5.576710] #PF: error_code(0x0000) - not-present page kernel: [ 5.576712] PGD 0 P4D 0 kernel: [ 5.576715] Oops: 0000 [#1] PREEMPT SMP NOPTI kernel: [ 5.576718] CPU: 9 PID: 650 Comm: systemd-udevd Not tainted 6.7.0-rtl-v0.2-nokcsan-09928-g052d534373b7 #2 kernel: [ 5.576723] Hardware name: ASRock X670E PG Lightning/X670E PG Lightning, BIOS 1.21 04/26/2023 kernel: [ 5.576726] RIP: 0010:gfx_v10_0_early_init+0x5ab/0x8d0 [amdgpu] kernel: [ 5.576872] Code: 8d 55 a8 4c 89 ff e8 e4 83 ec ff 41 89 c2 83 f8 ed 0f 84 b3 fd ff ff 85 c0 74 05 0f 1f 44 00 00 49 8b 87 08 87 01 00 4c 89 ff <48> 8b 40 08 0f b7 50 0a 0f b7 70 08 e8 e4 42 fb ff 41 89 c2 85 c0 kernel: [ 5.576878] RSP: 0018:ffffa5b3c103f720 EFLAGS: 00010282 kernel: [ 5.576881] RAX: 0000000000000000 RBX: ffffffffc1d73489 RCX: 0000000000000000 kernel: [ 5.576884] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff91ae4fa80000 kernel: [ 5.576886] RBP: ffffa5b3c103f7b0 R08: 0000000000000000 R09: 0000000000000000 kernel: [ 5.576889] R10: 00000000ffffffea R11: 0000000000000000 R12: ffff91ae4fa986e8 kernel: [ 5.576892] R13: ffff91ae4fa986d8 R14: ffff91ae4fa986f8 R15: ffff91ae4fa80000 kernel: [ 5.576895] FS: 00007fdaa343c8c0(0000) GS:ffff91bd58440000(0000) knlGS:0000000000000000 kernel: [ 5.576898] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: [ 5.576900] CR2: 0000000000000008 CR3: 00000001222d0000 CR4: 0000000000750ef0 kernel: [ 5.576903] PKRU: 55555554 kernel: [ 5.576905] Call Trace: kernel: [ 5.576907] kernel: [ 5.576909] ? show_regs+0x72/0x90 kernel: [ 5.576914] ? __die+0x25/0x80 kernel: [ 5.576917] ? page_fault_oops+0x154/0x4c0 kernel: [ 5.576921] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.576925] ? crypto_alloc_tfmmem.isra.0+0x35/0x70 kernel: [ 5.576930] ? do_user_addr_fault+0x30e/0x6e0 kernel: [ 5.576934] ? exc_page_fault+0x84/0x1b0 kernel: [ 5.576937] ? asm_exc_page_fault+0x27/0x30 kernel: [ 5.576942] ? gfx_v10_0_early_init+0x5ab/0x8d0 [amdgpu] kernel: [ 5.577056] amdgpu_device_init+0xefa/0x2de0 [amdgpu] kernel: [ 5.577158] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577161] ? pci_bus_read_config_word+0x47/0x90 kernel: [ 5.577166] ? pci_read_config_word+0x27/0x60 kernel: [ 5.577168] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577171] ? do_pci_enable_device+0xe1/0x110 kernel: [ 5.577176] amdgpu_driver_load_kms+0x1a/0x1c0 [amdgpu] kernel: [ 5.577275] amdgpu_pci_probe+0x1a8/0x5e0 [amdgpu] kernel: [ 5.577373] local_pci_probe+0x48/0xb0 kernel: [ 5.577377] pci_device_probe+0xc8/0x290 kernel: [ 5.577381] really_probe+0x1d2/0x440 kernel: [ 5.577386] __driver_probe_device+0x8a/0x190 kernel: [ 5.577389] driver_probe_device+0x23/0xd0 kernel: [ 5.577392] __driver_attach+0x10f/0x220 kernel: [ 5.577396] ? __pfx___driver_attach+0x10/0x10 kernel: [ 5.577399] bus_for_each_dev+0x7a/0xe0 kernel: [ 5.577402] driver_attach+0x1e/0x30 kernel: [ 5.577405] bus_add_driver+0x127/0x240 kernel: [ 5.577409] driver_register+0x64/0x140 kernel: [ 5.577411] ? __pfx_amdgpu_init+0x10/0x10 [amdgpu] kernel: [ 5.577521] __pci_register_driver+0x68/0x80 kernel: [ 5.577524] amdgpu_init+0x69/0xff0 [amdgpu] kernel: [ 5.577628] do_one_initcall+0x46/0x330 kernel: [ 5.577632] ? kmalloc_trace+0x136/0x370 kernel: [ 5.577637] do_init_module+0x6a/0x280 kernel: [ 5.577640] load_module+0x2419/0x2500 kernel: [ 5.577647] init_module_from_file+0x9c/0xf0 kernel: [ 5.577649] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577652] ? init_module_from_file+0x9c/0xf0 kernel: [ 5.577657] idempotent_init_module+0x184/0x240 kernel: [ 5.577661] __x64_sys_finit_module+0x64/0xd0 kernel: [ 5.577664] do_syscall_64+0x76/0x140 kernel: [ 5.577668] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577671] ? ksys_mmap_pgoff+0x123/0x270 kernel: [ 5.577675] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577678] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577681] ? syscall_exit_to_user_mode+0x97/0x1e0 kernel: [ 5.577684] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577687] ? do_syscall_64+0x85/0x140 kernel: [ 5.577689] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577692] ? do_syscall_64+0x85/0x140 kernel: [ 5.577695] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577698] ? do_syscall_64+0x85/0x140 kernel: [ 5.577700] ? srso_alias_return_thunk+0x5/0xfbef5 kernel: [ 5.577703] ? sysvec_call_function+0x4e/0xb0 kernel: [ 5.577707] entry_SYSCALL_64_after_hwframe+0x6e/0x76 kernel: [ 5.577709] RIP: 0033:0x7fdaa331e88d kernel: [ 5.577724] 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 73 b5 0f 00 f7 d8 64 89 01 48 kernel: [ 5.577729] RSP: 002b:00007ffeb4f87d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 kernel: [ 5.577733] RAX: ffffffffffffffda RBX: 000055aedf3eeeb0 RCX: 00007fdaa331e88d kernel: [ 5.577736] RDX: 0000000000000000 RSI: 000055aedf3efb80 RDI: 000000000000001a kernel: [ 5.577738] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000002 kernel: [ 5.577741] R10: 000000000000001a R11: 0000000000000246 R12: 000055aedf3efb80 kernel: [ 5.577744] R13: 000055aedf3f2060 R14: 0000000000000000 R15: 000055aedf2b1220 kernel: [ 5.577748] kernel: [ 5.577750] Modules linked in: intel_rapl_msr intel_rapl_common amdgpu(+) edac_mce_amd kvm_amd kvm snd_hda_codec_realtek snd_hda_codec_generic irqbypass ledtrig_audio crct10dif_pclmul polyval_clmulni polyval_generic snd_hda_codec_hdmi ghash_clmulni_intel sha512_ssse3 sha256_ssse3 sha1_ssse3 amdxcp snd_hda_intel aesni_intel drm_exec snd_intel_dspcfg crypto_simd gpu_sched snd_intel_sdw_acpi cryptd nls_iso8859_1 drm_buddy snd_hda_codec snd_seq_midi drm_suballoc_helper snd_seq_midi_event drm_ttm_helper joydev snd_hda_core input_leds ttm rapl snd_rawmidi snd_hwdep drm_display_helper snd_seq snd_pcm wmi_bmof cec k10temp snd_seq_device ccp rc_core snd_timer snd drm_kms_helper i2c_algo_bit soundcore mac_hid tcp_bbr sch_fq msr parport_pc ppdev lp drm parport efi_pstore ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c hid_generic usbhid hid crc32_pclmul nvme r8169 ahci nvme_core i2c_piix4 xhci_pci libahci xhci_pci_renesas realtek video wmi gpio_amdpt kernel: [ 5.577817] CR2: 0000000000000008 kernel: [ 5.577820] ---[ end trace 0000000000000000 ]--- kernel: [ 5.914230] RIP: 0010:gfx_v10_0_early_init+0x5ab/0x8d0 [amdgpu] kernel: [ 5.914388] Code: 8d 55 a8 4c 89 ff e8 e4 83 ec ff 41 89 c2 83 f8 ed 0f 84 b3 fd ff ff 85 c0 74 05 0f 1f 44 00 00 49 8b 87 08 87 01 00 4c 89 ff <48> 8b 40 08 0f b7 50 0a 0f b7 70 08 e8 e4 42 fb ff 41 89 c2 85 c0 rsyslogd: rsyslogd's groupid changed to 111 kernel: [ 5.914394] RSP: 0018:ffffa5b3c103f720 EFLAGS: 00010282 kernel: [ 5.914397] RAX: 0000000000000000 RBX: ffffffffc1d73489 RCX: 0000000000000000 kernel: [ 5.914399] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff91ae4fa80000 kernel: [ 5.914402] RBP: ffffa5b3c103f7b0 R08: 0000000000000000 R09: 0000000000000000 kernel: [ 5.914405] R10: 00000000ffffffea R11: 0000000000000000 R12: ffff91ae4fa986e8 kernel: [ 5.914408] R13: ffff91ae4fa986d8 R14: ffff91ae4fa986f8 R15: ffff91ae4fa80000 kernel: [ 5.914410] FS: 00007fdaa343c8c0(0000) GS:ffff91bd58440000(0000) knlGS:0000000000000000 kernel: [ 5.914414] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: [ 5.914416] CR2: 0000000000000008 CR3: 00000001222d0000 CR4: 0000000000750ef0 kernel: [ 5.914419] PKRU: 55555554