Greetings!

Getting this every time at boot (via netconsole) on my Pentium 4 box (Shuttle XPC FS51) on kernel 6.3-rc7:

[...] BUG: unable to handle page fault for address: c370a778 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page *pde = 03d7b063 *pte = 0370a062 Oops: 0000 [#1] SMP DEBUG_PAGEALLOC CPU: 1 PID: 1 Comm: systemd Not tainted 6.3.0-rc7-P3 #1 Hardware name: /FS51, BIOS 6.00 PG 12/02/2003 EIP: do_one_initcall+0x12/0x284 Code: 0a 00 64 ff 0d 24 3e 71 c3 e8 82 03 00 00 5d 31 c0 31 c9 31 d2 c3 90 90 55 89 e5 53 57 56 81 ec d4 02 00 00 89 85 20 fd ff ff <a1> 78 a7 70 c3 89 45 f0 64 8b 3d 24 3e 71 c3 8d 85 24 fd ff ff ba EAX: f7c2d000 EBX: f7c2a320 ECX: 00000000 EDX: 00000000 ESI: f7c2a320 EDI: c1b55d88 EBP: c110fd98 ESP: c110fab8 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00210286 CR0: 80050033 CR2: c370a778 CR3: 02091000 CR4: 000006d0 Call Trace: ? 0xf7c2d000 ? check_bytes_and_report+0x2a/0xe8 ? check_object+0x18f/0x2cc ? check_bytes_and_report+0x2a/0xe8 ? check_object+0x18f/0x2cc ? check_object+0x1c2/0x2cc ? init_object+0x6c/0xb8 ? lock_release+0x28/0x22c ? _raw_spin_unlock_irqrestore+0x27/0x5c ? idr_get_free+0x22d/0x244 ? radix_tree_iter_tag_clear+0x18/0x28 ? idr_alloc_u32+0x78/0x94 ? lock_release+0x28/0x22c ? idr_alloc_cyclic+0x38/0x7c ? check_bytes_and_report+0x2a/0xe8 ? check_object+0x18f/0x2cc ? check_object+0x1c2/0x2cc ? init_object+0x6c/0xb8 ? lock_release+0x28/0x22c ? _raw_spin_unlock_irqrestore+0x27/0x5c ? trace_hardirqs_on+0x4b/0x88 ? ___slab_alloc+0x89f/0x94c ? __kmem_cache_alloc_node+0x185/0x268 ? __kmem_cache_free+0x25f/0x268 ? do_init_module+0x1c/0x18c ? kmalloc_trace+0x20/0xa4 ? kmalloc_trace+0x43/0xa4 do_init_module+0x3e/0x18c load_module+0xe6e/0x1004 ? kernel_read_file_from_fd+0x41/0x60 __ia32_sys_finit_module+0x8a/0xa8 __do_fast_syscall_32+0xae/0xd8 ? vm_mmap_pgoff+0x92/0xe4 ? ksys_mmap_pgoff+0x12e/0x170 ? lockdep_sys_exit+0x20/0x84 ? __do_fast_syscall_32+0xba/0xd8 ? syscall_exit_to_user_mode+0x6b/0x160 ? __do_fast_syscall_32+0xba/0xd8 ? __do_fast_syscall_32+0xba/0xd8 ? syscall_exit_to_user_mode+0x6b/0x160 ? __do_fast_syscall_32+0xba/0xd8 ? __do_fast_syscall_32+0xba/0xd8 ? syscall_exit_to_user_mode+0x6b/0x160 ? __do_fast_syscall_32+0xba/0xd8 ? irqentry_exit+0x31/0x74 ? irqentry_exit_to_user_mode+0x25/0x2c ? exc_page_fault+0x355/0x52c do_fast_syscall_32+0x29/0x5c do_SYSENTER_32+0x12/0x18 entry_SYSENTER_32+0x98/0xf1 EIP: 0xb7ee5539 Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 0f 1f 00 58 b8 77 00 00 00 cd 80 90 0f 1f EAX: ffffffda EBX: 00000003 ECX: b77feaf1 EDX: 00000000 ESI: b77ead00 EDI: b77f5128 EBP: 01c781e0 ESP: bf8e4d4c DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00200296 Modules linked in: dmi_sysfs(+) CR2: 00000000c370a778 ---[ end trace 0000000000000000 ]--- EIP: do_one_initcall+0x12/0x284 Code: 0a 00 64 ff 0d 24 3e 71 c3 e8 82 03 00 00 5d 31 c0 31 c9 31 d2 c3 90 90 55 89 e5 53 57 56 81 ec d4 02 00 00 89 85 20 fd ff ff <a1> 78 a7 70 c3 89 45 f0 64 8b 3d 24 3e 71 c3 8d 85 24 fd ff ff ba EAX: f7c2d000 EBX: f7c2a320 ECX: 00000000 EDX: 00000000 ESI: f7c2a320 EDI: c1b55d88 EBP: c110fd98 ESP: c110fab8 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00210286 CR0: 80050033 CR2: c370a778 CR3: 02091000 CR4: 000006d0 note: systemd[1] exited with irqs disabled Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 Kernel Offset: disabled Rebooting in 40 seconds..

Some data about the hardware: # inxi -bZ System: Host: hakla04 Kernel: 6.2.11-gentoo-P3 arch: i686 bits: 32 Console: pty pts/0 Distro: Gentoo Base System release 2.13 Machine: Type: Desktop Mobo: Shuttle model: FS51 serial: N/A BIOS: Phoenix v: 6.00 PG date: 12/02/2003 CPU: Info: single core Intel Pentium 4 [MT] speed (MHz): avg: 3063 Graphics: Device-1: AMD RV350 [Radeon 9550/9600/X1050 Series] driver: radeon v: kernel Display: x11 server: X.org v: 1.21.1.8 driver: X: loaded: radeon unloaded: fbdev,modesetting gpu: radeon resolution: <missing: xdpyinfo/xrandr> OpenGL: renderer: llvmpipe (LLVM 15.0.7 128 bits) v: 4.5 Mesa 23.0.2 Network: Device-1: Ralink RT2500 Wireless 802.11bg driver: rt2500pci Device-2: Realtek RTL-8100/8101L/8139 PCI Fast Ethernet Adapter driver: 8139too

# cat /proc/cpuinfo processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 3.06GHz stepping : 7 microcode : 0x33 cpu MHz : 3062.581 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cpuid cid xtpr bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_unknown bogomips : 6127.24 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management:

# lspci 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 651 Host (rev 02) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] LPC Controller (rev 14) 00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 IDE Controller 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0) 00:03.0 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.1 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.2 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.3 USB controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:0a.0 Network controller: Ralink corp. RT2500 Wireless 802.11bg (rev 01) 00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10) 00:10.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 46) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series] 01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series] (Secondary)

Earlier in dmesg output two "WARNING: inconsistent lock state" show up. Kernel .config and dmesg attached. I don't get this bug on qemu though, only on real hardware.

Regards, Erhard